Tire PSI for Pirelli slicks?
11-02-2018, 09:01 AM
#4
Race Car
anywhere between 29 to 31psi hot...kinda depending on the format of the car and the weight of it too. My car is 2900lbs so I run them 29 in the front and 30in the rear hot. I know guys with slightly heavier cars that run them as high as 32 rear but mine didn't like what the pyrometer said when i tried pressures that high.
don't go out lower than 24 at any corner first session of the day or you can hurt the tire. That ultimately means first session you will come in higher than pressures listed above and will have to bleed down hot but after that cold pressures shouldn't be an issue.
Take two full laps to let them come in before you really beat on them...they will feel like a wet noodle the first session out in the morning at low pressures. No curbs for at least the first lap and preferably the first two laps...again trying not to hurt the sidewall with low pressures.
I run nothing but scrubs and find them to be a great value and much more consistent of a tire than I had ever imagined a slick could be.
don't go out lower than 24 at any corner first session of the day or you can hurt the tire. That ultimately means first session you will come in higher than pressures listed above and will have to bleed down hot but after that cold pressures shouldn't be an issue.
Take two full laps to let them come in before you really beat on them...they will feel like a wet noodle the first session out in the morning at low pressures. No curbs for at least the first lap and preferably the first two laps...again trying not to hurt the sidewall with low pressures.
I run nothing but scrubs and find them to be a great value and much more consistent of a tire than I had ever imagined a slick could be.
11-02-2018, 11:13 AM
#5
Have gone out at 22psi cold and the rears sound and feel like the sidewall is folding over - not recommended. Best to go out around 25psi cold and then hot pit after 6-8 laps or so to bleed them down to 30/31 hot. . I agree with the above that they will feel horrible the first lap of the day. Third lap they will be ready for action.
11-02-2018, 01:23 PM
#7
Drifting
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11-02-2018, 02:51 PM
#8
Drifting
Thread Starter
Don't tell me that. These were free. I should probably just follow PRC around lol.
11-02-2018, 11:07 PM
#10
Rennlist Member
^ I've run many sets of DH on a 997.2 RS. 28-29 psi hot is where they peak. Start 25 cold, warm them up over 2 laps, come in bleed to 26 and you'll have 3-4 good laps after that.
11-03-2018, 07:31 AM
#11
Racer
Ditto on 30 psi hot. Will take 3-4 laps for them to come to temp.
Nittos- garbage. First set of track tires for my car where pirelli scrubs. Went through several sets of scrub stickers then bought a new set of nittos. OMG do I hate the car on nittos.
Pure heroin: a new set of Michelin slicks. Holy smokes!! If you can survive that first lap until they're scrubbed a bit. Yeow is there grip!!
Nittos- garbage. First set of track tires for my car where pirelli scrubs. Went through several sets of scrub stickers then bought a new set of nittos. OMG do I hate the car on nittos.
Pure heroin: a new set of Michelin slicks. Holy smokes!! If you can survive that first lap until they're scrubbed a bit. Yeow is there grip!!
11-04-2018, 06:29 AM
#12
RL Community Team
Rennlist Member
Rennlist Member
How many heat cycles are people getting out of the DH before they’re done? They have great tread depth compared to Michelin and Hankook. What’s the significance of the low pressures? Cup car guys here in Aus routinely start them at 22 and 23 cold without issue.
11-04-2018, 11:07 AM
#13
I'm likely not the best person to comment but here's my experience.I got approx 18 cycles but the rear were starting to cord. My alignment wasn't good though so I could likely get over 20 cycles before cording. With more experience I may burn them up a little quicker but that's still a lot of cycles. Max for me on Hoosiers is 12 to 14 cycles (i usually trash them after 10 because I want to go fast LOL) and they start slow and end very slow (compared to slicks). With slicks the lap times don't suffer that much but the slip gets pretty big after say 15 heat cycles. From fresh to 20 cycles I'd say 3 to 4 seconds on a track like VIR. You end up running lap times equivalent to a hoosier R7 near the end of the cycle. That's how fast they are LOL.
Agree with the others about pressure. I shoot for 31 hot/in the paddock and bleed down from a starting 24 or 25. I'm driving a 997.2 which weighs about 3100 and I'm 150 with a 100 pound roll bar so the 31 in the pits pressure is likely 32 on track. I've never hot pitted and checked pressure but that's something I really need to do. Most tire guys recommend 1 psi per 100 pounds.
If anyone knows where to get good take offs please PM me
Last edited by Fritz Flynn; 11-04-2018 at 11:36 AM.
11-04-2018, 11:20 AM
#14
Drifting
i buy used wirh 3-4 cycles and run them another 8-10 and throw them away
11-05-2018, 02:16 AM
#15
RL Community Team
Rennlist Member
Rennlist Member
I tried fresh slicks for the 1st time recently and you feel like super man I'm likely not the best person to comment but here's my experience.
I got approx 18 cycles but the rear were starting to cord. My alignment wasn't good though so I could likely get over 20 cycles before cording. With more experience I may burn them up a little quicker but that's still a lot of cycles. Max for me on Hoosiers is 12 to 14 cycles (i usually trash them after 10 because I want to go fast LOL) and they start slow and end very slow (compared to slicks). With slicks the lap times don't suffer that much but the slip gets pretty big after say 15 heat cycles. From fresh to 20 cycles I'd say 3 to 4 seconds on a track like VIR. You end up running lap times equivalent to a hoosier R7 near the end of the cycle. That's how fast they are LOL.
Agree with the others about pressure. I shoot for 31 hot/in the paddock and bleed down from a starting 24 or 25. I'm driving a 997.2 which weighs about 3100 and I'm 150 with a 100 pound roll bar so the 31 in the pits pressure is likely 32 on track. I've never hot pitted and checked pressure but that's something I really need to do. Most tire guys recommend 1 psi per 100 pounds.
If anyone knows where to get good take offs please PM me
I'm likely not the best person to comment but here's my experience.I got approx 18 cycles but the rear were starting to cord. My alignment wasn't good though so I could likely get over 20 cycles before cording. With more experience I may burn them up a little quicker but that's still a lot of cycles. Max for me on Hoosiers is 12 to 14 cycles (i usually trash them after 10 because I want to go fast LOL) and they start slow and end very slow (compared to slicks). With slicks the lap times don't suffer that much but the slip gets pretty big after say 15 heat cycles. From fresh to 20 cycles I'd say 3 to 4 seconds on a track like VIR. You end up running lap times equivalent to a hoosier R7 near the end of the cycle. That's how fast they are LOL.
Agree with the others about pressure. I shoot for 31 hot/in the paddock and bleed down from a starting 24 or 25. I'm driving a 997.2 which weighs about 3100 and I'm 150 with a 100 pound roll bar so the 31 in the pits pressure is likely 32 on track. I've never hot pitted and checked pressure but that's something I really need to do. Most tire guys recommend 1 psi per 100 pounds.
If anyone knows where to get good take offs please PM me
. I’m on my first set of slicks (take offs) with my 996 cup and I plan on running them all the way so I can learn the full scope of what to expect. Might do this a few times before “wasting” a set of green.