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intake manifold/ carb question

Posted: November 17th, 2013, 11:31 am
by jmattox
Thanks to a friend I have a really good engine, but I feel it is asthmatic due to intake manifold and carburetor. Any "inexpensive" way of "improving" the flow on my manifolds. Thanks,

John
FV42

Re: intake manifold/ carb question

Posted: November 17th, 2013, 9:28 pm
by Dietmar
John:

First find out what you have.

Flow tests on carb/manifold combinations are not expensive.

Dietmar
http://www.quixoteracing.com

Re: intake manifold/ carb question

Posted: November 18th, 2013, 9:49 am
by jmattox
Next race is in 2 weeks, not enough time to "improve" for that. I will send manifold and carb for flow testing to you after Turkey Trot. Any suggestions on improving flow that I might be able to do myself? Thanks

John

Re: intake manifold/ carb question

Posted: November 18th, 2013, 12:47 pm
by Dietmar
John:

Unfortunately, no. There is little that you or I can do to improve flow on a manifold. That is something that I leave to a select few.

We'll assume that the carb is jetted correctly. That will definitely affect HP .
Make sure that the gasket under the carb has a larger hole than the manifold- carb itself. Some gaskets are too small. Also be sure that you are NOT using the stock intake gaskets- they crush and will reduce flow. Use hard copper or Teflon gaskets at the head.

Dietmar
http://www.quixoteracing.com

Re: intake manifold/ carb question

Posted: November 18th, 2013, 1:08 pm
by hardingfv32-1
jmattox wrote: Any suggestions on improving flow that I might be able to do myself? Thanks
You can learn to acid etch the manifold for yourself. I would be glad to provide info on the process. You will need a couple of cores and 40-120 hrs of time to get the process down.

Brian

Re: intake manifold/ carb question

Posted: November 18th, 2013, 5:27 pm
by brian
If you have access to a glass bead maching a good internal cleaning will help vertually all manifolds since they're prone to rusting. Be sure to rinse out the manifold with brake clean afterwards. If the carbs are crudy, a bit of spray cleaner down the throat can't hurt either.

Re: intake manifold/ carb question

Posted: November 24th, 2013, 10:21 am
by jmattox
hardingfv32-1 check your PM

John