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Elevation- loss of power/need retuned? Help

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Old 04-23-2012, 09:47 PM   #1
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Default Elevation- loss of power/need retuned? Help

So I'll try to make this as short as possible. I moved to CO from Ohio. Right before I moved I hard my car Dyno tuned, it did 350/370 at the wheels. Since getting to CO it seems "slow". Don't have any 1/4 times but it doesn't even want to break the tires loose at 10-15mph when u punch it in first. Is this just from the altitude/elevation and nothing I can do will help, or would having it retuned here help and make a difference?

If retuning at the new elevation WONT help, is there anything else i can do without going into the motor, would going to 4.10 is make big difference over 3.42's to help make up for the feeling of lost power? Dont know what else I can do since on spray i make 430/506 and Im not sure how much further I want to push the stock rods/internals

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Old 04-23-2012, 10:45 PM   #2
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Originally Posted by simplysix View Post
So I'll try to make this as short as possible. I moved to CO from Ohio. Right before I moved I hard my car Dyno tuned, it did 350/370 at the wheels. Since getting to CO it seems "slow". Don't have any 1/4 times but it doesn't even want to break the tires loose at 10-15mph when u punch it in first. Is this just from the altitude/elevation and nothing I can do will help, or would having it retuned here help and make a difference?

If retuning at the new elevation WONT help, is there anything else i can do without going into the motor, would going to 4.10 is make big difference over 3.42's to help make up for the feeling of lost power? Dont know what else I can do since on spray i make 430/506 and Im not sure how much further I want to push the stock rods/internals
Loss of power is pretty normal for higher elevations. Forced Induction is less susceptible to it iirc. Just googling found a formula

hp loss = elevation x 0.03 x hp @ sea level

not sure if thats any good.
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Old 04-24-2012, 12:01 PM   #3
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Tuning won't help with the lack of oxygen up there compared to near sea level.

4.10s should help get you back to where you were in Ohio.
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Old 04-24-2012, 09:55 PM   #4
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Pretty depressing isnt it!
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Old 04-24-2012, 10:06 PM   #5
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Thanks for the help guys.

Ive been thinking about doing a motor build this winter to get to around 450rwhp and building it so I can shoot a 150 or so shot of nitrous and not have to worry about it. But I think I might do a turbo set up instead to help the altitude difference
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Old 04-24-2012, 10:25 PM   #6
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It blows man, here these guys with bone stock ls1's go sometime high 12's low 13's and here I am with my full exhaust, ls6 manifold, SLP cold air package, dyno tune, etc…. and the best I've ever gotten my car is a 13.7 because of the elevation. It's so aggravating!
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Old 04-24-2012, 11:06 PM   #7
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It blows man, here these guys with bone stock ls1's go sometime high 12's low 13's and here I am with my full exhaust, ls6 manifold, SLP cold air package, dyno tune, etc…. and the best I've ever gotten my car is a 13.7 because of the elevation. It's so aggravating!
Yes, super annoying, and getting even worse the more I figure out theres nothing I can do about it aside from going turbo and making more hp
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Old 04-24-2012, 11:29 PM   #8
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A retune will certainly help, but it will not give you back ALL the HP you lost.

I can help you with a retune if that's what you want to do. PM Me
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Old 04-25-2012, 04:33 PM   #9
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A retune will certainly help, but it will not give you back ALL the HP you lost.

I can help you with a retune if that's what you want to do. PM Me
Pm sent
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Old 04-25-2012, 04:54 PM   #10
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glad im not there. good luck.
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Old 04-26-2012, 12:45 AM   #11
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glad im not there. good luck.
Yea, really. I moved cause I got a good job offer so I can't complain to much. But the power loss does suck.
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05, altitude, calculation, dyno, elevation, engine, gto, high, horsepower, loss, ls1tech, power, retune, slower, tune, tuning, zo6

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