Search found 136 matches

by Luke
Wed Mar 18, 2020 8:07 pm
Forum: General Discussion Forum (started 2019)
Topic: odd coil
Replies: 10
Views: 637

Re: odd coil

I have noticed, with my electronic tester, that a few coils set for the 'optimum' ~2ms time-to-fire or ttf at 12V (which I believe is what Mike's machine utilises?) will not fire well in a vehicle, nor in a HCCT. Adjusting the electronic tester voltage down tends to support the observed issue (ie. m...
by Luke
Fri Mar 13, 2020 6:27 am
Forum: General Discussion Forum (started 2019)
Topic: Coil capacitors
Replies: 21
Views: 1807

Re: Coil capacitors

No, John's correct.

2 x 0.47uF 400V caps in series will give a total capacitance of 0.235uF at 800V, certainly near enough to the 0.22uF required.
by Luke
Tue Mar 10, 2020 11:31 pm
Forum: General Discussion Forum (started 2019)
Topic: Question about LED lights
Replies: 3
Views: 459

Re: Question about LED lights

If they're standard tungsten filament bulbs then generally yes (with disclaimer below). If they're LED's then possibly not, as many of these are DC only. Even if they have rectifiers built in 12VAC may be too much. Bear in mind that 12VDC is simply that, 12V. However 12VAC could have a peak voltage ...
by Luke
Fri Mar 06, 2020 5:21 pm
Forum: General Discussion Forum (started 2019)
Topic: Period Picture- That Feminime Touch
Replies: 16
Views: 1524

Re: Period Picture- That Feminime Touch

Tim, do you know anything about the subject, or the ultimate source of the photo? Seems to me there could be quite a story there...
by Luke
Fri Mar 06, 2020 5:16 pm
Forum: General Discussion Forum (started 2019)
Topic: Old Photo - "Daddy at the Saloon"
Replies: 20
Views: 1647

Re: Old Photo - "Daddy at the Saloon"

All these aviation stories remind me of another forum I belong to! Stan, I wonder if you have the co-ordinates of the [scary] Dupuyer airstrip you're talking about? I had a quick look around but wasn't really sure of where to settle on. I think it's extremely unlikely I'd ever fly in there, let alon...
by Luke
Fri Mar 06, 2020 4:52 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John, Good to see it in a box, and with the 4-line screen. That's what I was going to leave mine at, but Matt's idea of showing the ramp etc is a good one. It may be possible to have both the LCD and OLED screens running if you'd want - as long as the i2c address of each unit is different, and the A...
by Luke
Wed Mar 04, 2020 2:52 pm
Forum: General Discussion Forum (started 2019)
Topic: Old Photo - "Daddy at the Saloon"
Replies: 20
Views: 1647

Re: Old Photo - "Daddy at the Saloon"

.... Access there is by horse or foot, it does have an airstrip at Benchmark which will pucker all but the best pilots -- you'd better be there early in the morning or late at night, be underloaded, know mountain air currents and have a plane built for flying in and out of airstrips like it. The co...
by Luke
Tue Mar 03, 2020 5:26 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Steve (and others), I apologise but I'm still waiting for components to arrive before I do much more on this. They're taking a very long time, I assume it's to do with the virus. As I don't have an OLED screen the same as Matt's I can't test any changes I'd make to the code, hence it's best that he ...
by Luke
Tue Mar 03, 2020 5:10 pm
Forum: General Discussion Forum (started 2019)
Topic: Old Photo - "Daddy at the Saloon"
Replies: 20
Views: 1647

Re: Old Photo - "Daddy at the Saloon"

I had a go at cleaning up the image and enhancing it to see if one could get more any more detail.

Unfortunately the original isn't all that high a resolution (do you have a better scan Rich?), and I was probably a bit aggressive with some of the tweaks but here it is FWIW:

saloon.jpg
by Luke
Sat Feb 29, 2020 3:48 pm
Forum: General Discussion Forum (started 2019)
Topic: Pedal notches
Replies: 28
Views: 1932

Re: Pedal notches

Larry,

Top marks for the quantitative analysis!

However it appears there's no free play shown? Was there indeed none, or did you start the measurement at first engagement rather than say with the pedal lightly back against it's stop?
by Luke
Fri Feb 28, 2020 6:45 pm
Forum: General Discussion Forum (started 2019)
Topic: The Quiet Ford - an early "advertorial"
Replies: 0
Views: 406

The Quiet Ford - an early "advertorial"

Further to my previous 'historic' posts here's an article on "The Quiet Ford" which appears in the Progress Magazine, Wellington NZ, 2nd August 1909. Between some OCR'ing (thanks to Tesseract and the NZ National Library) and a little manual editing I also add a text version at the end of this post. ...
by Luke
Fri Feb 28, 2020 6:18 pm
Forum: General Discussion Forum (started 2019)
Topic: Early scoop - speculation re upcoming new Ford
Replies: 0
Views: 429

