OK so i put a 355 into my camaro a while back and for some reason it just doesn't seem to crank out much power...i have a 9:1 compression and i believe its a roller (spelling), it also has a basic 14x3 element with a k&n high flow, its got an aftermarked edle. intake manifold, and its a tbi, i know its history and its got aftermarket heads. it used to be my uncles friends and he was suprised that i couldnt even light the tires up. he knows it has WAY more than that in it he told me it was turnin his car easy...im not a car expert by any means it just seems weak i still am runnin a 305 everything else like the chip and everything and stock exhaust. but i have a pair or headmen longtubes and a true dual with h-pipe and moroso's coming in soon when weather breaks. something just doesnt seem right when my buddies impala with a v6 is beating my car i take care of it and everything. any thoughts?

i really just come down to being stumped because my lack of knowledge im expecting the exhaust and headers to help seeing as im using the stock 305 system but do i need different injectors will a tune do it i mean whats my best bet here im tired of getting beat by crappy mustangs, or am i just expecting to much

Sorry for any spelling errors

 

Assuming everything is ok with the engine and the associated parts (exhaust, gears, etc.), then it sounds like you really need to get into tuning.

 

You need to run a 350 ECM with chip for a 350 not 305 big difference between the 2. Change that and I bet you will see a big gain in power.

 

That is a start, especially since I think the sensors and some stuff are different between the 305 and 350.

But with your aftermarket mods, you will need to tune. Look into getting the EBL it will make your life easier. PM RBob baout it.

Also, getting headers, and a good high flowing exhaust and mufflers will probably do wonders. The stock exhaust chokes my 305, a 350 needs better exhaust.

 

ECU is a 8746. No need to swap it. You need a correct knock sensor. You need a "corrected" chip.