T.N.A.C.C.B.P.P. EQ360

yellow rose said

Jim, how much height did you add to the plenum with that spacer? I usually weld mine up but I know I could use some more plenum.

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I used a .750" plate and set .450" of it into the plenum and it raised the carburetor .300". If I ever do this again, I will use a 1" plate and raise the front of the spacer an additional .250"-.300" so that the carburetor sits level on the manifold and is not tilting forward. It'll mean I have to realign the carburetor mounting bolts to set perpendicular to the altered surface, but that is why God made heli-coils.

Of course I'll be testing the 2" HVH Super Sucker spacer also. So far every engine I have used the 2" on has made more power over the entire rpm range.