Early scoop - speculation re upcoming new Ford

I came across this article in the Sept 1908 copy of "Progress Magazine", a [approx monthly] periodical published in New Zealand from 1905 to the 1920's. The mag appeared to have a reasonable degree of motoring and other contemporary engineering news, and had obviously been given some 'inside news' r...
by Luke
Fri Feb 28, 2020 5:33 pm
Forum: General Discussion Forum (started 2019)
Topic: Grumpy writer on cost of parts, and cheap Model T's
Replies: 6
Views: 1091

Re: Grumpy writer on cost of parts, and cheap Model T's

As a result of some other research I was doing I came across a little more New Zealand motoring history. More earlier Ford related rather than specifically Model T, but perhaps interesting all the same. In 1905 and 1906 we imported several hundred vehicles, of which approx twenty were Ford's and spe...
by Luke
Thu Feb 27, 2020 9:04 pm
Forum: General Discussion Forum (started 2019)
Topic: Old photo- question the date though?
Replies: 13
Views: 885

Re: Old photo- question the date though?

I was interested to see if this was part of the Burton digital archive - in the hopes that a higher resolution image might have been available for enhancing (I had a go with this one but couldn't improve it much). While I wasn't able to find it immediately I did find the following image of this hard...
by Luke
Sat Feb 15, 2020 1:02 am
Forum: General Discussion Forum (started 2019)
Topic: Is my starter toast?
Replies: 16
Views: 1334

Re: Is my starter toast?

ivaldes1 wrote:
Fri Feb 14, 2020 11:49 pm
While I am waiting for a starter, I wonder what I can cover the starter hole with and just crank start it? -- IV
Yes, this works fine.

Just make a cover plate out of a piece of 20g steel (or whatever) and fix on with the starter bolts/screws...
by Luke
Fri Feb 14, 2020 3:35 pm
Forum: General Discussion Forum (started 2019)
Topic: Pedal notches
Replies: 28
Views: 1932

Re: Pedal notches

Luke, if you purchase a new notch, let that be your guide as to how much your pedal ramp needs to be built up.... Yes, thanks Allan (and others), however I don't have a new notch at this stage - and don't know if need to get one or not without any standard to measure it or the pedal by. Larry and o...
by Luke
Fri Feb 14, 2020 1:40 am
Forum: General Discussion Forum (started 2019)
Topic: Pedal notches
Replies: 28
Views: 1932

Re: Pedal notches

Scott,

Thank you very much, however I mixed up my pedals - it's the brake pedal that's the issue, not first gear, sorry! :oops:

Do you know of any dimensions for that pedal, particularly around the ramp boss?
by Luke
Thu Feb 13, 2020 10:13 pm
Forum: General Discussion Forum (started 2019)
Topic: Pedal notches
Replies: 28
Views: 1932

Re: Pedal notches

Scott,

Mine's LHD - '25 trans, if that makes a difference.
by Luke
Thu Feb 13, 2020 9:33 pm
Forum: General Discussion Forum (started 2019)
Topic: Pedal notches
Replies: 28
Views: 1932

Re: Pedal notches

Please excuse me for butting in, however in relation to this I wonder if anyone has specifications for the pedal cams? I've had a look at the service manual but it doesn't mention anything - perhaps they were all too new when that was written - but it'd be useful to know what the cam/ramp dimensions...
by Luke
Wed Feb 12, 2020 4:28 am
Forum: General Discussion Forum (started 2019)
Topic: Adjusting coils
Replies: 13
Views: 1726

Re: Adjusting coils

Bob, Although the points are on the low tension side you'll have back emf enough that you'd probably get a shock if you utilise non-insulated tools. However the bigger question is why would you want to this? To what standard would you measure against? Ordinarily coils are adjusted outside of the veh...
by Luke
Sat Feb 08, 2020 5:46 pm
Forum: General Discussion Forum (started 2019)
Topic: correct angle or measurement for front axle caster
Replies: 15
Views: 1844

Re: correct angle or measurement for front axle caster

Ed, Erik, You won't get a lot of disagreement from me, however in my case after a series of earthquakes the garage floor just isn't what it was so finding a reasonable spot to use a square isn't that easy. As I use the laser for other cars it wasn't hard to use it on the T, and since I see no reason...
by Luke
Sat Feb 08, 2020 5:28 pm
Forum: General Discussion Forum (started 2019)
Topic: Plastic vs. Wood Coils
Replies: 24
Views: 1578

Re: Plastic vs. Wood Coils

Good to see that innovation, Dick. It'll be interesting to hear how your trials go with a few more miles on them, hope you have continued success. FWIW I have a plastic coil here that I was given recently. I'm think I'm going to use it when I research and design my own electronic timer; it's trivial...
by Luke
Sat Feb 08, 2020 5:22 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved cars, actual first date of production?
Replies: 17
Views: 1194

Re: Improved cars, actual first date of production?

