The best shape of intake/exaust port??

[tha_SwEdE]

How should it look like for turbo/sc use??
Would be nice with some pics

[TurboGTU]

RE: The best shape of intake/exaust port??

If you mean the head ports...see pushrod discussion on head porting a few threads down. Manafolds of simmilar flow are required. The charge pipes should idealy be no smaller than the TB and limit the amouts of sharp turns it has to make. On exhaust..each bank cannot be smaller than 1/2 of the turbo flinge beeing used..but not bigger than the flinge used. On SC..a header desighn is desirable. Sorry.. but no cross over pipe between the headers can be used since pulses will be unequal on a transvers setup. Leave them seprate. Your ears will thank you.

I still need to work on my charge pipes on my setup. It makes too many turns. All the pipe lenth is about 15+ feet! Though I get 5-6psi by about 2500 rpm on a IHI GM-8 turbo on my 3.1. Torque steer is horrible at those rpms though..LOL.