Tubeless tire pressure

NOVALOU · 06-07-2015, 10:50 PM

Quote:

Originally Posted by Mike V

I recently changed to tubeless slicks,Hoosier 29 x 9 (bias ply).The car is an automatic weighing 3300 pounds.I am still running 12.75 pounds of air.But after looking at this picture I think I need to raise the pressure.Any suggestions of where the pressure should be?

What does the car usually 60' like? Definitely more pressure, the tire looks like it's trying to roll over itself.

I would up the pressure a bit, work towards 13-14lbs., and maybe make a shock adjustment if needed also.

I'm no expert though.

Mike V · 06-07-2015, 11:34 PM

Quote:

Originally Posted by NOVALOU

What does the car usually 60' like? Definitely more pressure, the tire looks like it's trying to roll over itself.

I would up the pressure a bit, work towards 13-14lbs., and maybe make a shock adjustment if needed also.

I'm no expert though.

Usually low to mid 1.60's. I will have to up the pressure and mess with the rear shocks.I see a day of testing in my future. Thanks

Kegracing · 06-12-2015, 10:29 PM

Mike,

I run 29.5x9 bias or 28x10 bias on my 67 Firebird when bracket racing. Also run radials at times, but summer heat in TX, I trust the bias more.

I weigh 3350 and 60' 1.48-1.52 depending on track and launch rpm... I normally run about 14 psi in the bias tires. Normally on 10" rim. 20 psi in the radials. Auto with 5200 rpm converter. Footbrake. GM ZZ4 legal crate motor.

Hope this helps. Good luck.

Ken

Stock 412

Dave Muller · 06-12-2015, 10:38 PM

I used to run 14 PSI or less in my 10.5 bias ply slicks. Now I run 20 pounds, I found that the higher I go the more reliably it hooks.

I don't doubt it would be okay with more pressure but it's been so long since they've spun that I stopped experimenting.

06-12-2015, 10:29 PM	#3
Kegracing Member Join Date: Jun 2002 Location: Red Oak, TX Posts: 441 Likes: 0 Liked 0 Times in 0 Posts	Re: Tubeless tire pressure Mike, I run 29.5x9 bias or 28x10 bias on my 67 Firebird when bracket racing. Also run radials at times, but summer heat in TX, I trust the bias more. I weigh 3350 and 60' 1.48-1.52 depending on track and launch rpm... I normally run about 14 psi in the bias tires. Normally on 10" rim. 20 psi in the radials. Auto with 5200 rpm converter. Footbrake. GM ZZ4 legal crate motor. Hope this helps. Good luck. Ken Stock 412

06-12-2015, 10:38 PM	#4
Dave Muller Member Join Date: Apr 2014 Location: Mesa, AZ Posts: 497 Likes: 162 Liked 223 Times in 73 Posts	Re: Tubeless tire pressure I used to run 14 PSI or less in my 10.5 bias ply slicks. Now I run 20 pounds, I found that the higher I go the more reliably it hooks. I don't doubt it would be okay with more pressure but it's been so long since they've spun that I stopped experimenting.