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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269

Aren't you also running more than stock 25 deg advance at cruse?

Seems that should help to.


Originally Posted by JFairman View Post
930 is geared higher in 4th than an SC in 5th... 3000rpm is 80mph, and if you have it tuned to run around 14.9:1 AFR at steady cruise around 70mph you can get around 22mpg, maybe even a little more.

Thats how mine is with a 20% fuel delivery over stock CIS flowtech modified USA fuel head and Brian Leask adj. control pressure regulator, B&B headers and muffler, and 964 cams.

Idle AFR is around 13.5:1 for a smooth idle with 964 cams, and full boost AFR at 6000+ rpm is 12:1
Cold start AFR around 80 degrees ambient is around 10.5:1AFR and raises to warm AFR in about 60-90 seconds. It starts and runs absolutely perfect!
Nice tune!!!
Old 10-14-2010, 02:24 PM
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