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Tilikum Turbo Tilikum Turbo is offline
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Join Date: May 2010
Location: Los Angeles
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The factory 3.3L with very low compression ratio cannot run reliably past 0.8 Bar.

A compression ratio of 9.3:1 will greatly limit the boost, so @0.5, that sounds about right.

Are you doing anything to your clutch package to take up that additional Torque? The standard 5-Speed 915 tranny was too weak for a 245HP 1975-77 3.0L Turbo, hence the standard 4-speed on the 930 until much later, when they went to a 5-speed.

Good luck!
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1983 911 3.3L Turbo(YES, I know the turbo badge is on the right...had to be different!)
1996 Toyota Corolla(der 'clapper')
Old 03-24-2011, 07:50 PM
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