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Old 06-04-2008, 03:13 PM   #336
B.S.F.C.
Scooby Newbie
 
Member#: 161754
Join Date: Oct 2007
Chapter/Region: TXIC
Vehicle:
2004 STi
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It would be great if the following is added when members post there dyno results:

Injector Size
Base fuel pressure
Injector Duty Cycles at the time of the run.

Possible HP delivery can be fairly accurately calculated with theses figures and members can use this to check the validity of there tune or dyno results.

Example:

An 850 cc injector on a STI at 80% duty cycle and 45 PSI base fuel pressure can support 108 flywheel HP per injector or 432 flywheel HP or 432*.73 = 315 HP to the wheels.

The same 850 cc injector at 100% duty cycle and 55 PSI base fuel pressure can support 585 flywheel HP or 430 HP to the wheels but, who in there right mind will run this setup

If your tuner sudenly make 15 - 20 % more power than what the injector can support, you have to question both tuner and the accuracy of the dyno.
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