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1. I live in Australia, so our specs are different to North American specs.
2. The car is a 1995 9000 CSE manual fitted with the Aero engine management computer, wheels, muffler and other unknown pieces, apparently ex-factory.
3. My local dealer suggests replacing the air inlet temperature sensor with a fixed resistor, and replacing two fixed setting pressure bypass valves with adjustable ones to improve output. He then suggests increasing the pressure bypass level for optimum performnce in the city, then taking it out on the highway and backing it off to compensate for the cooler air.
4. A New Zealand company suggests that the SAAB APC logic of backing off pressure in big chuncks instead of incrementally effects performance significantly. Their unit runs a higher boost and backs it off in small steps when pinging is detected.
5. I think my dealer is missing something. Why throw out a perfectly good piece of information like ambient air temperature? Why not instead put a fixed resistor in series with the air temperature sensor, to offset the value downwards, but not eliminate the benefit of knowuing when temperature changes. Any comments?
6. Can someone clarify for me exactly what engine parameters the APC control module controls? i.e. boost pressure, mixture ratio, spark timing, what else? What exactly do the replacement chip guys do?
I want to do this once, get it right, and leave it alone. I am not in it for the tinker value, I just want a bit more go while not blowing by engine to bits. 40hp (30kW) extra would do just fine. (oh, and a few more revs. 6000rpm is a through point, not a destination!
Thanks,
Simon Kelly
Sydney, Australia
Any help would be appreciated.
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