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Old October 14th, 2019, 10:02 AM   #1
sallyandsean
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Default Holley 2100 info wanted

Hi guys, just picked one up but not loads over here and very little info online.

Can anyone give me the basics please. I can see how to set the idle and where the main jets are but that's about it.

The choke wasn't opening as it was catching on the little cam on the other side of the carb so I backed the screw right out and now opens freely. What is the little cam and screw for and how do I set it.

Thanks


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Old October 14th, 2019, 08:11 PM   #2
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Default Re: Holley 2100 info wanted

they are holley 94's from back in the day for flathead ford motors. i have several of them and buy them whenever i see them. i have flathead ford motors and use them on vw's too. i like them. they make a lot of power and make your engine a bit louder too. just get a rebuild kit for it and it will tell you what you need to do. if you have a carb rebuilder near by, they can probably get one for you.
https://www.google.com/search?client...100+carburetor
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Old October 19th, 2019, 04:03 AM   #3
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Default Re: Holley 2100 info wanted

Hooked up my fuel line but just over flowing
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Old October 19th, 2019, 06:35 PM   #4
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Default Re: Holley 2100 info wanted

If I understand the problem, it sounds like a problem with the float,or needle and seat. If you’re running an electric fuel pump you might need an in-line pressure regulator. I run one for my 625 Edelbrock set at 2-1/2 pounds.
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Old October 20th, 2019, 07:30 AM   #5
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Default Re: Holley 2100 info wanted

If the carb has been sitting a while and had old gas in it, probably varnished up and made the needle /seat stick or as V8 said, stuck float. Just a quick clean up or at most an overhaul kit should set you right.
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Old October 20th, 2019, 02:06 PM   #6
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Default Re: Holley 2100 info wanted

Cool
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Old October 21st, 2019, 11:36 AM   #7
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Default Re: Holley 2100 info wanted

OK, gave it a clean and it fired up but spat flames out the exhaust. I hadn't hooked up the choke or blocked the heat risers from the exhaust.
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Old October 21st, 2019, 07:53 PM   #8
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Default Re: Holley 2100 info wanted

sounds like timing or maybe a vacumm leak at the head.
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Old October 21st, 2019, 11:42 PM   #9
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Default Re: Holley 2100 info wanted

Timing and heads fine as running perfectly on carb I just took off.
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Old October 22nd, 2019, 04:21 AM   #10
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Default Re: Holley 2100 info wanted

Flames out the exhaust are generally a sign of running too rich. Exhaust leaks could also cause a backfire through the exhaust. If those heat risers are open, try blocking them off and see if it gets better.
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Old October 22nd, 2019, 10:08 AM   #11
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Default Re: Holley 2100 info wanted

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Originally Posted by kustomkreep86 View Post
Flames out the exhaust are generally a sign of running too rich. Exhaust leaks could also cause a backfire through the exhaust. If those heat risers are open, try blocking them off and see if it gets better.
Also didn't have the air filter on so maybe that wasn't helping. Just ordered a mushroom style filter.
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Old October 22nd, 2019, 10:12 AM   #12
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Default Re: Holley 2100 info wanted

This is it on the car. Had to cut the single port manifold but seams to have sealed OK.




upload image
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Old October 22nd, 2019, 10:32 AM   #13
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Default Re: Holley 2100 info wanted

Also, where should the Fast idle screw be set as its backed right out but if I screw it in it stop choke opening.
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Old October 22nd, 2019, 12:06 PM   #14
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Default Re: Holley 2100 info wanted

Not having the heat risers functioning could cause a rich condition as well. Without the heat riser heating the the intake runner, the fuel can't atomize properly. When the engine is running, the intake directly under the carb gets super cold. I ran into that problem with a plugged heat riser tube. Mine was like ice cold. The cold air will cause the fuel to become dense and make big droplets rather than nice vapor of fuel.
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Old October 23rd, 2019, 05:00 AM   #15
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Default Re: Holley 2100 info wanted

