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> 4 bbl on a 914-2.0?, Interested in mounting a 4 bbl carb on a 914-2.0!
Txgasser
post Dec 1 2008, 09:06 AM
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Has anyone in the group ever mounted a 4 bbl carb on a 914-1.8 or 2.0 before? If so how did it work out?

Thanks,
Johnny!
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VaccaRabite
post Dec 1 2008, 09:24 AM
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Everyone using twin webers has 4bbl carbs....

I know, not what you meant.

You will have the same basic drawback of any progressive carb on our engine. The intake runners are too long and the gas vapors re-solidify before they can be burned.

Zach
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davep
post Dec 1 2008, 10:13 AM
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QUOTE(Txgasser @ Dec 1 2008, 07:06 AM) *

Has anyone in the group ever mounted a 4 bbl carb on a 914-1.8 or 2.0 before?

If you are talking about something designed for a Detroit V8, then no it won't work. You would get no velocity through the carb, the gas would puddle, and the engine won't run worth anything.
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Jake Raby
post Dec 1 2008, 12:54 PM
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The long runners and a center mounted carb are horrible to tune on a 4 cyloinder engine. The fuel builds droplets as it falls from suspension in the super long runners.. It always runs rich.
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Txgasser
post Dec 1 2008, 01:15 PM
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So much for that idea!
I guess i'll stick with 40's or 44's! (IMG:style_emoticons/default/idea.gif)

Thanks,
Johnny!
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VaccaRabite
post Dec 1 2008, 01:57 PM
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Go with dual 40s. You can make 44s work (I am) but they are really a bit big for a 2.0 - even a hot one.

Zach
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marks914
post Dec 1 2008, 02:38 PM
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Holley has some 390 CFM carbs with pretty small primaries

mark
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Dr Evil
post Dec 1 2008, 09:13 PM
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I am using a holley 390 on my 3.1L /6 corvair motor. It is workable, but it would be pretty big for a 2.0 from what I have seen.
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Brett W
post Dec 2 2008, 11:38 AM
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There is a guy here in town that has built a manifold for a holley four barrel on a 3.0 Six. I have never talked to the guy but his kid called me up and was telling me about it. How he never could get it to run right with the CIS and that his daddy works for NASA and can get anything made. So apparently he has made this manifold.

I told him his dad was a dumbass and didn't understand the physics of the problem he is creating. Oh well. Stupid people will learn.
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Txgasser
post Dec 2 2008, 11:41 AM
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Morning, Brett!
It was an idea, but I think i'm going to stick with a pair of 40's!

Thanks,
Johnny!


QUOTE(Brett W @ Dec 2 2008, 09:38 AM) *

There is a guy here in town that has built a manifold for a holley four barrel on a 3.0 Six. I have never talked to the guy but his kid called me up and was telling me about it. How he never could get it to run right with the CIS and that his daddy works for NASA and can get anything made. So apparently he has made this manifold.

I told him his dad was a dumbass and didn't understand the physics of the problem he is creating. Oh well. Stupid people will learn.
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Brett W
post Dec 2 2008, 12:18 PM
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Ideas won't screw you. Its acting on that idea that will get you in trouble. Good luck with your project.
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futuresoptions
post Dec 2 2008, 01:31 PM
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Took the CIS off my 911 and did this.... drove it around with no problems... If I was going to try this on a 914, I would probably go with a 2bbl and jet it down...


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Brett W
post Dec 2 2008, 01:56 PM
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And I have walked around in the rain without an umbrella. But Why? CIS ain't rocket science. It is simple mechanical FI with no complicated parts. It is much better than any center mount carb.

The factory designed the intake manifold to flow air only. It was not designed to maintain fuel in suspension. You absolutely lost performance over the stock CIS. Unless, you consider it an improvement over a non running CIS car, I guess.
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james2
post Dec 2 2008, 03:51 PM
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(IMG:http://laspoliticas.files.wordpress.com/2007/10/confused.jpg)
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zymurgist
post Dec 3 2008, 05:46 PM
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QUOTE(Brett W @ Dec 2 2008, 02:56 PM) *

CIS ain't rocket science.


Maybe that's why the NASA guy is having a hard time with it.
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andys
post Dec 3 2008, 06:26 PM
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Not here to question which is the better performing system, but for years before EFI, etc, center mounted carbs were used on flat motors everywhere. In the late '60's, we ran a G Prod Corvair in SCTA with a center mounted 4 barrel. It was indeed very fast (only 2 MPH off the record the first time out). Race car it was, but throttle response was fantastic (It was one of the things that stuck in my memory) even with those long runners.

Back in the '70's when my '73 2.0 914 left me stranded on several occasions (there simply wasn't the knowlege of EFI then), I adapted a small single barrel card to get me going. Worked fine (meaning reliably) until the Weber 40's arrived.

Andys
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scotty b
post Dec 3 2008, 06:38 PM
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how about running DUAL quads ?? You know, one four barrel on each side ??? (IMG:style_emoticons/default/slap.gif)
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