Jim, Kevin, Rick, Thanks for the continued information. I find it fascinating in general, but also useful to give me a better idea of what I've got. Kevin, you may be close to what's happened with mine as I had to replace the front chassis gussets prior to registering here. Hard to say whether they ...
by Luke
Thu Feb 06, 2020 4:58 am
Forum: General Discussion Forum (started 2019)
Topic: correct angle or measurement for front axle caster
Replies: 15
Views: 1844

Re: correct angle or measurement for front axle caster

Allan, If you have a perfectly flat floor then that should work fine (flat not being the same as level!). Out of interest; over the years I've tended to look for simple but accurate methods to do my alignments. The first one I did was nearly 40 years ago now (using a Dunlop optical gauge that I stil...
by Luke
Thu Feb 06, 2020 12:06 am
Forum: General Discussion Forum (started 2019)
Topic: Grumpy writer on cost of parts, and cheap Model T's
Replies: 6
Views: 1091

Re: Grumpy writer on cost of parts, and cheap Model T's

I never knew you could buy an Electric Model T. Must have only been for sale in NZ. We're pretty special down this way :D Actually, I recently took my T to an electric car group evening 8-) . Took several people for a ride and generally had a good time - there's just something about the beat of a T...
by Luke
Wed Feb 05, 2020 11:58 pm
Forum: General Discussion Forum (started 2019)
Topic: correct angle or measurement for front axle caster
Replies: 15
Views: 1844

Re: correct angle or measurement for front axle caster

Allan, First of all my apologies, I grabbed my metric verniers when I went out to my car... I get 117mm between the centre of the bottom and top flanges. At 5 degrees the difference from vertical would be 10.2mm, at 5.5degrees it's 11.2mm. Also, when I did my alignment recently I used a cross-laser ...
by Luke
Wed Feb 05, 2020 9:12 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved cars, actual first date of production?
Replies: 17
Views: 1194

Re: Improved cars, actual first date of production?

Dan, thanks for your info. Interesting re GA, that would have been useful to know when I was trying to deal with the bureaucracy here! FWIW the car does seem to appear in an online register, its VIN is the engine serial number. The trans pedals are pre-26 (ie. not wide), so perhaps a complete engine...
by Luke
Wed Feb 05, 2020 8:56 pm
Forum: General Discussion Forum (started 2019)
Topic: Grumpy writer on cost of parts, and cheap Model T's
Replies: 6
Views: 1091

Grumpy writer on cost of parts, and cheap Model T's

As part of some research for a friend I came across some interesting newspaper clippings: The first was a letter to the Otago Daily Times, dated 16th Dec 1929. Clearly there had been, or was about to be, a significant increase in the cost of spares, and the writer was unhappy: odt_16_dec_1929.png Fo...
by Luke
Wed Feb 05, 2020 5:45 pm
Forum: General Discussion Forum (started 2019)
Topic: Bosch DU4 Magneto Manual
Replies: 9
Views: 490

Re: Bosch DU4 Magneto Manual

I'm happy to do that Tim, have sent you an email.
by Luke
Tue Feb 04, 2020 10:50 pm
Forum: General Discussion Forum (started 2019)
Topic: Bosch DU4 Magneto Manual
Replies: 9
Views: 490

Re: Bosch DU4 Magneto Manual

Tim, Danny, I hope you don't mind but I've taken the images, cleaned/straightened them as best as possible, and created a PDF manual. The result is attached here, I've had to downsample it 'cos I couldn't upload a 5.7MB file, but it's ok I guess. Tim, perhaps you could check if I've got the pages in...
by Luke
Tue Feb 04, 2020 2:54 pm
Forum: General Discussion Forum (started 2019)
Topic: 6v to 12v model T starter conversion
Replies: 13
Views: 765

Re: 6v to 12v model T starter conversion

Tony, As luck would have it I'm in the process of moving my car over to 12V and LED lighting and have been going through the research/design stage. By my calculations I'd be needing just on 5A at night with the lights and motor running, so with your customer and similar LED's your name would still h...
by Luke
Tue Feb 04, 2020 3:57 am
Forum: General Discussion Forum (started 2019)
Topic: Model T stats for New Zealand - and a wild guess for the rest of the world
Replies: 0
Views: 311

Model T stats for New Zealand - and a wild guess for the rest of the world

Not as if I didn't have a lot of other things to do I thought I'd take a quick peek to see how many Model T's we had in NZ. This is a question I'm almost always asked whenever someone sees my car and I have, up 'till now, not been able to answer. Fortunately I've ways of dealing with big data and ha...
by Luke
Mon Feb 03, 2020 8:35 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved car brake rivet size, and friction material for bands?
Replies: 11
Views: 507

Re: Improved car brake rivet size, and friction material for bands?

