[Z06] need correction factor for elevation !!!!!
Thread Starter
Intermediate
Joined: Dec 2006
Posts: 45
Likes: 0
we have guys that go from here to vegas and gain 8-9 tenths off there time in the quarter mile. there was also two c6 zo6 runing 13.00 too13.50, at 110-114mph ,which is a car that runs low 11s and 120+
Racer
Joined: Mar 2005
Posts: 399
Likes: 2
From: Newtown PA
http://www.modulardepot.com/density.php
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Drifting
Joined: May 2005
Posts: 1,513
Likes: 4
From: Pl Grove Utah
Yeah but it sucks being in the 12s/11s at 4500 ft and knowing the car will run low 11s/high 10s at sea level.Oh well,guess when we hit tens,THAT is moving 
Stock 07 Z06s here are running 13.5-13.7 at 108 ???? driver or altitude ? Have a great night !!!!
Stock 07 Z06s here are running 13.5-13.7 at 108 ???? driver or altitude ? Have a great night !!!!
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
Then you obviously either live in Nothern California where there are GREAT tracks or you've never been to a track.
I see judging from your zip code you do live in Northern California. Do you know how many national NHRA records have been broken up there because of the better track conditions? Why not take a trip down here, then we won't have any excuses down here?
I see judging from your zip code you do live in Northern California. Do you know how many national NHRA records have been broken up there because of the better track conditions? Why not take a trip down here, then we won't have any excuses down here?
Last edited by Z06Electron; Nov 5, 2007 at 10:03 AM.
Melting Slicks
Joined: Aug 2002
Posts: 2,737
Likes: 2
From: California USA
Then you obviously either live in Nothern California where there are GREAT tracks or you've never been to a track.
I see judging from your zip code you do live in Northern California. Do you know how many national NHRA records have been broken up there because of the better track conditions? Why not take a trip down here, then we won't have any excuses down here?
I see judging from your zip code you do live in Northern California. Do you know how many national NHRA records have been broken up there because of the better track conditions? Why not take a trip down here, then we won't have any excuses down here?
Advanced
Joined: Jan 2006
Posts: 92
Likes: 0
From: Castle Rock CO
Where are you located at that elevation? I know all about racing at elevation, and anyone who dosen't believe in correction factor should race at altitude once and see if that changes their mind!
Melting Slicks
Joined: Aug 2002
Posts: 2,737
Likes: 2
From: California USA
If I did, I might be low 11's stock C5Z. Is that acceptable?
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Here are the official NHRA correction factors.
They correct for track altitude only not the weather.
NHRA Altitude Correction Factors
So seek out the listed track whose elevation is nearest to your venue and do the calculation.
Ranger
They correct for track altitude only not the weather.
NHRA Altitude Correction Factors
So seek out the listed track whose elevation is nearest to your venue and do the calculation.
Ranger
Advanced
Joined: Jan 2006
Posts: 92
Likes: 0
From: Castle Rock CO
I dont think anyone posts corrected times as if they ran them, they just want to know what the correction is to compare how they are doing compared to sea level comparisons... Unfortunately too, the corrections that the NHRA uses are not accurate either. They are acurrate for elevation but not DA. The corrections for Bandimere in Denver would be correct if the DA matches the elevation, but that is never the case. The track here is 5860 ft and the best DA I have ever seen, in 10 years, is 6700 ft. It's also no secret as to why record breaking passes are made and why cars seem to run faster in certain locations than others.. Alot of tracks have up to -1500 ft DA in the fall and spring.
Melting Slicks
Joined: Aug 2002
Posts: 2,737
Likes: 2
From: California USA
10hp ~= 1mph ~= 0.1 ET ~= 100lb. Going from 12.08 to 13.08 would therefore be an estimated loss of 100hp. We have all neglected to talk about something else very important, race wt w/driver. Given similar driver skill, a 150lb driver has an advantage of about 0.1 ET on a 250lb driver.
Apparently my new drag radials (m/t st radials) are ~10lbs lighter than an F1!! They also help gearing as they are shorter. Can't wait to try them. Its time we all met up on the W Coast somewhere for a winter run. Obviously not at the 7000ft track though.