Tune for High Altitude
06-09-2016, 11:50 PM
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Tune for High Altitude
I live in Colorado Springs CO with an elevation of over 6,000 ft. During the summer, DA may reach 8,000 or 9,000 feet. My question is:
Can the ECU compensate for the low air density and maintain the proper A/F ratio, or will it always run rich because it is beyond what the ECU can adjust? The car is stock, but I thought perhaps a dyno tune would ensure I'm not running rich. There's quite a bit of black soot inside the exhaust outlets.
Thanks.
Can the ECU compensate for the low air density and maintain the proper A/F ratio, or will it always run rich because it is beyond what the ECU can adjust? The car is stock, but I thought perhaps a dyno tune would ensure I'm not running rich. There's quite a bit of black soot inside the exhaust outlets.
Thanks.
Last edited by Daniel White; 06-09-2016 at 11:50 PM.
06-10-2016, 10:22 AM
#2
Team Owner
No issue on a stock car.
06-10-2016, 10:23 AM
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St. Jude Donor '15
It takes a barometric pressure reading at startup which should help it compensate for elevation. Whether that actually works perfect or not in the real world, I do not know.
Under part throttle / closed loop I have no doubt that it will adjust just fine. It's WOT / open loop that may be off. Not saying it is.. just that would be my only concern
It should be fine though.
Under part throttle / closed loop I have no doubt that it will adjust just fine. It's WOT / open loop that may be off. Not saying it is.. just that would be my only concern
It should be fine though.
Last edited by schpenxel; 06-10-2016 at 10:23 AM.
06-10-2016, 10:29 AM
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Team Owner
Its fine. GM test up to ~10k feet or something. It is not an issue. If it was, all GM cars/trucks would be blowing up left and right at any high elevation place.
06-10-2016, 12:57 PM
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06-10-2016, 01:29 PM
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St. Jude Donor '15
Not that you'd know or anything 