Dan, yes I did read about the early metal-metal brakes. Guess they really were for parking only! I accept that one could use pop rivets, it's just that I wouldn't. I'm no stranger to doing whatever's needed to make things work, and I expect if one only used the brakes when stationary it would be fin...
by Luke
Mon Feb 03, 2020 8:17 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved cars, actual first date of production?
Replies: 17
Views: 1194

Re: Improved cars, actual first date of production?

Gosh, thanks everyone for your help - it's certainly given me a bit to go on! Dan & Larry, I'll attach a couple of photos below, from your information it seems to me that the motor may not be original as it doesn't appear to have the boss, also it doesn't have the wider brake band so I guess it mean...
by Luke
Mon Feb 03, 2020 2:17 am
Forum: General Discussion Forum (started 2019)
Topic: Improved car brake rivet size, and friction material for bands?
Replies: 11
Views: 507

Re: Improved car brake rivet size, and friction material for bands?

Tailpiece - having looked again at some of the postings I'd previously seen I now recollect that I did see the rivet 'reversed' in the band material :oops: clearly my recent foray into the brakes and the horror story there was too vivid in my mind. At least that's my excuse, maybe age has something ...
by Luke
Mon Feb 03, 2020 2:10 am
Forum: General Discussion Forum (started 2019)
Topic: Improved cars, actual first date of production?
Replies: 17
Views: 1194

Improved cars, actual first date of production?

Not wanting to hijack Scott C's thread on his 26-27 Roadster, but it prompted me to ask something I've wondered about for a while. I have '26 (well, maybe it's a '26) 'New Beauty' runabout. It was imported into this country from Douglas County, GA, somewhere between 2011-2013. Having looked it up I ...
by Luke
Sun Feb 02, 2020 10:51 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved car brake rivet size, and friction material for bands?
Replies: 11
Views: 507

Re: Improved car brake rivet size, and friction material for bands?

....reason you must use bifurcated or split rivets in woven trans band lining is to sink the teeth of those splits into the woven soft fabric linings so the linings don’t pull away from the trans bands.... Ah, thanks Dan. I've not had occasion to replace my bands yet and had assumed the head of the...
by Luke
Sun Feb 02, 2020 7:55 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved car brake rivet size, and friction material for bands?
Replies: 11
Views: 507

Re: Improved car brake rivet size, and friction material for bands?

Jim, Thanks, I'd read quite a bit on band replacement but didn't find an answer to my curiosity over lining material. And having the perverse 'need to know why ' that I do I'm still not sure that the brass brake rivets couldn't be used without ill effect. I've possibly missed the post that explains ...
by Luke
Sun Feb 02, 2020 5:46 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved car brake rivet size, and friction material for bands?
Replies: 11
Views: 507

Re: Improved car brake rivet size, and friction material for bands?

Thanks Dan, very quick reply, and just what I needed :-) I'm pleased to hear the transmission band & brake shoe rivets are the same size. Although the 'proper' ones are bifurcated I see no reason at this stage why I couldn't use the same rivets for both jobs. Saves buying two separate boxes of them ...
by Luke
Sun Feb 02, 2020 3:15 pm
Forum: General Discussion Forum (started 2019)
Topic: Improved car brake rivet size, and friction material for bands?
Replies: 11
Views: 507

Improved car brake rivet size, and friction material for bands?

Hi, Hoping someone could tell me the correct size for the brass brake shoe fixing rivets for a '26 please (with the larger brake drums)? These are the part hollow rivets that are fitted through the friction material to the metal shoe itself. In my case I expect the friction material to be 3/16" thic...
by Luke
Sun Feb 02, 2020 3:02 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Neil, I'd hoped that Mike K was going to respond to your question because I've never seen one of his ECCT's, let alone operated one, so I'm not the best person to ask, sorry. However I think Mike sets a target time to fire, and all coils are measured against this. If a coil takes a longer or shorter...
by Luke
Fri Jan 31, 2020 7:44 pm
Forum: General Discussion Forum (started 2019)
Topic: Ten Character minimum for message???
Replies: 14
Views: 920

Re: Ten Character minimum for message???

W Austen wrote:
Fri Jan 31, 2020 6:45 pm
Now that it's 2020 maybe it will move to 20
Eh? Don't you mean 40! :-)

It's 2022 we've got watch out for:

https://simple.wikipedia.org/wiki/42_(answer)
https://www.independent.co.uk/life-styl ... 05734.html
by Luke
Fri Jan 31, 2020 6:14 pm
Forum: General Discussion Forum (started 2019)
Topic: Ten Character minimum for message???
Replies: 14
Views: 920

Re: Ten Character minimum for message???

