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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Great news. Could mean 8/1 CR 3.4 or 3.3 C2 Turbo style P&C's.

One of the issues 911 motors for a long time is the differental expantion rates between the cylinders and the head studs that wants to pull the studs out of the case. On top of that it is difficult keeping the heads on the cylinders with the amount of pressure that can come with a turbo.

That has me wondering dose the JB Racing Cylinders with steel liners alow for higher head stud torque values? My thinking is steel cylinders might expand less than aloy cylinder and might be less likly to pull the studs out of the case? On the other hand aloy cylinders may transfer heat faster.

So what is the best practices set up I wonder.
Old 11-14-2009, 08:13 PM
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