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Track Guys...tire pressures

 
Old 03-11-2019, 01:52 PM
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Monkey D. Luffy
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Default Track Guys...tire pressures

OK all you Track Rats, what tire pressures are you running in the Cup 2?
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Old 03-11-2019, 01:55 PM
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Most of the guys in the Optima events, me included, start between 26 & 28 while cool. When they heat up you're going to be up to 32-34 approx. Take a temp gun and check right after coming off the track and just before you go back out. You'll get her dialed in.
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Old 03-11-2019, 02:02 PM
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Originally Posted by Thomasmoto View Post
Most of the guys in the Optima events, me included, start between 26 & 28 while cool. When they heat up you're going to be up to 32-34 approx. Take a temp gun and check right after coming off the track and just before you go back out. You'll get her dialed in.
Thank You.
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Old 03-11-2019, 03:49 PM
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24/25 cold, depending on what side of the car and the circuit orientation worked great for me.
Bish
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Old 03-11-2019, 03:58 PM
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The manual states to start at 26 psi cold. I do that for the first session and adjust to 32 psi square as soon as I get back to the paddock so as the ambient temps heat up during the day my hot temps stay at 32 psi. This is the sweet spot for me.
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Old 03-11-2019, 09:40 PM
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Originally Posted by Thomasmoto View Post
Most of the guys in the Optima events, me included, start between 26 & 28 while cool. When they heat up you're going to be up to 32-34 approx. Take a temp gun and check right after coming off the track and just before you go back out. You'll get her dialed in.
what are you doing with a 'temp gun' at the track? What are you 'dialing in'? Just curious.
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Old 03-11-2019, 11:58 PM
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Same thing here, 26 cold 32 hot... keep checking after every session, you might have to keep adjusting one side or corner depending on the track config!
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Old 03-11-2019, 11:59 PM
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Originally Posted by cvp33 View Post
what are you doing with a 'temp gun' at the track? What are you 'dialing in'? Just curious.
Alignment... it shows if the inside or the outside wears more or if it's kind of even...
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Old 03-12-2019, 06:56 AM
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Originally Posted by thebishman View Post
24/25 cold, depending on what side of the car and the circuit orientation worked great for me.
Bish
Originally Posted by BLK06ZO6 View Post
The manual states to start at 26 psi cold. I do that for the first session and adjust to 32 psi square as soon as I get back to the paddock so as the ambient temps heat up during the day my hot temps stay at 32 psi. This is the sweet spot for me.
Originally Posted by JanosNFS View Post
Same thing here, 26 cold 32 hot... keep checking after every session, you might have to keep adjusting one side or corner depending on the track config!
Thanks Guys. Looks like 32 hot is the sweet spot
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Old 03-12-2019, 10:26 AM
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MustOBeenYellow2015Z
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Switching from air to nitrogen helps with tire pressure buildup.
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Old 03-12-2019, 12:27 PM
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Originally Posted by JanosNFS View Post
Alignment... it shows if the inside or the outside wears more or if it's kind of even...
I know what itís supposed to do but not sure what Z06 owners are doing at the track to adjust for this other than tire pressures. Unless you have adjustable coil overs and camber plates your logging a Ďnice to knowí versus Ďdialing in your carí. The best you can do on a stock Z06 is ensure your tire pressures are right which usually means starting 10 to 12 pounds below your peak tire pressure. RH tracks like VIR usually need 1 or 2 pounds lower on the left versus right.
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Old 03-12-2019, 12:33 PM
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BTW hereís my starting pressures for VIR with Toyo R888Rís. They donít like to be anything over 38psi or they give up grip. You also need 3/4 of a lap to have full grip.

25psi LF (right hand track)
26psi RF
29psi both rears
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Old 03-12-2019, 12:55 PM
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Originally Posted by cvp33 View Post
BTW hereís my starting pressures for VIR with Toyo R888Rís. They donít like to be anything over 38psi or they give up grip. You also need 3/4 of a lap to have full grip.

25psi LF (right hand track)
26psi RF
29psi both rears
What size Toyo's are you running?
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Old 03-12-2019, 05:36 PM
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25/26 cool and 30/31 hot. Found that to be pretty damn solid for me with the Cup2's. You can bet they are rolling on the outer sidewall!!!
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Old 03-12-2019, 08:20 PM
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I'm running 295/30/18F and 335/30/18R so probably not going to help guys running stock wheels.

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Old 03-12-2019, 09:27 PM
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what are you guys liking for the drag strip? stock mpss
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Old 03-13-2019, 09:37 AM
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Originally Posted by C5-VERT View Post
25/26 cool and 30/31 hot. Found that to be pretty damn solid for me with the Cup2's. You can bet they are rolling on the outer sidewall!!!
Thanks
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Old 03-13-2019, 09:39 AM
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Originally Posted by cvp33 View Post
I'm running 295/30/18F and 335/30/18R so probably not going to help guys running stock wheels.

Thanks! Wasn't sure they came in stock sizes.
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Old 03-13-2019, 09:19 PM
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I'm running cup 2's with nitrogen and I start at 24-25.
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Old 03-13-2019, 09:40 PM
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Originally Posted by badhabit_wb View Post
I'm running cup 2's with nitrogen and I start at 24-25.
i thought nitrogen didn't expand with heat/temp?
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