Having had something to do with forum software I expect it's just that a version upgrade will have introduced some standard conditions that weren't there before, and which the admins may or may not wish to alter at some stage. A bit like the loss of location detail that occurred - possibly at the sa...
by Luke
Fri Jan 31, 2020 6:06 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John, Pleased to hear you've been using the software (where's the thumbs up icon?!), thanks for letting us know :D Yes it's meant to be a triple pole two-way switch - not my best diagram I'm afraid. It's simply there to switch the coil to either the FET/H-bridge, or the cap test pins on the Arduino....
by Luke
Thu Jan 30, 2020 8:21 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Neil, The 'FACT' theory of operation and that of the ECCT are essentially the same. The essence of it is that a motor doesn't care about 'average current setting' (ala HCCT), rather it simply wants to see consistent spark at the right time, and across all four cylinders. With modern electronics it's...
by Luke
Thu Jan 30, 2020 3:15 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Coil testing data

As mentioned earlier, on Wednesday we tested a number of coils from several sources. The coils included brass-tops and plastics. The methodology used was to initially set the points (some were dressed) by feeler gauge, then test the capacitors and set the coil timing in the 'FACT' at 12.1V. Primary ...
by Luke
Wed Jan 29, 2020 11:46 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Scott, Chris' meter scale is fairly cramped at the lower end, 2V might be difficult to determine, and for various reasons it'll be several weeks before any further opportunity to test so I'm not able to comment on that much further. However wrt your enquiry on the range of average current draw, and ...
by Luke
Wed Jan 29, 2020 4:23 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Scott, Regularity of spark at low voltage would be affected largely by points condition and adjustment (all other parameters being equal). At the risk of going over old ground too often: Setting coils via ttf method is done to ensure that all of the coils in a set of four will fire at the same time,...
by Luke
Wed Jan 29, 2020 1:15 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Scott, That comment was poorly worded on my part because what you took from it is not quite what I intended it to mean, sorry :? However, to centre on your conclusion, and so that I don't misunderstand, are you saying that you consider it will be harder to crank start your car with coils set by ttf,...
by Luke
Tue Jan 28, 2020 4:40 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Mike, I fully agree that quantitative data for performance is much preferred and indisputable. It's good you've done that work and can provide some hard detail for those interested enough to look at it. There is of course the slightly more qualitative 'smoothness' of an engine too that may be a fact...
by Luke
Tue Jan 28, 2020 3:48 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

I'm curious as to why an AC source equivalent to the Mag was not considered for the input voltage of the tester rather then a 12VDC or 6VDC source (other than the added complexity and cost of additional circuity)? The RMS value (the DC component) of the AC magneto at speed is higher than the 12VDC ...
by Luke
Mon Jan 27, 2020 2:59 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Jim, I didn't check their inductance, but with Chris' (owner's) indulgence I may be able do that tomorrow and will let you know. As a complete aside I'm presently waiting for some parts to arrive before (hopefully) finalising the tester design, at least for me. Unfortunately as we're at the bottom o...
by Luke
Mon Jan 27, 2020 2:52 am
Forum: General Discussion Forum (started 2019)
Topic: Question on babbitting
Replies: 17
Views: 1406

Re: Question on babbitting

Will, just a supporting comment here as I completely 'get' the desire to do new things and learn through fixing things oneself. I expect to be doing the same with my engine (or a donor) in the near future. Although I did something similar many years ago it's sufficiently long ago that it doesn't rea...
by Luke
Mon Jan 27, 2020 2:43 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Mike, Thanks for the link. It looks like you did a thorough job, and I expect it was personally satisfying to have your thesis and work affirmed. It can also be quite interesting just working out how to test such things and carrying it out can't it! I've been staggered at the variability in inductan...
by Luke
Tue Jan 21, 2020 4:59 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Chris, As far as the tester is concerned, with the way it's wired up at present you could simply supply 30V (or whatever) to the input of the switching device and it would record the events normally. Both the BTS7960 and the L298 would handle that ok. John (and Chris), You've echoed some earlier com...
by Luke
Mon Jan 20, 2020 8:36 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John, Quite agree it's the consistency across coils that matters most, but thanks especially for your views on absolute time. It was some time ago that you wrote your article and I'd wondered if you'd discovered anything in the interim. Clearly you've tested a lot of coils and would have a very good...
by Luke
Mon Jan 20, 2020 4:48 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Version update, responses

Jeff, My memories of etching PCB's are less 'fond' than yours methinks! I seem to recall adding acid to the solution to speed things up (and heating it) :shock: but the bit I really didn't like was drilling all the holes, now that was particularly painful. I too have wondered what Henry would think....
by Luke
Sun Jan 19, 2020 7:01 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Matt & John, I use a Nano, it's a bit cheaper/smaller than the Uno, and you can solder directly to it if you want. It has the regulator just like an Uno so you can run it on 12V. Just commenting here - there's nothing wrong with the Uno! With the diagram just bear in mind there's another switch to g...
by Luke
Thu Jan 16, 2020 11:31 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John, Thanks for that - it brings back memories! Your experience re the coil working better with a shorted output was similar as mine, except I had written some software to utilise the ringing principle similar to what you describe. Oh well! Yes, that's a good idea of Matt's, the shape of the ramp, ...
by Luke
Thu Jan 16, 2020 7:49 pm
Forum: General Discussion Forum (started 2019)
Topic: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***
Replies: 46
Views: 1263

