Humidity and drag racing...whats up?

CoryTACP · 05-07-2007, 10:53 AM

Went to strip Friday night (in Hattiesburg, Mississippi). It was my 2nd trip to the track. I was a running little slower times at first and I think it was because of the humidity. I cut my best 60' time of 2.08 and ran a 14.10?!?!

I dont know what the deal was. It just seemed to be dying on the top end. I ran plenty of 2.1x and was staying in the low 14s. I finally installed my mail order tune and ran my best of 13.99 at 99 with a 2.10 60'. My question is, How exactly does humidty affect drag times?

CoryTACP · 05-08-2007, 06:06 AM

anyone?

ThePunisher · 06-14-2007, 11:49 AM

As the humidity goes up, the air pressure for a given volume of air goes down(the air is less dense). Humid air has fewer oxygen molecules to burn per unit volume. Therefore the engine combusts a little bit less making less power.

05-07-2007, 10:53 AM	#1 (permalink)
CoryTACP Junior Member Join Date: Jan 2007 Posts: 18	Humidity and drag racing...whats up? Went to strip Friday night (in Hattiesburg, Mississippi). It was my 2nd trip to the track. I was a running little slower times at first and I think it was because of the humidity. I cut my best 60' time of 2.08 and ran a 14.10?!?! I dont know what the deal was. It just seemed to be dying on the top end. I ran plenty of 2.1x and was staying in the low 14s. I finally installed my mail order tune and ran my best of 13.99 at 99 with a 2.10 60'. My question is, How exactly does humidty affect drag times? __________________ 2000 GT 5-speed (Performance Red) Mods: JLT Ram air Weld in Flowmasters FRPP 3.73s SCT xcalibrator 2 (mail order tune) FRPP King Cobra clutch and a few visual mods... Best 1/4 run ET: 13.90@100.25 miles per hour 60': 2.07 street tires best 60': 2.07 best r/t: .550

05-08-2007, 06:06 AM	#2 (permalink)
CoryTACP Junior Member Join Date: Jan 2007 Posts: 18	anyone? __________________ 2000 GT 5-speed (Performance Red) Mods: JLT Ram air Weld in Flowmasters FRPP 3.73s SCT xcalibrator 2 (mail order tune) FRPP King Cobra clutch and a few visual mods... Best 1/4 run ET: 13.90@100.25 miles per hour 60': 2.07 street tires best 60': 2.07 best r/t: .550

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06-14-2007, 11:49 AM	#3 (permalink)
ThePunisher Senior Member Join Date: Dec 2004 Posts: 624	As the humidity goes up, the air pressure for a given volume of air goes down(the air is less dense). Humid air has fewer oxygen molecules to burn per unit volume. Therefore the engine combusts a little bit less making less power.