PSI for rear 315 Hoosier R6's?

[Osiris]

Hey guys I am heading to cal motor speedway this saturday. It's gonna be 75 and sunny. I have hoosier r6's 315 in the back. What PSI should they be cold / hot?

Thanks.

Shawn

 

[pcdrj]

There's definitely some personal preference here but I'd start first session 26# cold and run 32# hot as a starting point.

 

[Vorshlag-Fair]

There's definitely some personal preference here but I'd start first session 26# cold and run 32# hot as a starting point.

I like those numbers, although I've only run 315 Hoosier A6s (and Kumho V710 in the same sizes)

 

[Sam Strano]

What's on the front?????? I ran 28 in my 315's Hoosier's. A6 and R6 construction is exactly the same, compounds differ which will not effect pressure. Since it's a track you will tend to build more heat, so I'd say the 26 is a better starting point for what you are doing, but it will matter how big the wheel is, what's on the front, how the car is balanced, etc.

 

[jymontoya]

Wow. Didn't realize the R6 was that different from the Conti Grand Am scrubs...

I start at 31psi cold, and like the feel at around 38psi hot. Less than that and the outside of the tires are getting too hot and wearing quickly.

 

[NEMustang]

I was surprised by the responses...I run 30-32 cold 38-40 hot on Hoosier R6 295/35/18 all around for Road Racing. I didn't expect to see answers that indicated that I may be over pressure by 6-8 lbs!!

What is confusing is that I have seen the Z06 forums indicating similar pressures as you guys are using. Yet Hoosier used to recommend HIGHER than my pressures...the latest from their site is 23-29 cold/34-39+ hot. http://www.hoosiertire.com/pdfs/tctR6_A6.pdf

The key question for us lowly amateur corner-carvers becomes...how best to tune at the track based on what you can change? Lets assume single adjustables, maybe adjustable front sway at a minimum and tire pressures.

That's always my challenge...What is the car doing in the different phases of a corner in each direction and what do I adjust to make it 'better' for my style of driving?

 

[ArizonaGT]

Aiming for 30psi hot on my R6s, typically means starting around 24psi cold.

 

[jayel579]

It's gonna be 75 and sunny.

Screw you!

....from all of us stuck in the cold winter months now... lol

 

[Osiris]

lol i'm sorry Jayel. Well it was cloudy and it misted a few times but the line was fine. No impact on traction. On the front was BFG 285 / 18 R1's. I know people thought this was a bad idea but it worked just fine. Shaved .2 off of my best. I started the R1's at 31 cold and the R6's at 28 cold and they were good.