Tunnel ram plenum spacer
I made several 1/4" thick with nylon/derlrin spacers and several gaskets to match. We dyno'd it with 1/4" and went in 1/4" increments (+ 2 .020 thick gaskets) each time. Nothing made any considerable difference between the different heights in h.p. or torque. Also tried stacking a couple different 1/4", 1/2", 1", and 2" HVC Super Sucker carb spacers. That difference didn't change much either. It was only a couple horsepower up or the same on each pull. Wound up leaving just a 1/4" plenum spacer and 1/4" carb spacers in.
I made several 1/4" thick with nylon/derlrin spacers and several gaskets to match. We dyno'd it with 1/4" and went in 1/4" increments (+ 2 .020 thick gaskets) each time. Nothing made any considerable difference between the different heights in h.p. or torque. Also tried stacking a couple different 1/4", 1/2", 1", and 2" HVC Super Sucker carb spacers. That difference didn't change much either. It was only a couple horsepower up or the same on each pull. Wound up leaving just a 1/4" plenum spacer and 1/4" carb spacers in.