drag racing question

Bill · January 13th, 2006, 05:17 PM

ok well im watching speed channel right now and top fuel dragsters are on and im noticing that when they do a burn out or go down the track it looks like the tires get taller and narrower but before they do this there shorter and wider. i have an idea to why this does this but im not sure. is it becuase when there still its just sitting there the weight makes in like that. any other info on this.

AtlanticBlue99 · January 13th, 2006, 05:23 PM

from my understanding: when the heat of the air inside the tires is increased, the tires expand upward. this is because of the basic physical/chemisty equation of >T = >A, sort of what gives hot air balloons flight (heat rises and expands)

1slo5.0 · January 13th, 2006, 05:41 PM

Slicks have a very thin sidewall. They "grow" with speed. The thin sidewall in combination with the energy of motion causes them to grow like that. The taller the slick, the more it grows.

mdvaldosta · January 13th, 2006, 05:50 PM

More like what darrel says, it's simply the tires being forced out from speed and gravity. They have weak sidewalls (for grip), a byproduct of a weak sidewall is they stretch at high speeds.

This is a good thing though, because it allows for lower engine speeds at higher vehicle speeds. It gives alittle gearing benefit.

Twist 2 Go · January 13th, 2006, 07:58 PM

right.if you look at a slow motion video of a burnout, the tires are actually FLAT on the rear of the tire.

Bill · January 13th, 2006, 11:30 PM

oh ok. gotcha. i just really never noticed before cause i mostly watch the races where you cant see most of the tire. like funny car, pro street and so forth. pretty cool. funny part is i actually first noticed it on birdiemans top fuel car today. cause i was really paying attention to see him race. he lost tho.

99mustang232 · January 14th, 2006, 12:29 AM

this is why they have to figure in more fender gap when building the car, to account for tire expansion

IcantDo55 · January 15th, 2006, 12:13 AM

They expand and act like an overdrive gear from (sp?) centrificial force.

Birdieman · January 15th, 2006, 01:51 PM

As others have said, it's basicly a centifugal force deal. They tend to get taller on the burnout as well, and you can actually feel it 'stand up' once you get on the loud pedal to start the burnout.

January 13th, 2006, 05:17 PM	#1
Bill Hardcore Enthusiast Join Date: Aug 2005 Posts: 1,327 iTrader: 0 reviews	drag racing question ok well im watching speed channel right now and top fuel dragsters are on and im noticing that when they do a burn out or go down the track it looks like the tires get taller and narrower but before they do this there shorter and wider. i have an idea to why this does this but im not sure. is it becuase when there still its just sitting there the weight makes in like that. any other info on this. __________________ Too often, We lose sight of life's simple pleasures. Remember, when someone annoys you it takes 42 muscles in your face to frown, BUT, it only take 4 muscles to extend your arm and bitch-slap that Mother@#?!&! upside the head!!

January 13th, 2006, 05:23 PM	#2
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	from my understanding: when the heat of the air inside the tires is increased, the tires expand upward. this is because of the basic physical/chemisty equation of >T = >A, sort of what gives hot air balloons flight (heat rises and expands) __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

January 13th, 2006, 05:41 PM	#3
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Slicks have a very thin sidewall. They "grow" with speed. The thin sidewall in combination with the energy of motion causes them to grow like that. The taller the slick, the more it grows. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

January 13th, 2006, 07:58 PM	#5
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	right.if you look at a slow motion video of a burnout, the tires are actually FLAT on the rear of the tire. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

January 13th, 2006, 11:30 PM	#6
Bill Hardcore Enthusiast Join Date: Aug 2005 Posts: 1,327 iTrader: 0 reviews	oh ok. gotcha. i just really never noticed before cause i mostly watch the races where you cant see most of the tire. like funny car, pro street and so forth. pretty cool. funny part is i actually first noticed it on birdiemans top fuel car today. cause i was really paying attention to see him race. he lost tho. __________________ Too often, We lose sight of life's simple pleasures. Remember, when someone annoys you it takes 42 muscles in your face to frown, BUT, it only take 4 muscles to extend your arm and bitch-slap that Mother@#?!&! upside the head!!

January 13th, 2006, 05:50 PM	#4
mdvaldosta MM Fanatic 2002 Mustang GT 11.47@120.58 Join Date: Aug 2005 Location: Valdosta, GA Posts: 3,940 iTrader: 0 reviews	More like what darrel says, it's simply the tires being forced out from speed and gravity. They have weak sidewalls (for grip), a byproduct of a weak sidewall is they stretch at high speeds. This is a good thing though, because it allows for lower engine speeds at higher vehicle speeds. It gives alittle gearing benefit.

January 14th, 2006, 12:29 AM	#7
99mustang232 MM Fanatic 1999 Ford Mustang V6 Join Date: Sep 2005 Location: newport news, va Posts: 3,745 iTrader: 0 reviews	this is why they have to figure in more fender gap when building the car, to account for tire expansion __________________ ...even fire and single cammin 1986 Ford F-150 5.0L 2WD 1994 Toyota Pickup 2.4L 4WD 1999 Ford Mustang 3.8L V6 2002 Jeep Grand Cherokee 4.0L 2WD 2008 GMC Sierra Denali 6.2L AWD

January 15th, 2006, 12:13 AM	#8
IcantDo55 Enthusiast Join Date: Aug 2005 Location: Va Beach VA Posts: 590 iTrader: 0 reviews	They expand and act like an overdrive gear from (sp?) centrificial force. __________________ -Mike Link to My Site Want to Play Some Pool??? Stroked and Blown!

January 15th, 2006, 01:51 PM	#9
Birdieman Newbie Join Date: Oct 2005 Posts: 7 iTrader: 0 reviews	As others have said, it's basicly a centifugal force deal. They tend to get taller on the burnout as well, and you can actually feel it 'stand up' once you get on the loud pedal to start the burnout.

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