Using 964 RSR 3.8 Pistons and Cylinders with Stock Heads and Crank
02-17-2006, 07:31 PM
#16
Rennlist Member
Thread Starter
Unless I get a compelling reason otherwise, I think the purchase of the "rare competion RSR" pistons in 3.8 is going to happen. Here we go! Now to get the engine parts, case machined, heads worked, etc etc.
Cool
Cool
Last edited by cbracerx; 02-19-2006 at 11:56 PM.
02-20-2006, 01:00 PM
#18
Rennlist Member
Thread Starter
What is the conventional wisdom on the pin offset issue? Some folks are suggesting that the pistons need to be machined to permit one side to be flipped over so that there is no issue with reaching TDC at the same point on each bank.
02-20-2006, 01:25 PM
#19
Nordschleife Master
There is so little net dome volume in the RSR pistons that if you machine the exhaust valve pocket to the same size as the intake valve pocket so that you have the proper piston to valve clearance when rotating the piston 180 degrees you'll loose too much net dome volume and the associated compression ratio. I wouldn't do it.
The issue is not with reaching or not reaching TDC, it has to do with minimizing the piston rock in the bore with the short rod/stroke ratio the Porsche engine has.
The issue is not with reaching or not reaching TDC, it has to do with minimizing the piston rock in the bore with the short rod/stroke ratio the Porsche engine has.
