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Posted: Thu Dec 16, 2004 8:07 am
by greg donovan
vrg3 wrote:Sometimes a little bit of hair spray on a pipe can help keep a hose on it. The Right Way is to have a bead that the clamp can go past, though...
I think that at 20 psi the stock fuel system would be unable to provide enough fuel to properly cool the intake charge, due to both the high pressure and high temperature. Combine that with no means of measuring intake air temperature and you'll get lots of knock and subsequent timing retard.
I don't know that for sure, but I have a hard time believing otherwise.
thought i would revive an old thread.
would water injection help w/this problem?
Posted: Fri Jan 14, 2005 5:39 pm
by Volksabu
thought i would revive an old thread.
would water injection help w/this problem?
No, basically all water injection does is acts as another form of intercooler, it will cool the charged air, but will not help the lean condition THAT YOU WILL HAVE if you are running 20 psi. Assuming 280 crank hp at 20 psi (10 hp per pound is usually a conservative estimate, especially since the legacy is not intercooled and if your running 20 psi I hope your intercooled) you would need at least 390 cc/min injectors running at 100% duty cycle to prevent a lean condition. It is not recomended to run above 80% duty cycle to prevent damage to the injectors, so you would need at least 486 cc/min injectors to be safe. You will also need a way to control the larger injectors as your stock ecu will not run them correctly. This is also assuming that the factory fuel pump can flow enough fuel at aprox 57 psi (I could not find numbers of what the factory pump flow is in the manual) which I doubt it can.
~Josh