High Altitude Tuning
03-07-2002, 11:54 AM
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High Altitude Tuning I am using the new LS1-Edit at an altitude of 5200 ft. I am wondering if I need to make fuel adjustments or timing changes at this higher altitude. On non-computer cars, we can run leaner and dial in a lot more timing without problems. Since the fuel is measured as a RATIO, does it matter? Anyone else at a higher place?
03-07-2002, 01:37 PM
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Re: High Altitude Tuning I've found the exact same on my '94 Z28 when tuning it with LT1_Edit. It *really* likes to be run lean, and with lots of timing (up to ~39 degrees or so). Unfortunately, I haven't had time to work with my LS1 to the same level yet, but I intend to this weekend at the dragstrip. <img src="gr_stretch.gif" border="0">
-Andrew
-Andrew
03-07-2002, 05:45 PM
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Re: High Altitude Tuning I can definetly say that the cars run a little leaner without problems here in New Mexico. I cant say that the timing is high. I would say run the car and see what the ltrim etc look like then go from there.
Gary
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03-08-2002, 07:05 AM
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Re: High Altitude Tuning Just a comment on terminology. You don't run leaner at High altitude.
THe air is thinner, so there is less oxygen in the air. This means that you need less fuel to get the same AFR as you would have at sea level.
Just knit picking, but want to make sure people don't try and reduce the AFR at altitude.
KenK
THe air is thinner, so there is less oxygen in the air. This means that you need less fuel to get the same AFR as you would have at sea level.
Just knit picking, but want to make sure people don't try and reduce the AFR at altitude.
KenK
03-08-2002, 10:41 AM
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Re: High Altitude Tuning Thanks KenK,
That makes sense; less or thinner air requires less fuel to maintain the same RATIO. I thought that was the case; just needed to hear it from someone else.
I thinks the timing is a different story. When tuned to the max here, I have driven my older cars to a lower altitude to have them ping badly with the same octane gas. So I guess I can get by here with more advance.
That makes sense; less or thinner air requires less fuel to maintain the same RATIO. I thought that was the case; just needed to hear it from someone else.
I thinks the timing is a different story. When tuned to the max here, I have driven my older cars to a lower altitude to have them ping badly with the same octane gas. So I guess I can get by here with more advance.
03-09-2002, 12:17 AM
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Re: High Altitude Tuning Sorry about that, KenK translated my statement correctly, I guess thats what I get for eating lunch, shuffling paperwork and responding to your question at the same time.
Gary
Gary
