cbuczesk Posted June 13, 2005 Share Posted June 13, 2005 Are the stock turbo pistons forged or cast? I have very low compression (50-112psi) in cylinders 1, 5 and 6 and decided to do a rebuild. After removing the head I discovered that someone installed flat top pistons. I'm trying to decide if I should go with: a) current flat top pistons and a thicker head gasket +1mm turbo pistons c) +1mm flat tops with the thicker gasket d) something else Engine specs: F54 block, P90A head, stock crank and rods, ported intake and exhaust, 60mm TB, T3/T4 turbo, intercooler, 370cc injectors, 300ZX ECU, MSD 6AL, etc. Chuck Quote Link to comment Share on other sites More sharing options...
fl327 Posted June 13, 2005 Share Posted June 13, 2005 stock turbo pistons are cast. I would get pistons designed for the cr you are looking to obtain. Quote Link to comment Share on other sites More sharing options...
Thumper Posted June 14, 2005 Share Posted June 14, 2005 If you are going to keep the boost under 18psi the stock turbo pistons should be good. Only problem is putting a piston machined for another block into your block. I would recommend custom pistons to take full advantage of your setup. Quote Link to comment Share on other sites More sharing options...
cbuczesk Posted June 14, 2005 Author Share Posted June 14, 2005 I doubt if I'll take it to 18psi. This project is about done. I have a bunch of other cars to restore and I'd like to have some fun with the Z over the summer. Actually, I thought it was done with this car till it started smoking heavily out the valve cover and crankcase breather. For a few days there were no bugs between Chambersburg and Beaver Springs Dragway! Oh, well. This was a rebuilt engine but I think the PO hammered on it before he sold it to me and then I accidently set the boost to 15+psi the night before the drags. That did it. Does anyone have any links for custom pistons? Approx what do they cost? Chuck Quote Link to comment Share on other sites More sharing options...
Clifton Posted June 14, 2005 Share Posted June 14, 2005 If you need a few turbo pistons to replace your flat tops I have a partial set. A thicker HG will advance your timing, favoring low end. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.