Elevation affecting performance? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

walt353 · 07-16-2011, 01:02 PM

How much should elevation effect performance? I was on a deserted piece of highway in Utah and decided to get on it some. At 135 it didnt seem to have much left. This was at about 6000 ft elevation. This sound right? The car runs great around town and at normal highway speeds. Plenty of power.

jtzako · 07-16-2011, 01:10 PM

I wouldnt be all that surprised at 6000ft really. In the salt flats (much lower altitude) the car couldnt get much over 170mph stock. (with the limiter tuned out of course). You loose about 72hp at 6000 feet vs sea level.

walt353 · 07-16-2011, 01:19 PM

Great. Thanks for getting back.

jtzako · 07-16-2011, 01:19 PM

HP loss formula:

(elevation x 0.03 x hp @ sea level) / 1000

So 6000 ft x .03 = 180
180 x 400 = 72000
72000 / 1000 = 72

Other factors like Barometric pressure, temperature etc also factor in. You will have even less HP at 6000 ft when it is hot out vs when cool.

walt353 · 07-16-2011, 01:37 PM

Thanks for the math. After looking at the #s 135 looks OK. Next time im on a road trip at a lower elevation ill give her another shot.

mike25 · 07-16-2011, 03:12 PM

glad im only loosing about 19hp where im at.

upflying · 07-16-2011, 05:42 PM

Turbo/supercharging does compensate for HP loss at altitude.

walt353 · 07-16-2011, 07:45 PM

I also live at a much lower altitude, Indy,. Utah was where I was at at the time. I could probably go out and try the same test here but I dont want to go to jail. LOL Indy is way more populated than where I was at in Utah. Indianapolis 1,000,000 - Utah ,where I was at, 0. Thanks for the replys. I wanted to make sure my car wasnt broke.

07-16-2011, 01:02 PM	#1
walt353 Drives: !SS/RS Victory Red Join Date: Feb 2011 Location: Indianapolis Posts: 158 View My Garage	Elevation affecting performance? How much should elevation effect performance? I was on a deserted piece of highway in Utah and decided to get on it some. At 135 it didnt seem to have much left. This was at about 6000 ft elevation. This sound right? The car runs great around town and at normal highway speeds. Plenty of power. __________________ 1SS/RS ,LS3, Volant Intake, VMax TB, Hurst Shifter

07-16-2011, 01:10 PM	#2
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	I wouldnt be all that surprised at 6000ft really. In the salt flats (much lower altitude) the car couldnt get much over 170mph stock. (with the limiter tuned out of course). You loose about 72hp at 6000 feet vs sea level. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

07-16-2011, 01:19 PM	#3
walt353 Drives: !SS/RS Victory Red Join Date: Feb 2011 Location: Indianapolis Posts: 158 View My Garage	Great. Thanks for getting back. __________________ 1SS/RS ,LS3, Volant Intake, VMax TB, Hurst Shifter

07-16-2011, 01:19 PM	#4
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	HP loss formula: (elevation x 0.03 x hp @ sea level) / 1000 So 6000 ft x .03 = 180 180 x 400 = 72000 72000 / 1000 = 72 Other factors like Barometric pressure, temperature etc also factor in. You will have even less HP at 6000 ft when it is hot out vs when cool. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

07-16-2011, 01:37 PM	#5
walt353 Drives: !SS/RS Victory Red Join Date: Feb 2011 Location: Indianapolis Posts: 158 View My Garage	Thanks for the math. After looking at the #s 135 looks OK. Next time im on a road trip at a lower elevation ill give her another shot. __________________ 1SS/RS ,LS3, Volant Intake, VMax TB, Hurst Shifter

07-16-2011, 03:12 PM	#6
mike25 Drives: 2012 Camaro 2SS/RS Join Date: Jul 2009 Location: Dubba V Posts: 2,869	glad im only loosing about 19hp where im at. __________________ 2LT/RS M6 CGM VIN#53104 SOLD 2012 Black 2SS/RS w/ Hurst- Mods: Corsa catback, SSE, Vararam

07-16-2011, 05:42 PM	#7
upflying Drives: '86 Monte Carlo SS Join Date: Nov 2010 Location: Reno, NV Posts: 3,119	Turbo/supercharging does compensate for HP loss at altitude.

07-16-2011, 07:45 PM	#8
walt353 Drives: !SS/RS Victory Red Join Date: Feb 2011 Location: Indianapolis Posts: 158 View My Garage	I also live at a much lower altitude, Indy,. Utah was where I was at at the time. I could probably go out and try the same test here but I dont want to go to jail. LOL Indy is way more populated than where I was at in Utah. Indianapolis 1,000,000 - Utah ,where I was at, 0. Thanks for the replys. I wanted to make sure my car wasnt broke. __________________ 1SS/RS ,LS3, Volant Intake, VMax TB, Hurst Shifter

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