This is a great thread, I didn't think TPI's were capable of making those types of gains with just bolt ons. You said no to headers though, right? Keep it up great thread.

vette throttle bodies say Tuned Port Injection on them. The only difference in the runner is the rough casting on the outside.

OK everyone last pull of this testing was made today. Temp 71 Hum about 68% corrected numbers went down by 2Hp to 242Hp TQ went down by 2 points as well. NOT a good day at the dyno. Plugs and no A.I.R. pump didn't do a thing. I would say 2 points is in reason with different days. So there you have it. A good amountof $$$ was spent in mods and testing but the info was worth it, I think. I know that before the first bolt was turned, from a standing start the rears would break lose pretty good but before 2nd gear they would be "hooked up" now I'm all over the road and 2nd gets a good chirp. This has been fun and I hope it has answered some questions for you as well. How many of us has read in some advertisement about 15-20 easy HP and thought I wondered if it's true...Well now we know what works and what doesn't.... Robin