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Carb Spacer

minifridge1138

Well-known member
Joined
Feb 2, 2007
Messages
908
Location
USA
Corvette
1982 Black Fastback
Just out of curiousity...
What do people think about carb spacers?

Is this a waste of money, or a "free" horsepower gain?

Good Luck!
 

yellow77

Well-known member
Joined
Jun 17, 2004
Messages
184
Location
Tulsa, OK
Corvette
1977, Bright Yellow
I have a 3/4" spacer under my holley on the dual plane manifold which came with the ZZ4 crate engine. The spacer is the plate for the nitrous system. I have a drop base open element air cleaner with a 3" tall filter element, and I have no hood clearance issues at all. A four hole spacer will help to straighten out the air flow, especially on the "short" side of a dual plane manifold and will help with throttle response.
If you are concerned, try it, place some 1" tall play dough pyramids on top of the air cleaner, carefully close the hood, then open it and see how far they have been compressed, that will tell you if there is an interference issue.

Hope this helps

Cheers

Richard
 

Brooklinite

Well-known member
Joined
Oct 20, 2006
Messages
57
Location
Ontario
My '72 LT-1 has a 1/4" spacer. With the stock Holley and intake there are no hood-clearance issues, however the air cleaner base interferes with the ignition shielding. I thought it was a PO add-on but apparently the NCRS judging guide shows it's correct for 71-72 LT-1's.
 

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