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JMA-RUF JMA-RUF is offline
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Join Date: Dec 2005
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Originally Posted by jcc911 View Post
If the Turbo Carerra had 7:1 C/R, and did not use an IC, what was the CR underboost?
FYI, the non-intercooled, 3.0L Turbo Carrera ran a 6.5:1 C/R. Compression was increased to 7.0:1 on the 3.3L intercooled motors from 1978 onwards.

A lot of tings come into play here, such as fuel quality (octane rating), intercooler efficiency and proper tuning.

A 3.2 Carrera can run a safe 10psi/0.7bar of boost at the stock 9.5:1 C/R with appropriate fuel delivery, ignition timing and intercooling.
Carrera TT

(3.3, Protomotive MAP ECU, EFI, GT2 EVO CAMs, Twin Plugged, Twin Turbo's)
Old 02-21-2009, 02:23 PM
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