Re: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***

Peter, I've got the scans you sent by email and have responded, thanks. I'll give them a quick touchup and will see if I can post them in place of the earlier ones that I did from John's images. It may be they need to be shrunk a little in terms of data size. Update. Peter here are your original ima...
by Luke
Thu Jan 16, 2020 3:41 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Good job on that display Matt! I'm also pleased to read someone else burns the midnight oil on such projects :-) I'd got a monochrome version of one of those displays coming from some time ago but they take a while to get here, so it's great that you've done that work. FYI at a later stage I was goi...
by Luke
Thu Jan 16, 2020 3:04 pm
Forum: General Discussion Forum (started 2019)
Topic: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***
Replies: 46
Views: 1263

Scanned docs

JohnH and Peter (Luxford), thanks for the scan info. I think that to avoid messing this thread around, and because of the likely image data size, it might be better to discuss this in email? Peter, I think you've sent me a PM to which I will respond shortly, cheers. Martynn, Thanks for explaining yo...
by Luke
Thu Jan 16, 2020 1:06 am
Forum: General Discussion Forum (started 2019)
Topic: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***
Replies: 46
Views: 1263

Re: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***

John, is there any interest in cleaning up that instruction book and making it more usable for printing? Below is an attempt. I expect you've got a better resolution scan (?) but you can get an idea of how it might come out... Update - the images below are now adapted from Peter's images. I do them ...
by Luke
Wed Jan 15, 2020 11:55 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John, Thanks for the info. I'd not bothered to check the inductance of the secondary but will check that out with the suspect unit I've presently got. I would be interested to know what result you get from the LOPT tester. I think I know the one you're talking about, DS or somebody like that did a k...
by Luke
Wed Jan 15, 2020 4:30 pm
Forum: General Discussion Forum (started 2019)
Topic: '16 Centerdoor restore...
Replies: 381
Views: 23360

Re: '16 Centerdoor restore...

Don, Please excuse me if it's of no use to you but here's a couple of similar views from a local car that appeared yesterday. Year is prob your 1919 equivalent so may not be the same (I've no idea of any differences!), but if you want any other views please let me know and I'll see what I can do. ce...
by Luke
Wed Jan 15, 2020 4:05 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Thanks John, I appreciate the input as I'm flying blind a little on some of this. Fundamentals are all very well but there's nothing like experience in the field! Given what you say, and if it turns out to be a non-event (as it now seems likely to be) I may well leave the shorted turns function out,...
by Luke
Wed Jan 15, 2020 3:55 pm
Forum: General Discussion Forum (started 2019)
Topic: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***
Replies: 46
Views: 1263

Re: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***

And one from a 1920 (I realise these are outside the year range for the tank, but assume it's useful for you throttle assy data?):
1920_throttle.jpg
1920_throttle.jpg (49.71 KiB) Viewed 864 times
by Luke
Wed Jan 15, 2020 4:56 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

A brief update. I made up a quick shorted turns tester. I was happy with the theory and it worked well enough in terms of what I'd expect, but in testing the Model T coils I wasn't sure it was reporting quite what I'd want (if it were faulty). Chris has been kind enough to lend me the coil that was ...
by Luke
Wed Jan 15, 2020 4:38 am
Forum: General Discussion Forum (started 2019)
Topic: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***
Replies: 46
Views: 1263

Re: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***

Martynn,

I'm not sure if you're still needing any throttle linkage data? Just in case here are three photos - two from a 1915, and one from a 1927 RHD vehicle

IMG_0207.JPG
IMG_0208.JPG
IMG_0209.JPG
by Luke
Tue Jan 14, 2020 3:53 pm
Forum: General Discussion Forum (started 2019)
Topic: '16 Centerdoor restore...
Replies: 381
Views: 23360

Re: '16 Centerdoor restore...

Don, is that photo of Dan Killicut's family? I thought I'd try a quick cleanup to see how it would come out... Sepia, as original but with a few areas 'fixed' and general spot repairs etc 16cdoora-4.jpg B&W 16cdoora-5.jpg A bit further on B&W 16cdoora-6.jpg And, cleaned up this way, back to sepia (o...
by Luke
Tue Jan 14, 2020 12:24 am
Forum: General Discussion Forum (started 2019)
Topic: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***
Replies: 46
Views: 1263

Re: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***

That's John's photo, not mine.

