Thread: carb spacer

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what does everyone think about spacers -- I've got a 1" 4 hole with a rpm performer air gap --402 BB --750 edelb. good or bad

The only way you can tell if a carb spacer works is by trial and error. I personally would say that a open hole phenolic spacer would work best on a performer R.P.M. air gap. Sometime's a four hole spacer screw's up the fuel distribution in a dual plane manifold. But every situation is different. They are cheap enough , play around with them untill you feel you have the right combination . You can pick up a little performance with them. They also keep the carb a little cooler which is always a good thing.

I have done a lot of research on carb. spacers. They are used for improving the atomization of the fuel, it will improve the top end, while loosing bottom end power.Genrally people use them if they have a low rise intake manifold, the rpm air gap intake by Edelbrock is a great intake and may not need a riser.Phenolic spacers also help with heat, somtimes carbs become so hot that the fuel can begin to boil. trial and error is a good idea, but must be done under equal condition, I.E.
outside temps, egine temp, test distance,
fuel type, & m.p.h. on test drive must be the same.

Is your ride a daily or strip vehicle?