Fuel line

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marctee
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Fuel line

Post by marctee » Sat May 15, 2021 10:30 pm

Whats the correct fuel line set up , drawing for a 1924 ? Does it have to be a perfect up from tank to downhill to carb ? above or below chassi ? close to chassi ?


Scott_Conger
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Re: Fuel line

Post by Scott_Conger » Sat May 15, 2021 11:07 pm

Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves
Obsolete carburetor parts manufactured


Rod Petrie
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Re: Fuel line

Post by Rod Petrie » Wed May 19, 2021 8:59 am

I am confused. I thought the fuel line should run as straight as possible without any big dips or humps in it to afford flow problems. I routed mine next to the hogshead because it seemed there would be a longer smoother bend than routing next to the frame. Now I am wondering if I did it wrong. I used a steel line from Langs. On my post about my broken hogshead someone mentioned that it should be routed differently.

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George House
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Re: Fuel line

Post by George House » Wed May 19, 2021 9:20 am

Yep,....it should be routed differently. The book sez the fuel line should be routed under the wood block that fits between the frame and right crankcase ‘ear’. Someone will have a diagram from the Service Manual.

Well, there you go; our friend Scott supplied the illustration. I didn’t notice it before
I don’t know why I turned out this way. My parents were decent people 🤪


Scott_Conger
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Re: Fuel line

Post by Scott_Conger » Wed May 19, 2021 9:29 am

That diagram is in the link I provided
Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves
Obsolete carburetor parts manufactured


Caswell
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Re: Fuel line

Post by Caswell » Wed May 19, 2021 9:37 am


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JTT3
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Re: Fuel line

Post by JTT3 » Wed May 19, 2021 10:34 am

Here’s the pictures from the links others provided.
Attachments
1027ABD8-57B0-4511-96F3-6E7C45092D23.jpeg
A1F99F96-37A5-439B-8F36-750B202A5E76.png


Norman Kling
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Re: Fuel line

Post by Norman Kling » Wed May 19, 2021 11:54 am

The diagram posted by JTT3 is according to the book. Most important thing is to clamp the line to the frame where it passes under the exhaust. It is OK to have a low point in the middle of the line. But there should be only one low point and the line should go uphill from that point to both ends so that any air or vapor bubbles which could be in the line will rise to either the tank or the carburetor. otherwise if there is a high point in between the two ends the bubble will stay at the high point causing "vapor lock".
Norm


Original Smith
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Re: Fuel line

Post by Original Smith » Thu May 20, 2021 10:51 am

It seems like this question is posted at least twice a year! I guess some just don't read the forum!


Norman Kling
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Re: Fuel line

Post by Norman Kling » Thu May 20, 2021 10:58 am

That's OK. To some, this question is a new one. Also, some have not learned to find old posts on the forum. Like me. I was able to look up things on the old forum, but then a new format was started. It's hard to teach an old dog, new tricks. I guess I am an old dog. I don't mind seeing and responding to posts which are repeats of old ones.


jiminbartow
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Re: Fuel line

Post by jiminbartow » Thu May 20, 2021 11:24 am

Even old, frequently discussed posts, can generate new conversations, ideas , concerns and questions, such as mine.

By owning a 1926 “Improved” coupe, with the tank mounted high up in the cowl, I don’t have the problem of such a shallow decline from the underseat tank to the carb. This said, does the heat from the exhaust pipe cause a problem or potential fire hazard? I know my pipe gets very hot. As a precaution, would a pad of asbestos insulation between the pipe and fuel line help to keep the fuel line from getting too hot? It seems like the danger would be most prevalent after the car was stopped following a long, hot drive, when there was no longer any cooling air blowing under the forward moving T and the fuel remained stationary in the fuel line, close to the hot exhaust. Not so much during the drive, when the fuel would move continuously through the fuel line thereby keeping it relatively cool. Seeing the fuel line so close to the exhaust just makes me uncomfortable since I do have a, not yet restored, 1926 Fordor with an underseat tank on which this condition will eventually need to be addressed when I can find the time to restore it, but at 67, I need to get to it before I’m completely wore out. Jim Patrick

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