06-01-2007, 11:46 AM
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#931
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Naturally Aspirated
Join Date: Feb 2006
Location: Mansfield, OH
My Ride: 1993 Plymouth Duster
Engine: 2.5 Turbo
Induct: Turbo
1/4: 13.400
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 Quote:
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Originally Posted by mwinkle353
Not for nothing. But, would that not cause problems as well? The stock calibration is set to be used on a 1:1 ratio fuel regulator. If the regulator doesn't see vacuum or pressure from any source, then the fuel pressure will not be constant with the manifold pressure. The ratio will go all askew as the manifold pressure changes. Meaning the higher the vacuum (idle and cruising conditions) the richer it will be. Because the pcm thinks that there is less fuel pressure than there actually is. Then, if this is the case, as the O2 sensor is trying to adapt the mixture for the lack of fuel pressure control, the fuel adapt factors will go completely crazy trying to figure out just how much fuel the PCM needs to remove in order to keep it within "clean burning" specs.
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You're right, you could not use that with a stock computer setup. I was merely addressing the above-mentioned issue with needing a non-rising-rate regulator.
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