Thread: Make a GT into a GTP, p.i.t.a. ? Anyone do it?

Originally Posted by BwolfGT

Yep. And after some of fastkatt's tuning I've got zero knock most of the time. SOMETIMES I see .5*. 3.8 pulley. Some say to do 4.0, but from what I've seen that's not necessary at all.

Well do you have headers? Full exhaust to me means yes.

Just curious as to the average pulley size people tend to run with a top swap and headers.

Originally Posted by Bio248

i ran a 3.4 right away on my cammed top swap. never knocked ever.

Headers I take it? Regardless, that would be an insane boost from the GT.

Originally Posted by BwolfGT

No I don't have headers. The average I think is 3.8.

Yeah, after seeing what happened to kfish just wanted to get an idea to see what most have to do to run what.

My friend has his stock s/c still cuz he used a turbo, I wonder if I should put the s/c on the GT...

Originally Posted by Bio248

yes. i had headers. the only time it knocked was after i spun the bearing. then it knocked when it was idling. haha.

Spun bearings... I've heard that before, common cause?