Atmospheric=prformance? How much?

Rev · 07-28-2006, 04:12 PM

I'm just wondering how much atmospheric conditions should affect performance? I live right down near the coast of Texas and that means almost always somewhat humid and near sea level. Seems like ambient temp makes a lot of difference as to how my car performs at the drag strip. I realize that it affects eveyrone equally in a drag race.

It seems that I lose .5 seconds or more when I run at 90 deg F as apposed to 40 deg F. Is that reasonable or do I just need more work on air/fuel mix? Thanks for any insight on this.

Rev

Dark Knight · 07-30-2006, 06:02 AM

I would lose alot of HP here in phoenix between summer and winter, .5 and 3-4mph. If you can find someone at the track with a portable weather station, ask them what the corrected altitude is, then use this to adjust to sea level
http://www.gnttype.org/techarea/misc/altitude.html
Alot of times, hot and humid are the same as running at 5000+ ft altitude..

1989GT · 08-02-2006, 07:44 AM

Here ya go.
http://www.modulardepot.com/density.php

Rev · 08-04-2006, 02:12 PM

Thanks for the link, that's what I was looking for.

Rev

07-28-2006, 04:12 PM	#1
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Atmospheric=prformance? How much? I'm just wondering how much atmospheric conditions should affect performance? I live right down near the coast of Texas and that means almost always somewhat humid and near sea level. Seems like ambient temp makes a lot of difference as to how my car performs at the drag strip. I realize that it affects eveyrone equally in a drag race. It seems that I lose .5 seconds or more when I run at 90 deg F as apposed to 40 deg F. Is that reasonable or do I just need more work on air/fuel mix? Thanks for any insight on this. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

07-30-2006, 06:02 AM	#2
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: Atmospheric=prformance? How much? I would lose alot of HP here in phoenix between summer and winter, .5 and 3-4mph. If you can find someone at the track with a portable weather station, ask them what the corrected altitude is, then use this to adjust to sea level http://www.gnttype.org/techarea/misc/altitude.html Alot of times, hot and humid are the same as running at 5000+ ft altitude.. __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

08-02-2006, 07:44 AM	#3
1989GT Registered Member Join Date: Apr 1999 Location: Cincinnati,OH Posts: 1,511	Re: Atmospheric=prformance? How much? Here ya go. http://www.modulardepot.com/density.php __________________ 89GT,Pro-Bullet 306, H/C/I and a bunch of other stuff. Sold 00GT, Vortech S-Trim, Steeda Boost Pipe, C&L intake, Mac off-road H-pipe, Flowmasters, B&M Ripper shifter, Eibach Sportline springs, Koni Struts/shocks, MM full length subframe connectors, Cobra brakes, 3.73's. My Car Domain Page

08-04-2006, 02:12 PM	#4
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: Atmospheric=prformance? How much? Thanks for the link, that's what I was looking for. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe