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andrew15's Avatar
 
Join Date: Jul 2001
Location: Thunder Bay, ON
Posts: 4,547
90mm Euro P&Cs = 90mm RS P&Cs?

Quick question:
I've heard a few different descriptions and they all seem to describe the same item.
Are 90mm Euro, Euro S, and RS P&Cs all the same item? ie 8.5:1 compression flt top pistons w/ Mahle nikasil cylinders?

Thanks,
Andrew M
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1970 911E - track / weekend car
1970 911S - under restoration
1986 930 Slant Nose - fun car

Current used parts for sale
Old 01-30-2006, 07:58 PM
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Andrew:

Differing nomenclatures makes discussions of such subjects truly confusing,....

Perhaps I can help clarify things. There are now 3 different Mahle 90mm P/C sets:

1) 90mm CIS P/C's; 8.5:1. These are Nikasil cylinders with cast pistons and CIS optimized domes.

2) 90mm RS P/C's; 8.5:1. These are Nikasil cylinders with forged pistons and double valve relief domes made to clear "S" cams.

3) 90mm RSR P/C's; 10.3:1. These are Nikasil cylinders with forged pistons, double valve relief domes, and were originally made for SCCA/IMSA racing. These are now quite rare.

References to "Euro" & "Euro S" in describing these parts are difficult to clarify since the language used to describe these components becomes obfuscated.
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Old 01-30-2006, 11:07 PM
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Thaks Steve - Euro and Euro S is what had me all confused - I've always refered to them as RS and someone was asking me for 'Euro S' versions. For the 8.5:1 versions, I guess it all comes down to CIS dome or not.
Regards,
Andrew M
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1970 911E - track / weekend car
1970 911S - under restoration
1986 930 Slant Nose - fun car

Current used parts for sale
Old 01-31-2006, 05:55 AM
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