Hello all. First off, I have tried searching for this questions but could not find any answers. I have an 87' 6 port that I am rebuilding. I was planning on putting a very aggressive street port and turbo rotors. Is this enough to run higher boost like you can in a 4 port? I plan on running all supporting mods for the boost, but I don't want to waste my time if I can only run 6 or 7 pounds of boost. Thank you in advance.

 

dont see why u couldnt seein how its now a low compression motor

 

PSI (boost) means nothing to us without telling us your turbo choice. 8psi on stock turbo is not the same as 8psi on a T04Z.

 

I dont see why you want to waste your time on the na engine in the first place.* If power was your goal, why not just start off with a TII motor?

 

Should be obvious but yes you can run high boost since you are using low compression rotors...Other drawbacks to using a 6 port include limitations in intake porting (ported 4 ports will outflow ported 6 ports), the fact that you can't port exhaust ports because of the diffuser and unideal port timing for forced induction.

 

Most "very aggressive" street ports on 6 port engines make so little torque at lower RPMs that the car ends up slower. My suggestion is to leave the intake ports alone aside from opening them up a bit sooner and smoothing them out. Then port the exhaust up a few MM. This will reduce low end slightly but pick it up as the RPMs increase and boost starts to flow.

Define "higher boost". From what turbo?