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Author Topic:   Air Pressure
J3
Dirt Maniac

Total posts: 188
posted July 06, 2005 10:00 PM  
I have to run Hoosier A-40 tires. 27.5X8 or 26.5X8. Those are my only two choices, so I can't play much with staggar. What air pressure would you suggest running in tires on a pure stock car 3500#

FifteenCcrew
Dirt Roller

Total posts: 7
posted July 06, 2005 11:27 PM  
Not sure on differences but ... Regardless of D or A, 26 or 27.5 we run

LF 9 RF 14
LR 9 RR 12

leftturn73
Dirt Maniac

Total posts: 199
posted July 07, 2005 08:24 AM  
I asked one of the factory guys the run the national circuit and he suggested the following.
LF 10
LR 11-13
RF 15-18
RR 12-15

I can concer with this I ran the A40s for a couple years. The softer sidwall warrents the increased air pressures.
I would generally run the higher pressures in the heats and take two out of the back for the feature.

happy
Dirt Full Roller

Total posts: 73
posted July 07, 2005 11:42 AM  
You might want to think about running tubes with the hoosiers and that heavy of car they are real prone to rolling the bead off the rim.

msnead
Dirt Forum Racer

Total posts: 77
posted July 07, 2005 11:55 AM  
I agree with fifteen, we run:

8 14
8 12

We run this with both As or Ds. (We will occasionally take 2 out of the rear tires if the track is really soupy.)

J3
Dirt Maniac

Total posts: 188
posted July 07, 2005 10:01 PM  
quote:
Originally posted by happy:
You might want to think about running tubes with the hoosiers and that heavy of car they are real prone to rolling the bead off the rim.

Running tubes with that low of pressure will help keep the tire from breaking down? I thought that if you ran tubes, you would need to run more pressure in tire to keep it from rolling off the rim?

Kromulous
Dirt Forum Champ
Total posts: 796
posted July 08, 2005 06:52 AM  
We run Hoosier, exclusively here in the Ohio vally area, and with our car at 2500lbs, i run air pressure as high as 18lbs on the RR.


2nd2none
Dirt Forum Champ
Total posts: 755
posted July 09, 2005 12:06 AM  
call hoosier, they will give you the recommended air pressure to run. When our track switched to these tires we where having problems with blistering because we where running too low of a pressure. Hoosier stepped up and told us to increase pressures and that fixed the problem.

The reason I say call hoosier is because of the weight of your car versus a 2300# modified, they may know better what pressures to set their tires at for a 3500# car.

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