LT1-7

Finally, it's back up and running. I just ported the exhaust side out 1/8". Exhaust sounds the same. I reach 14psi at 4K rpm's in 4th, and 4300 in 3rd. Alot better than 5500rpm's when I didn't port them. No power increase but sure does takes alot of lag out. I actually ran my car today at 12.88 on a lean 14psi, pump gas. I'm pretty pissed. Hopefully some tuning and I should be in low 12's.

MOBoostFriendly

Who did you have do the turbo porting work?

Just curious, what mods you have?

ErnieT

iTrader: (2)

Porting helped me alot too. Im reaching full boost at just under 4k.
Ernie

Scorpio

Can you tell me more about which parts of the twin turbo assembly were ported and how that helps reduce spool up time? Who did the work for you?

(I'm not doubting it, I just want to understand it better to determine if I should do it too :)

Thanks for any info...

LT1-7

I did the porting myself. I only ported the exhaust side, and the exhaust manifold. I didn't port the exhaust side where the exhaust wheels are. I didn't port them to make them bigger, just to make a smoother path. Seems to work very well cause I get boost creep now. It's all cured from a pop off valve though. Wierd thing is it still gets up to 7psi slow but from there it shoots up to 14 within 500rpm's if I can remember right