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NoDOHC · 11-11-2009, 11:51 PM

rotor housings are cheap.

I want to do a semi-pp, leave the primary ports alone (they close pretty early) and fill the secondary ports, then connect a throttle plate for the two primary runners (I was going to use part of a TII manifold). Each of the peri-ports gets an ITB that feeds the port directly. A progressive throttle linkage will allow the engine to only run on the primary ports until about 30% throttle, at which time the P-ports will start to open.

I think it will work very well. If you don't try it, I intend to. I have the utmost confidence that you can do the project justice.

11-11-2009, 11:51 PM	#76
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	rotor housings are cheap. I want to do a semi-pp, leave the primary ports alone (they close pretty early) and fill the secondary ports, then connect a throttle plate for the two primary runners (I was going to use part of a TII manifold). Each of the peri-ports gets an ITB that feeds the port directly. A progressive throttle linkage will allow the engine to only run on the primary ports until about 30% throttle, at which time the P-ports will start to open. I think it will work very well. If you don't try it, I intend to. I have the utmost confidence that you can do the project justice. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)