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-   -   Piston/cylinder question (http://forums.pelicanparts.com/911-engine-rebuilding-forum/119247-piston-cylinder-question.html)

classic911 07-16-2003 09:17 AM

Piston/cylinder question
 
Will the pistons/cylinders off an "85 Carrera fit my '82 SC. I'm going to be doing a rebuild soon and want the Nikasil cylinders, as opposed to my current Alusil ones.

I don't think there will be a problem but rather be safe ....

Bill Verburg 07-16-2003 01:54 PM

The cylinders will fit fine but the wristpins are different 23mm for the Carrera 22mm for the SC, of course you could also swap con rods....but then you would need to swap crankshafts....

Wayne 962 07-17-2003 02:49 PM

Right - the answer is a flat no on the pistons.

-Wayne

surflvr911sc 07-17-2003 10:18 PM

Short Stroke 3.2?

So does that mean I can buy 98mm cylinders, use 98mm JE pistons, and they will fit fine on my SC case and heads? I thought there was an issue w/ the cylinder to head sealing ring.

Wayne’s book says to use a 3.2 case w/ a SC crank for the short stoke 3.2. I’m confused.

Bill Verburg 07-18-2003 04:09 AM

S/S 3.2 is a 3 liter case w/ 70.4mm crank & 98mm p/c

L/S 3.2 is a stock Carrera w/ 74.4mm stroke & 95mm p/c

3.2 Carrera or 3.0 SC blocks are pretty much the same, there are minor differences like oil drain, the major difference between them is the crank, con rods and pistons(not counting ancillary sysytems like DME, alt etc)

Either block w/ 74.4mm crank & 98mm p/c is a 3.4 liter

Wayne 962 07-18-2003 05:34 PM

3.2 case and 3.0 case are basically identical. You need special 3.2 pistons that have the piston pin bore offset properly. I have the short stroke 3.2 RSR kit sitting right next to me. Cost is about $3500...

-Wayne

surflvr911sc 07-18-2003 06:24 PM

Wayne, you think you can keep that kit hidden for a couple months while I complete a 3.6 conversion and find a car for the 3.0??

What does that kit include, just P&Cs?


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