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Author Topic:   cold tire...hott tire?
nailngoracing
Dirt Maniac

Total posts: 170
posted May 02, 2005 07:36 PM  
left tire is cold while the right is smok'in hott! Rear of course!

What Does that mean?

irace74
Dirt Forum Racer

Total posts: 80
posted May 02, 2005 08:16 PM  
It should mean tight.very tight.push monster....Like the right rear is doing all of the work. Sounds to me like you need some left rear and left side in this car. Wedge should help. Also, some cars have offset rears (left inside normal track) this will tend to tighten the car under all conditions but, it will also cause the right rear to run hotter. If you are running short bars on the rear suspension, loose roll stear may be the only thing keeping you from having a push monster.....

nailngoracing
Dirt Maniac

Total posts: 170
posted May 02, 2005 08:40 PM  
my cross is about 45% and my rear is about 51%!

it feels loose getting in and coming out!?

nvracer
Dirt Maniac

Total posts: 127
posted May 02, 2005 08:48 PM  
A much hotter RR tire verse LR tire is an indication of a loose condition.
it sound like you could add left rear bite.
Add lead to increase Rear %.
Increase LR bar angle.
Just a few ideas

Rat Trap
Dirt Maniac

Total posts: 129
posted May 02, 2005 09:38 PM  
i would say your cross needs to come up to 51-52% and your rear around 56% for a starting point. With your cross only at 45% that RR is staying pinned under the car.

irace74
Dirt Forum Racer

Total posts: 80
posted May 03, 2005 07:40 AM  
Look for left side at around 55% with you in the car, and 57 rear.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted May 03, 2005 07:48 AM  
how does the car handle? if it is loose all the time? or super tight? both could be caused by rr spinning way too much, or too much rr drive, kinda a hard to tell you what is wrong deal without knowing how the car drives.
also how are your front tires? you will notice alot of cars with severe push will super heat a rf tire also.

[This message has been edited by zeroracing (edited May 03, 2005).]

de94wcc
Dirt Forum Racer

Total posts: 87
posted May 03, 2005 08:53 PM  
The rear tires are locked together, so if you think about it, the only difference is which tire is being loaded more heavily during race conditions. You should always attempt to increase the load on the cold tire. As a last resort, you can also decrease the load on the hot tire. There are of course many ways to accomplish this, but it definitely sounds as though you need to correct your cross/rear percentages. Your numbers sound like those used for an asphalt car. 51-52% left and 57-60% rear on dirt should get you in the ballpark.

driver27
Dirt Maniac

Total posts: 194
posted May 04, 2005 06:28 AM  
Now some may disagree, but If your car has no side bite on corner enrty to the point you are sliding (backing)the car into the turns, you will over heat the rr tire. I believe this holds particularly true on a hard track. In this case more load on the rr tire is the solution. It is what ive been battling the past couple years. Applying more load to the lr tire will only make the car even worse. So it is important to know exactly what the car is doing at all points around the track.

ep221
Dirt Roller

Total posts: 8
posted May 04, 2005 06:03 PM  
How many of you use tire pyrometer to see what a tire is doing? If you do, did that get you any better with the set up. I have used it before on asphalt cars but not on dirt and was wondering if this will help

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