Quote:
Originally Posted by kustomkreep86 View Post
Not having the heat risers functioning could cause a rich condition as well. Without the heat riser heating the the intake runner, the fuel can't atomize properly. When the engine is running, the intake directly under the carb gets super cold. I ran into that problem with a plugged heat riser tube. Mine was like ice cold. The cold air will cause the fuel to become dense and make big droplets rather than nice vapor of fuel.
I have a 12v manifold heater I'm going to fit to cure this. I have had it running but can't figure out how the fast idle cam is supposed to be working or what position to the screw to it should be.
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Old October 23rd, 2019, 05:09 AM   #16
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Default Re: Holley 2100 info wanted

This is its first start up

https://youtu.be/Xzi4BNIRMCA
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Old October 23rd, 2019, 09:51 AM   #17
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Default Re: Holley 2100 info wanted

This is how it is now but not sure if correct



sicbo online casino
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Old October 23rd, 2019, 04:40 PM   #18
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Default Re: Holley 2100 info wanted

Only problem I see is the hose is gonna rub the pulley... Looks like it runs nice from the Vid though...Considering.
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Old October 24th, 2019, 04:05 AM   #19
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Default Re: Holley 2100 info wanted

I have moved the pipe now. I haven't made a support bracket for the carb yet but if I push the carb with my fingers the car stalls.
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Old October 24th, 2019, 09:15 PM   #20
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Default Re: Holley 2100 info wanted

Engine sounds good. Once you ‘fine tune it she’s going to be a great ride. 👍
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Old October 25th, 2019, 12:01 AM   #21
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Default Re: Holley 2100 info wanted

Quote:
Originally Posted by V8Transporter View Post
Engine sounds good. Once you ‘fine tune it she’s going to be a great ride. 👍
How do I fine tune it. At the moment it's a little rich but can't figure out how to lean it out.
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Old October 25th, 2019, 05:04 AM   #22
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Default Re: Holley 2100 info wanted

Quote:
Originally Posted by sallyandsean View Post
How do I fine tune it. At the moment it's a little rich but can't figure out how to lean it out.
Yeah sounds like it's running good from your video. For the fine tuning you can start with the idle mixture screws. That's the first and easiest place to start. If you're still too rich after that then you need to start looking into jets and all that fun stuff in the carb.

I've never had the chance to play with one of these carbs, and I'm not sure if the procedure is the same, but this procedure applies to most idle mixture screws.

Warm up the engine and make sure the choke is fully open. Hook up a vacuum gauge to manifold vacuum.
Turn off the engine.
Turn both idle mixture crews in until they lightly bottom out.
Turn each one out one and a half turns. It it won't start and run, turn the mixture screws out more. Make sure you do the same amount for each screw.
Start the car back up and set your idle speed using the idle speed screw.
Adjust the idle mixture screws the same amount, I usually start with half turn on each one, until you have the highest vacuum you can get.
Then readjust your idle speed with the idle speed screw.
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Old October 25th, 2019, 07:17 AM   #23
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Default Re: Holley 2100 info wanted

Quote:
Originally Posted by kustomkreep86 View Post
Yeah sounds like it's running good from your video. For the fine tuning you can start with the idle mixture screws. That's the first and easiest place to start. If you're still too rich after that then you need to start looking into jets and all that fun stuff in the carb.

I've never had the chance to play with one of these carbs, and I'm not sure if the procedure is the same, but this procedure applies to most idle mixture screws.

Warm up the engine and make sure the choke is fully open. Hook up a vacuum gauge to manifold vacuum.
Turn off the engine.
Turn both idle mixture crews in until they lightly bottom out.
Turn each one out one and a half turns. It it won't start and run, turn the mixture screws out more. Make sure you do the same amount for each screw.
Start the car back up and set your idle speed using the idle speed screw.
Adjust the idle mixture screws the same amount, I usually start with half turn on each one, until you have the highest vacuum you can get.
Then readjust your idle speed with the idle speed screw.
Cool, thanks
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Old October 27th, 2019, 07:14 AM   #24
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Default Re: Holley 2100 info wanted

Great explanation KK !
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