week top end after pi swap.

[Z28EATR]

My buddy and i just did a pi head and intake swap on his 98 gt. Well on the lowend it seems like it pulls pretty good but when he hits third the car just doesnt seem to pull like it should.

He raced an 01 stock gt on the highway and they would kick it down from second and my buddies car would pull away but when he hit third the 01 would start to pull and walk right by him.

I know the comp ratio in my buddies car should be around 10:1 now and i heard from other guys with the swap that they can eat the stock gt's up. He is running the stock injectors still, but i had him run it hard and shut if off and pull a plug and it looks great.

also there are no codes and no check engine light.

any help or advise is appreciated.

his other mods include cold air and cat back exhaust.