Density Altitude simple question, been a while!
Thread Starter
On The Tree
Joined: Apr 2003
Posts: 122
Likes: 0
From: Cincinnati,Ohio
Density Altitude simple question, been a while! Can't remember if the higher the density is, the better or the lower number is better once the calculations have been performed.
Every 1000 ft of DA is about 1 to 1-1/2 tenths, depending on car, combo, tune and how fast she runs.
I've just recently started using the DA to calculate the horsepower I should have available and gone from there. 
DA = your "corrected elevation" for a given day and time. If you are at say 500 ft, but DA is say 1500, then the air is similar or identical density to racing at 1500 ft, which is no good lol
The higher the DA, the better the corrected number will be. Using Derek's notes for an example (1000 DA = .1 Seconds for simplicity):
13.50 @ 6000 DA = 12.90 @ 0 DA
13.50 @ 3000 DA = 13.20 @ 0 DA
13.50 @ 1000 DA = 13.40 @ 0 DA
13.50 @ 6000 DA = 12.90 @ 0 DA
13.50 @ 3000 DA = 13.20 @ 0 DA
13.50 @ 1000 DA = 13.40 @ 0 DA
TECH Resident
Joined: May 2005
Posts: 983
Likes: 0
From: 8000DA Land
I can only say from experience that 8000ft DAs suck big time 
And people can hear me complain about it from long distances...
Not really other track to go, so it's just a cry for an excuse of still running high 12s
And people can hear me complain about it from long distances...
Not really other track to go, so it's just a cry for an excuse of still running high 12s
