Toronto Red Aero Re: running rich (thread that fell off) - Saab 9000 Bulletin Board - Saabnet.com
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Toronto Red Aero Re: running rich (thread that fell off)
Posted by steve in BC (more from steve in BC) on Fri, 17 Nov 2000 18:54:57
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you said:
>>>>>>>Your plugs may be fouling because the car is running too rich. Thats why in very high temp in California, they didn't foul because the hot intake air is less dense and that car was running leaner, i.e. cleaner. With your larger injectors and FPR, you may need to do some tuning using an A/F gauge or meter to measure O2 voltage and/or EGT gauge. I would not run less than .87 volts at WOT and full boost. That reading is best for balance of safety and power. Your best to get some dyno time.
>>>
I'm running .85+ on average at WOT around 20psi (I use a Autometer A/Fgauge). I've been tuning the AMM and presently have it set @ 320ohm. Runs well now and plugs are looking pretty good. My biggest problem is tuning the MSD BTM in the mid boost range (12-15psi) to allow sufficient retard at max boost. More specifically, the ideal retard at 20psi is borderline around 15psi and great at low psi. Basically the map leans up a bit then gets rich at WOT. In the past I've been compensating with a little added fuel, and presently have it down pretty well just making fine adjustments to the AMM.
steve, '88 9KT
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