[Mike Davis]

Cleaning the shop area last night found a 9/16" UHMW spacer that I ran on the Gutsram intake. Due to height limits in a stock chassis/hoodline car I used a flat aluminum top for the AFB's. The spacer went between the intake and top for more plenum volume. With the spacer I picked up almost a tenth.
I have also found with both intakes a Shear Plate under the carbs is worth about a tenth,

[RBAILEY]

Originally Posted by Mike Davis

Cleaning the shop area last night found a 9/16" UHMW spacer that I ran on the Gutsram intake. Due to height limits in a stock chassis/hoodline car I used a flat aluminum top for the AFB's. The spacer went between the intake and top for more plenum volume. With the spacer I picked up almost a tenth.
I have also found with both intakes a Shear Plate under the carbs is worth about a tenth,

Thanks Mike. That's good info, re the spacer and the shear plates. Even with a 6 inch cowl hood, the Gutsram on top of KRE HPs leaves very little room for any type of air filter arrangement ...mainly the front carb is the problem as the hood is lower there. Lots to experiment with. I want some shear plates that vector each carb barrel to its respective port opening in the plenum. That barrel/port alignment aspect on the Gutsram is terrible with the smaller 4150 flange with each bank having an end intake manifold port that looks like it might not get its equal share of air/fuel from the carb. Tempted to go really old school and mount carbs at an angle; if were not for having come up with new linkage .

And btw, I never knew what shear plates for a carb were. Thanks to you and google I do now and they look like something to experiment with

[RBAILEY]

It probably would have been easier to tap and drill the heads but once I realized how thick the port wall at the flange end was I decided to remove the material from the manifold and make room for standard bolt pattern outer bolt holes. Now the manifold will bolt to standard pattern non-wide-port heads without drilling and tapping new bolt holes in the head