pistons 90/92 mm? CR 1:10-10.5 x 66 stroke, "S" heads..Sorry my ignorance..

[dan67]

hallo!Sorry my ignorance...I did not understand such as pistons for my project engine....some say "the 90/92 P&C ( high dome or not..) RS or RSR runs perfect with 66 stroke with cr 10.3-5" but this configuration its for 70.4 stroke...Brand?(Qsc-Nik-Mh...)
I search:
-pistons 90/92 mm
-CR 1:10-10.5
-66stroke
-"S" ported heads
-MFI injection
-dual plug
-cams?
Thanks!
and sorry for my poor english
danilo
Italy

[YTNUKLR]

I think you wanted the Mahle RSR 92mm? Originally made for a 2.8, with 70.4mm stroke. they work with the 66mm crank and make 10.5:1 or so.

[Steve@Rennsport]

Originally Posted by dan67

hallo!Sorry my ignorance...I did not understand such as pistons for my project engine....some say "the 90/92 P&C ( high dome or not..) RS or RSR runs perfect with 66 stroke with cr 10.3-5" but this configuration its for 70.4 stroke...Brand?(Qsc-Nik-Mh...)
I search:
-pistons 90/92 mm
-CR 1:10-10.5
-66stroke
-"S" ported heads
-MFI injection
-dual plug
-cams?
Thanks!
and sorry for my poor english
danilo
Italy

Hi Danilo,

Both 90mm high-compression and 92mm (RSR) pistons work very nicely with a 66mm crankshaft yielding either 2.5 or 2.6 litres. I've done lots of these since 1976,..

I don't have any 90's, but I do have one new set of Mahle 92mm RSR P/C's if you need them.

[dan67]

perfect! doubt spent!
thanks All!