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Holley NH Carb question
Posted: Thu Aug 07, 2025 5:00 pm
by Mike S
Okay, I am a newbie, but does anyone have a photo of an installed Holley NH, later model with the universal joint type mixture adjustment on their car? Mine doesn't fit well and I have another (new) rod that is supposed to fit that carb. I just want to know if what I have is installed correctly. I am most concerned with the point where it connects to the mixture/choke rod.
Thanks!
This is mine that I am trying to get correct.
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 5:16 pm
by speedytinc
The carb is pre 23. The throttle lever should be shorter.
The choke lever arms should also be shorter with an offset in 1 arm to clear the choke pull rod.
Fuel line routing is also wrong. Close to the manifold center.
The line runs straight down from the valve & 90 degree horizontal @ the inlet level.
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 5:18 pm
by Moxie26
You will need to get a similar set screw choke wire anchor on the rod and position it so it does not interfere with the hot air pipe when you turn the mixture screw... After that's done, just simply measure for another connecting wire between the pull and the carburetor choke lever
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 5:21 pm
by Mike S
Hey, thank you. Do I need to redo the fuel line? I am a complete newbie and don't know what to do! Thank you!
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 5:24 pm
by speedytinc
There was not a shaft collar originally. A cotter pin, as you have on the bottom is correct.
The pictured fuel line doesn't look correct either. The fuel line fittings are not correct.
The heat pipe (actually an accessory automatic choke) is also incorrect.
Don't use this picture if you want to be correct.
A correct pix will come along.
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:08 pm
by Mike S
Those pictures are what are in the car right now. I just want to correct it.
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:12 pm
by Mike S
Moxie26 wrote: ↑Thu Aug 07, 2025 5:18 pm
You will need to get a similar set screw choke wire anchor on the rod and position it so it does not interfere with the hot air pipe when you turn the mixture screw... After that's done, just simply measure for another connecting wire between the pull and the carburetor choke lever
Sorry, I thought that those were my original photos. Thanks!
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:14 pm
by speedytinc
Mike S wrote: ↑Thu Aug 07, 2025 6:08 pm
Those pictures are what are in the car right now. I just want to correct it.
I just googled the following: mtfca model t 1926 carburator linkage.
There are the correct pictures of the improved carb linkage & fuel line run.
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:29 pm
by Mike S
Thanks everyone! I just got the photo and hopefully can get this corrected!
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:48 pm
by Moxie26
Hey Speedytinc ..... Will all of us get to see those pictures besides Mike S. ????..
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:51 pm
by Mike S
Moxie26 wrote: ↑Thu Aug 07, 2025 6:48 pm
Hey Speedytinc ..... Will all of us get to see those pictures besides Mike S. ????..
I "oogled" it and found the picture! mtfca model t 1926 carburator linkage and found this:
https://www.mtfca.com/discus/messages/5 ... 1448739372
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:53 pm
by Moxie26
Share the picture already. I can't stand the suspense
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 6:55 pm
by Mike S
Moxie26 wrote: ↑Thu Aug 07, 2025 6:53 pm
Share the picture already. I can't stand the suspense
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 7:02 pm
by Mike S
Evidenty I need this.
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 7:32 pm
by Mike S
Hey guys! I truly appreciate your help! I am so VERY new to all this that I have to rely on your help to send me in the right direction! Furthermore, I thank you more than I can express!
Re: Holley NH Carb question
Posted: Thu Aug 07, 2025 8:02 pm
by speedytinc
Looks to me you have that part. Its just turned 90 degrees off & has a washer over it.
Re: Holley NH Carb question
Posted: Fri Aug 08, 2025 9:50 am
by Mark Nunn
This is how I ran the fuel line.
Re: Holley NH Carb question
Posted: Fri Aug 08, 2025 10:36 am
by Moxie26
Speedytinc. ..... Post pictures of your '27 T. engine and carb installation to compare.
Re: Holley NH Carb question
Posted: Fri Aug 08, 2025 11:18 am
by speedytinc
OP asked to see what's "correct."
I provided a previous post with pictures of the correct carb & fuel line.
Do not use my fuel line connection as an example, It is not correct either.
The difference is, I know it.
Re: Holley NH Carb question
Posted: Fri Aug 08, 2025 10:06 pm
by Allan
John, your cutout is not correct either.
Allan from down under.
Re: Holley NH Carb question
Posted: Sat Aug 09, 2025 2:17 am
by Craig Leach
Hi John, I absolutely love the manifold, dual carbs, vaporizer exhaust. What is that casting? Allan with all that going on you noticed the
cutout?
Craig.
Re: Holley NH Carb question
Posted: Sat Aug 09, 2025 9:14 am
by Moxie26
Apparently Speedytinc doesn't know what a 1920 straight through NH carburetor looks like, neither a 1913 Ford aluminum intake. The aftermarket hot air pipe has two circular vanes inside to start swirling the intake air and the internal valve was removed so it is a straight-through pipe. The gas tubing is one size larger than Ford supplied and can easily be replaced as long as the curvatures are replicated from original..... And thanks goes out to Allan and Craig, also to Mark for posting his picture, appreciated.
Re: Holley NH Carb question
Posted: Sat Aug 09, 2025 11:30 am
by speedytinc
Craig Leach wrote: ↑Sat Aug 09, 2025 2:17 am
Hi John, I absolutely love the manifold, dual carbs, vaporizer exhaust. What is that casting? Allan with all that going on you noticed the
cutout?
Craig.
Thanks Craig.
The exhaust casting is a mystery part found on tbay.
Fits the hot plate pattern near perfect. no gasket. I speculated it was from a knight sleeve valve motor or tractor.