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-   -   Pistons Change (http://forums.pelicanparts.com/911-engine-rebuilding-forum/272047-pistons-change.html)

JLF911 03-17-2006 09:07 AM
Pistons Change
 
I have a Porsche 911 Sc 1982. I want to change Pistons 9.3 to 10.5 compression. Can I use 93 oct. gasolie with compression 10.5?

Steve@Rennsport 03-17-2006 10:18 AM
Jose:

Nossir,.....93 octane gas with 10.5:1 requires twin-ignition.

Henry Schmidt 03-17-2006 11:08 AM
I whole-heartedly agrees.

With the CIS injection that came with the 82 SC 9.3:1 is almost too high.

10.5:1 on 93 octane is dreaming even with twin plug
(but so many of us have these kinds of dreams).

http://forums.pelicanparts.com/uploa...1142626288.jpg


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