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Steve@Rennsport Steve@Rennsport is offline
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Join Date: Jul 2001
Location: Portland Oregon
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Just another note on those 92's,....

The piston domes are made for the 72cc 2.8 RSR heads. Using these in any 2.2, 2.4, or 2.7 that have the 66cc-67cc chambers will give an approximate 11.2:1-11.3:1 CR at .040 of deck height. Caveat Emptor on using these in a street engine. Its possible to get the CR down to 10.5:1 but it takes a lot of work.

These newer cylinders differ from the original RSR ones by the deletion of the CE ring groove. These do not use any head gasket. That eliminated the cracking problem at the tops of the bores.
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Steve Weiner
Rennsport Systems
Portland Oregon
(503) 244-0990
porsche@rennsportsystems.com
www.rennsportsystems.com
Old 02-25-2005, 07:57 PM
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