Sorry if I confused things by butting in, it's just that we get up a few hours earlier :mrgreen:

I expect that John will post the requisite photo but if not I'll see if one could be arranged tomorrow.
by Luke
Mon Jan 13, 2020 5:54 pm
Forum: General Discussion Forum (started 2019)
Topic: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***
Replies: 46
Views: 1263

Re: ***1926-1927 Cowl Mounted Fuel Tank for RHD Vehicles***

Martynn, Yes that's right. I'm a little lower down than John but our RHD cars have the advance lever to the outside (RHS) and the throttle to inside of the cab (LHS). For me, with a LHD vehicle, I need to remember it that way (outside/inside) so I don't mess things up when swapping between LHD/RHD...
by Luke
Sun Jan 12, 2020 6:06 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Matt, Thanks for the explanation, certainly it confused me :-) I felt it useful to to do a resistance test because I thought there could be a fault from leakage across the old coil box, or a leaky cap that might otherwise test ok. In order to grasp how it works just consider the cap as a resistor (l...
by Luke
Thu Jan 09, 2020 8:05 pm
Forum: General Discussion Forum (started 2019)
Topic: Cimorelli contact?
Replies: 4
Views: 432

Re: Cimorelli contact?

Thanks, appreciate the pointer anyway :-)
by Luke
Thu Jan 09, 2020 3:18 pm
Forum: General Discussion Forum (started 2019)
Topic: Cimorelli contact?
Replies: 4
Views: 432

Re: Cimorelli contact?

Thanks Mark,

I saw that but the email address it referenced didn't seem to be a real one? Have you had success with it?
by Luke
Wed Jan 08, 2020 5:42 pm
Forum: General Discussion Forum (started 2019)
Topic: Cimorelli contact?
Replies: 4
Views: 432

Cimorelli contact?

Recently I downloaded a file from Cimorelli's (very useful) site. A few days ago I spent several hours cleaning up the file contents incl lining up pages and generally improving its legibility (particularly for printing). As thanks and in the spirit of their generosity I would like to contribute it ...
by Luke
Wed Jan 08, 2020 5:32 pm
Forum: General Discussion Forum (started 2019)
Topic: An article my Dad wrote in regards to Ford of Canada documents
Replies: 4
Views: 405

Re: An article my Dad wrote in regards to Ford of Canada documents

Thanks Colin, I was interested to find out more, unfortunately it turns out the URL mentioned in the article no longer works, however these two provide some further detail and several links to other Ford related data: http://leddy.uwindsor.ca/archives/ford-motor-company-canada-limited-1904-1971 http...
by Luke
Wed Jan 08, 2020 5:04 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Chris, The faulty coil showed a low current draw in the 'FACT', and IIRC it had a reasonably high SD. In the HCCT it was also erratic, but it showed a particularly high averaged current. These issues continued after several attempts at setting the coil, including a new set of points. Although not a ...
by Luke
Wed Jan 08, 2020 5:23 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

More progress

A brief report on a couple of useful things that arose today. The first is that I was able to try out the tester on some other coils (thanks Chris), and we later tried some setup by the tester in a car. Qualitatively the car went at least as well as it did with coils set on the HCCT. Coils set up on...
by Luke
Tue Jan 07, 2020 4:23 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Capacitor value and coilbox leakage test - interim code

So my (work) year has started already, meaning I have less time to mess with T stuff :( Fortunately I'd written a rudimentary function for the capacitor value and coil-box leakage tests I was interested in. This forms part of v0.95 of the main code, which I've yet to complete and release. However fo...
by Luke
Sun Jan 05, 2020 3:09 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Matt, Yes, I don't know what it is about electronic projects but they're the messiest things around! I've taken aeroplanes to pieces (and put them back together!) that never seems to generate the same amount of cr*p :roll: Good job with the code. You're now at the point where I was/am wrt to connect...
by Luke
Sat Jan 04, 2020 5:10 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Some data from different voltage testing

I had occasion to test four coils this morning. Given the intended mode of these, and the interest I had in operational voltage I did a quick comparison at two discrete voltage inputs. All four coils were set to fire at Mean 3.31-3.33 msecs at 7V. One a multi-fire test of 50 cycles at an equivalent ...
by Luke
Sat Jan 04, 2020 4:12 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Chris, No, the ramp time for the coils increases with reduced voltage, as I think one could expect. I can imagine Ron's comment was due to some exasperation over a particularly recalcitrant coil? Personally I think the coil operation is reasonably logical and predictable, it's just that they're not ...
by Luke
Sat Jan 04, 2020 2:04 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Some results from experimenting

I was going to code in the capacitor tester today but got sidetracked for several reasons. One of these was that, in wanting to make this easy for people to replicate I'm not switching the coils the way I would do it personally (using a FET), rather I'm using a module that essentially just requires ...
by Luke
Thu Jan 02, 2020 10:24 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Code update.

