PI head swap vs NPI cam swap

AZmustang98:

I have NPI heads, Comp Cams (Nick didn't make cams when I bought mine), and a PI intake. I have no idea how much power the engine makes now compared to the old engine but the seat-of-the-pants difference is huge. My GT is a garage queen (I just like to tinker, I guess) and she's never has been to the track. I'm not looking for huge power. I am quite delighted with the power level I have now although I sometimes think about adding TrickFlow heads.

You can search here and on other forums but here is a summary of NPI to PI improvements: PI intake = 30 hp, PI cams = 15 hp, and PI heads = 10 hp. Now, if you port the PI heads then the power improvmeent is significantly increased. Swap the PI cams for aftermarket cams and power improves significantly. It's only money, lol. So, you need to set some goals for your car and then you will know what you have to do.

HTH,

Chris

want to sell your pi heads?

I have a pi swaped 95 tbird 10.1 compersion with a tune for 93 oct. If i want to run 87 i just pull a plug under the hood that pulls two degrees of timing and it runs fine and pulls hard. So if you get the right tune you can run the PI heads and cams with 87. I wouldn't stick to the npi.

Its a hand full... But get all ur parts together frst then tackle it..i made the mistake to tear down before heads were back from shop an well the shop i sent them too isnt the brightest..