E/T correction for temp

QuantumMotorsports · 06-09-2001, 12:26 AM

Does anyone know how to correct E/Ts for altitude and temp? I ran once when it was like 60 degrees and went 14.6 @ 94 and after a few mods, tonight it was about 90 and I went 14.7 @ 95. I was pissed. Does the temp make that much diff? Thanks guys. By the way, the altitude at the track I was at was 1200 ft above sea level.

------------------
Michael Black
Quantum Motorsports
Norman, Oklahoma

1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" offroad H pipe w/ 2 chamber flowmasters, T5 tranny
New E/T!!!
14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

bigwhitecobra · 06-09-2001, 12:44 AM

At that altitude, I would say no, it doesn't matter that much at all. Sorry, you just had a bad night bro. Temperature does matter, however. That 30 degree difference will hurt by about a tenth or 2. Maybe, I dunno. Ask Unit5302. He's a wiz at this stuff.
Not a yellow wiz, but a wiz none-the-less.

------------------
The Black Mamba 11.2@124
1994 Cobra

Dark Knight · 06-09-2001, 10:03 AM

http://www.prestage.com/carmath/calc...o_standard.asp

------------------
84 convt,'95 302,AFR's, performer
3.55's, underdrives stock shorties
stock cam, 1.7's
14.06@100.21, 255RWHP on a hot day
265 on the mph/weight chart

QuantumMotorsports · 06-09-2001, 11:25 AM

Thanks guys, I used the computer on that site you posted and with the same barometric pressure and a 25 degree difference it says I should have run about the same time. But, I'm almost positive the pressure was different because it was about to storm last night. So with a little less barometric pressure (one inch of mercury) it says I should be at a 14.3 @ 97, so I need to find out what the barometric pressure was last night I guess. Thanks for the link man.

------------------
Michael Black
Quantum Motorsports
Norman, Oklahoma

1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" offroad H pipe w/ 2 chamber flowmasters, T5 tranny
New E/T!!!
14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

dinomite · 06-09-2001, 01:43 PM

I ran today after doing after putting on pulleys and ran a 15.5 best, previously when stock i ran a 15.2. This is at the same strip, about 800ft elev., and it was witht he same group of mustangers both times (20+) people. Today the temp was about 90, last time it was 55ish. Everyone was running really slow and everyone was having trouble hooking. Don't know why the latter, but i'd say that the temp and humidity had an effect.

06-09-2001, 12:26 AM	#1
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	E/T correction for temp Does anyone know how to correct E/Ts for altitude and temp? I ran once when it was like 60 degrees and went 14.6 @ 94 and after a few mods, tonight it was about 90 and I went 14.7 @ 95. I was pissed. Does the temp make that much diff? Thanks guys. By the way, the altitude at the track I was at was 1200 ft above sea level. ------------------ Michael Black Quantum Motorsports Norman, Oklahoma 1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" offroad H pipe w/ 2 chamber flowmasters, T5 tranny New E/T!!! 14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

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06-09-2001, 12:44 AM	#2
bigwhitecobra Huh? Whatcha said? Join Date: Oct 2000 Location: Fayetteville, NC Posts: 1,073	At that altitude, I would say no, it doesn't matter that much at all. Sorry, you just had a bad night bro. Temperature does matter, however. That 30 degree difference will hurt by about a tenth or 2. Maybe, I dunno. Ask Unit5302. He's a wiz at this stuff. Not a yellow wiz, but a wiz none-the-less. ------------------ The Black Mamba 11.2@124 1994 Cobra

06-09-2001, 10:03 AM	#3
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	http://www.prestage.com/carmath/calc...o_standard.asp ------------------ 84 convt,'95 302,AFR's, performer 3.55's, underdrives stock shorties stock cam, 1.7's 14.06@100.21, 255RWHP on a hot day 265 on the mph/weight chart

06-09-2001, 11:25 AM	#4
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	Thanks guys, I used the computer on that site you posted and with the same barometric pressure and a 25 degree difference it says I should have run about the same time. But, I'm almost positive the pressure was different because it was about to storm last night. So with a little less barometric pressure (one inch of mercury) it says I should be at a 14.3 @ 97, so I need to find out what the barometric pressure was last night I guess. Thanks for the link man. ------------------ Michael Black Quantum Motorsports Norman, Oklahoma 1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" offroad H pipe w/ 2 chamber flowmasters, T5 tranny New E/T!!! 14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

06-09-2001, 01:43 PM	#5
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	I ran today after doing after putting on pulleys and ran a 15.5 best, previously when stock i ran a 15.2. This is at the same strip, about 800ft elev., and it was witht he same group of mustangers both times (20+) people. Today the temp was about 90, last time it was 55ish. Everyone was running really slow and everyone was having trouble hooking. Don't know why the latter, but i'd say that the temp and humidity had an effect.