How Much Does Density Altitude Affect ET

pmrphil · 12-13-2019, 07:42 PM

Quote:

Originally Posted by 340Cuda

Try this one...

http://www.dragracingpro.com/Books.html

thanks

vic guilmino · 12-13-2019, 07:55 PM

What do you use.
DA OR CF
AND WHY

HR9121 · 12-13-2019, 09:12 PM

Typically 200 in DA equals 1 hundredth to my car but humidity and water grains can play a huge factor. An example would be if say the humidity went up say 15% then it may only take 150 in DA to equal the same .01
Data and lots of it can never be underestimated, I have 5 or 6 log books full of it on this combination so if you come by my trailer and see log books scattered everywhere you know I'm lost on what to dial lol!

Ed Wright · 12-13-2019, 09:25 PM

I found simply typing the data from my hand held “weather station” into Crew Chief Pro software predicts my old car pretty much dead nuts, after three passes data at a given track. Mine does not give oxygen data. Appears to me it is not that important. I’m very old, of course, so probably just do not know.

12-13-2019, 07:55 PM	#2
vic guilmino Senior Member Join Date: Dec 2001 Location: wv Posts: 884 Likes: 42 Liked 56 Times in 21 Posts	Re: How Much Does Density Altitude Affect ET What do you use. DA OR CF AND WHY __________________ Vic Guilmino 1129 STK Last edited by vic guilmino; 12-14-2019 at 01:36 PM.

12-13-2019, 09:12 PM	#3
HR9121 Live Reporter Join Date: Jan 2011 Location: New Bern, NC Posts: 3,467 Likes: 146 Liked 3,363 Times in 731 Posts	Re: How Much Does Density Altitude Affect ET Typically 200 in DA equals 1 hundredth to my car but humidity and water grains can play a huge factor. An example would be if say the humidity went up say 15% then it may only take 150 in DA to equal the same .01 Data and lots of it can never be underestimated, I have 5 or 6 log books full of it on this combination so if you come by my trailer and see log books scattered everywhere you know I'm lost on what to dial lol! __________________ James Williamson W200 J/SA. SS/JA

12-13-2019, 09:25 PM	#4
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: How Much Does Density Altitude Affect ET I found simply typing the data from my hand held “weather station” into Crew Chief Pro software predicts my old car pretty much dead nuts, after three passes data at a given track. Mine does not give oxygen data. Appears to me it is not that important. I’m very old, of course, so probably just do not know. __________________ Ed Wright 4156 SS/JA