Tune carb for higher altitude?
10-23-2011, 10:16 PM
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Car: 83 Z-28
Engine: LG4
Transmission: 700R4
Axle/Gears: 02 WS6 Rear w/3:42
Tune carb for higher altitude?
Hey all, a couple months ago I moved from Florida to Colorado. Does the carb need to be tuned to account for the higher altitude? What would I need to tweak?
10-24-2011, 02:07 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The computer carb does the primary retuning for you on the go.
If you haven't retuned the secondaries (rods/hanger, AV tension), then you'll probably benefit from that.
If you haven't retuned the secondaries (rods/hanger, AV tension), then you'll probably benefit from that.
10-31-2011, 07:21 PM
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Car: 89 Firebird
Engine: L98
Transmission: T-56
Axle/Gears: 3.73
Re: Tune carb for higher altitude?
What do you have for a carb?
When I moved from the eastern virginia to newmexico I went from "just running a little too rich" to drounding the engine in fuel.
When I moved from the eastern virginia to newmexico I went from "just running a little too rich" to drounding the engine in fuel.
11-01-2011, 04:09 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
When you go to a higher altitude, you can usually get away with advancing it a few degrees from the factory low altitude setting since cylinder pressures will be a little lower. Backing it off a few degrees would be going the wrong way.
11-01-2011, 06:15 PM
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Car: 83 Z-28
Engine: LG4
Transmission: 700R4
Axle/Gears: 02 WS6 Rear w/3:42
Re: Tune carb for higher altitude?
I have a quadrajet. I haven't re-tuned the secondaries. Any suggestions on what rods/hanger I should go with?
11-04-2011, 10:39 AM
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Car: 1984 Z28
Engine: 454
Transmission: Th400
Axle/Gears: 3.73
Re: Tune carb for higher altitude?
That was not the case for the car I use to drive when I lived in California. Maybe it was because I didn't rejet the carbs and the mixture was off at altitude. The car wouldn't run pull out on top end as good unless I backed it off.
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