Just in case anyone downloaded the code from last night I've just now replaced it with a minor version number update (rather than post it all again)...
by Luke
Thu Jan 02, 2020 3:44 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John, Thank you, that's very helpful - your trace seems to me the epitome of what I'd thought a good coil would look like, with the possible exception of the plateau time, and with no further spikes I expect the tester will be reporting just what the trace shows. A couple of things arise. Having re-...
by Luke
Thu Jan 02, 2020 1:00 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Roundup, now self-contained, new code

Perhaps time for brief recap on the tester. Remember this came about because I was having trouble with my T and had thought it might be the coils. As it happened it wasn't, but by the time I determined that I'd started down the track of making a tester to check the coils out. I'd never seen a HCCT f...
by Luke
Wed Jan 01, 2020 3:54 pm
Forum: General Discussion Forum (started 2019)
Topic: Jacking up a rear wheel: Does it matter which one?
Replies: 32
Views: 2022

Re: Jacking up a rear wheel: Does it matter which one?

As I understand it, in America and places with Left-hand drive (crank goes clockwise) you jack up the left rear wheel. In England, Australia, etc. where they have Right-hand drive (crank turns counter-clockwise) you jack up the right rear wheel. Jeff, Actually it's much easier for us down here - we...
by Luke
Wed Jan 01, 2020 3:42 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Matt, My apologies, the screenshot of the tester switched output had some different code in the Arduino, which is why it was showing 100msec period (I'd been away for the day and forgot I'd been messing with it the night before). Using the code as is up on the site presently the period shows up as 5...
by Luke
Wed Jan 01, 2020 4:19 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John Housego, Thanks for the update, I'm pleased the intermittent misfiring issue was easily found and rectified - at least it wasn't a bug in the code! I'm sorry but I've a few versions of the code floating around however I think the '66' figure should appear in the code twice (once in the single_t...
by Luke
Tue Dec 31, 2019 2:12 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John, I'm pleased to see you've got it running and have some results, thanks for posting! A couple of things to note: Since you're using a 20A module (which I agree is probably the better of the three) you'll need to make a minor alteration to a couple of lines of the code, if you haven't already. T...
by Luke
Tue Dec 31, 2019 5:15 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Tom, Hopefully someone else with more experience on this will respond (John H, Mike K?), but FYI I did check the inductance of the two coils I've got and I was surprised to see that they were markedly different. As I recall one was something like 198uH whereas the other was up around 250uH or so - t...
by Luke
Tue Dec 31, 2019 12:44 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Matt, Yes, I appreciate the incongruence in putting up such plots etc while working on 100+ y.o. tech (I'm not sure exactly how your wife put the statement but... :lol: ) Good to see your calcs, hopefully you'll get some of the detail you're looking for in return. Just one thing though - I don't thi...
by Luke
Tue Dec 31, 2019 12:22 am
Forum: General Discussion Forum (started 2019)
Topic: T sputters when turning a corner or hits bump
Replies: 19
Views: 965

Re: T sputters when turning a corner or hits bump

Mack,

Does it present the same problem on both battery and magneto? I ask simply because you could probably isolate part of the electrical system as a cause by trying both feeds...
by Luke
Mon Dec 30, 2019 8:14 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

JB, thanks for the link, I would much prefer to adjust the coils 'nicely' as is described there. However I'm not quite ready to 'fix' this faulty coil yet. For the purposes of making and testing the tester it's potentially more useful to have a faulty/erratic coil than a good one. So I think I'll st...
by Luke
Mon Dec 30, 2019 7:06 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

jb, Matt, I've just emailed you a couple of datasets from two multi-fire tests. These include the raw data from each sensor sample over time, and a conversion to real-world current. I've not broken the individual firings down but It should be clear where they start and stop. There are 150 samples pe...
by Luke
Mon Dec 30, 2019 4:33 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

Chris, I like your explanation of the coil operation, and the due reminder of what this is all about! You've touched on something that I'd be contemplating for a while - the tension on the points. It'd seemed to me, between the few coils I'd handled, that this could be somewhat variable, and that th...
by Luke
Mon Dec 30, 2019 3:08 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

A few observations and some new code

Given Matt's concern over the CT variation in output, and following on from something I'd been working on, I took the tester over to Robert's place today and we did some comparative measurements. I had remembered that I had an ACS712 30A current module that was suitable to use with the Arduino and c...
by Luke
Mon Dec 30, 2019 2:33 am
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

JB, thanks for the clarification, I understand now what it is you want to see wrt the RMS current measure methodology of the HCCT vs the 'time to fire' method of an electronic tester. I'll need to give it some thought. While I can see it'd be interesting to directly compare/correlate the two methodo...
by Luke
Sun Dec 29, 2019 3:18 pm
Forum: General Discussion Forum (started 2019)
Topic: A new DIY electronic coil tester.
Replies: 190
Views: 9889

Re: A new DIY electronic coil tester.

John Housego, That's good news, and I'm sorry to have been instrumental in the initial problem! I should probably have made it clearer that the 100 ohms was a nominal value, and that one should use the data sheet for whatever CT is used in order to fit the right burden resistor. I see in the data yo...