My first question is about the flow rates of TPI systems. I hear different numbers. What is the stock rating up to for RPMs?
Second question: I am in the process of building a stroked 305, 10:1 CR, World TorquerS/R 305 heads, long tube headers, MSD Ignition, underdrive pulleys, 210/224 with 490 lift LCA 112 cam, 1.6 roller rockers, true dual exhaust with some other fun stuff.
I recently purchased a L98 TPI MAP set-up off of a 88 Corvette with no computer or PROM modifications. It obviously has the 21 or 22 lbs per hour injectors. I just got done reading the "TPI swap gone wrong" and I learned about the problems that he was having. I wanted people's input on how the 350 injectors would work in my engine build up, or any thing else that might be help full. thanks.

 

Im not exactly sure about the flow rates for rpms....but I "think" the LTR intake flows somewhere around 660cfm(correct me if Im wrong).


As for the injectors, Id say since youre adding 30ci to your motor, as well as better flowing heads and a better cam, you should be fine with stock 350 injectors. Just make sure to get them cleaned and flow matched while they arent on the car(so much easier). You mentioned also its a MAP system??? Are you referring to Speed Density? Or the MAF system??? If it is indeed a speed density setup, youll need to learn some tuning to get it to run "right". If its MAF, you can get by with more modifications being that the ECM is less sensitive. Good luck with the stroker.....

 

It is a Speed Density system. How do I go about getting them "cleaned and flow matched?" It originally put out 250 hp stock, so I am hoping it will be OK. My aiming point is 350 hp.

 

From another post by ski-???? in the TPI section.

TPI, stock base, stock runners, 48MM-185CFM
TPI, Accel base, large tubes, lots of porting, 52MM-212CFM
TPI, Accel base (cheater), larges tubes, lots of porting 52MM-226CFM

From this if you have a modified TPI you would want heads that flow around 220CFM at .400 lift and up. Hope this helps, Allen