Some help with PI swap...

[st4ng07]

Off topic a little. But dont you have to get the valve seals machined in? Ive heard of people changing them and such. I asked one of my friends and he says they have to be machined in?

 

[96gt226410]

The valve seals just sit in place. They're plastic with a rubber ring at the top. The valve seats have to be machined. Well, they should be anyway...

 

[Dalamar]

I've got a question, may be off topic though. For all that have done PI swaps, does your exhaust sound different afterwards? For some reason, PI GT exhausts always sound better than mine does. Does it have something to do with the cams maybe? Thanks...

The exhuast is flowing a lot more air, and has a much better lift on the PI cam or aftermarket than the NPI slugbitches.
more air = better sound

 

[voidfinger]

also the 10.50:1 Cr doesn't hurt either. I can't wait for the sound of mine when i get the pi head and cams on with my o/r prochamber and catbacks. ... :rockyou: