twilsonx

I've heard some of you guys talking about shaving .080 off the head of a P90 and putting 75-78 valves on it and shimming the cam tower and valve springs. I just bought a P90 to put on my '78 L28 and i'm keeping it N/A so I am looking to raise the compression rating. I need to know what all is involved before I get it done to mine. Here's the link to the site where I first heard about the P90 modification. http://datsunzgarage.com/p79/ A few particulars questions I had- Where do I buy cam tower shims? Has anyone used the Arizonezcar SS valves? are they worth it on a N/A car?

I have a N47 in my 280Z right now, I'm looking to either get a P90 or get some head work done to the one I already have. Do you think that with the right porting I can get similar results with my N47 or should i try to find a turbo head? I already have a header for my N47, so keeping that would be a plus.