How does altidude effect dyno numbers??
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
How does altidude effect dyno numbers??
How many % more HP if you dyno at sea level vs. 1500 feet..
Last edited by GrandSportC3; Jan 10, 2005 at 12:05 PM.
Melting Slicks
Joined: Dec 2001
Posts: 2,321
Likes: 0
From: Reno NV
St. Jude Donor '08
Well...Higher you go, the air is less dense. The less air you have...the less fuel you can jam into a motor. The less air and fuel....well...you get the idea. 
Just supercharge it and you won't have to worry as much. lol
David
Just supercharge it and you won't have to worry as much. lolDavid
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,357
From: Santa Ana CA
Originally Posted by GrandSportC3
How many % more HP if you dyno at sea level vs. 1500 feet..
That being said, it should really do little to affect your dyno numbers assuming that the dyno numbers are corrected for STP (Standard Temperature & Pressure).
Le Mans Master
Joined: Jun 2003
Posts: 5,446
Likes: 2
From: Not Correctly Restored Stingray Fla.
You wanna try and find more HP by "playing with the numbers" ???
Hey "O" just go on that diet you've been talking about and you'll pick up a good tenth right there.
Hey "O" just go on that diet you've been talking about and you'll pick up a good tenth right there.
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
c'mon on spill the beans!!!!! 
I know you're asking because your new motor was dynoed at 1500 ft and your calculating adjusted here in FL.
What is it Olivier? How much does it put out?!!
I know you're asking because your new motor was dynoed at 1500 ft and your calculating adjusted here in FL.
What is it Olivier? How much does it put out?!!
Instructor
Joined: May 2004
Posts: 199
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From: Santa Monica CA
Originally Posted by GrandSportC3
How many % more HP if you dyno at sea level vs. 1500 feet..
Dave
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Instructor
Joined: May 2004
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From: Aurora CO
On a properly set up engine you will lose 3% per 1000 feet of elevation. So up here in Denver the power will be down about 15% if jetted and tuned for altitude vs the same engine tuned for sea level. If you bring the car up from sea level with no changes the drop will be greater.
