Pirelli Slicks in 19s

Discussion in 'Brakes, Wheels and Tires' started by Bill Pemberton, Nov 15, 2016.

  1. tracktardicus

    tracktardicus TMO Intermediate

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    For those of you running these tires on the GT350 in general, and the GT350R in particular, how many heat cycles do you average before they need replacing? What wheels are are you using?
     
  2. Bill Pemberton

    Bill Pemberton TMO Addict

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    This question always gets varied answers, but best to talk to folks who run the track you plan to run the most often. I sometimes would only get one weekend at one track I run , yet on another it was not unusual to get 3 weekends.
     
    Last edited: Sep 27, 2018
  3. blacksheep-1

    blacksheep-1 TMO Addict

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    True...kind of. You still must meet the performance parameters of the tire no matter what car you have, independent or stick axle..in the end, it really doesn't matter how you get to the parameters of the tire, but if you exceed those parameters, the car won't handle. The tire parameters that we use on the Mustangs, are identical to the ones we use on the GT3 Porsche..until they changed compounds which changes parameters so you get to chase it again.
     
  4. blacksheep-1

    blacksheep-1 TMO Addict

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    For those scoring at home, please remember the Pirellis drop off precipitously, they are not like Continentals or Hoosiers. They drop seconds per lap, not 1/4 seconds.
     
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  5. 06mach1

    06mach1 TMO Addict

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    I ended up running 2.5 degrees negative camber in my Boss when I ran the 305-660's. I tried 2.7 which was just a little too much. This was using tire temps and handling to find the best setting. I also ran a 18mm sway bar. For tire pressures I started with 26psi cold. Once they got hot they would run 34psi front, 33psi rear.
     
  6. j3st3r

    j3st3r Brian S.

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    Having a hard time finding any of these at the moment :(
     
  7. 06mach1

    06mach1 TMO Addict

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    What size are you having a hard time finding?
     
  8. j3st3r

    j3st3r Brian S.

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    Really any Pirelli DH 19’s, dont want 710’s but can’t find 305/645, 305/660, or 305/690
     
  9. Bill Pemberton

    Bill Pemberton TMO Addict

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    Assuming you checked with usedracingtires.com or John Berget in Wisconsin?
     
  10. j3st3r

    j3st3r Brian S.

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    Yep, sure did, there is really nothing out there for 19's right now
     
  11. Bill Pemberton

    Bill Pemberton TMO Addict

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    Somewhat typical for tires after the end of the Season for various sports car Series. May need to run something else in the meantime and if you are looking for pretty decent life and flexibility , the Michelin Pilot Sport Cup 2s are a good alternative . Sure they are more expensive , but they are less than some other alternatives. If you want even more aggressive grip , go for a Hoosier R 7.

    Otherwise , used Pirellis and likely Michelins will pop up next year as early as late February or March ( Michelin could be in greater supply as they will be the new tire of choice for what was the Continental Tire Series ).
     
  12. j3st3r

    j3st3r Brian S.

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    I already run an alternative I feel is the best option which is the the RE71. I would love to run the Hoosier R7's, but I am just not willing to spend the almost $2K for sticker Hoosiers. We have contacts at most of the teams, and have checked with them throughout, problem seems to be the Ferrari challenge series is no longer running them, and all others are on 18's, with Michelin taking over a couple other series.
     
  13. Bill Pemberton

    Bill Pemberton TMO Addict

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    Should be more choices next year and if you are running road courses more than Autocrosses , would suggest the PSC2s over the Bridgestones as they will be faster ---- and have more life than an R7 , yet not get greasy as quickly as the Bridgestones.
     
    Last edited: Oct 1, 2018
  14. 06mach1

    06mach1 TMO Addict

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    Sent you a PM
     
  15. j3st3r

    j3st3r Brian S.

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    Said it before...I would put the "hoosierstones" RE71's up against the Cup2's any day, definitely do not believe the cups would give more life than the stones.
     
  16. Bill Pemberton

    Bill Pemberton TMO Addict

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    Instruct at two tracks and with NASA , and a lot of guys around here run RE71s as they autocross and the Solo Nationals are run about 60 miles from me down in Lincoln , Nebraska. The Bridgestones are the " King of the Autocross, " with only the BFG Rival S very close in my estimation, but I can categorically state that the Cup 2s are faster on a road course, though, as you mentioned they may not last as long as the RE71s. I guess I am not sure what you are looking for , more speed or just longevity? I do know from a lot of students and friends that the only real downside with the RE71s is they get greasy , pretty fast , for accomplished drivers.

    Just throwing out alternatives and the Pirellis have been great , because if you trash one, not much cost to get another, but maybe next year with the Michelin slicks ( which are even faster than Pirellis ) being on more cars , there will be another used racing tire alternative?

    billpemberton@woodhouse.com You can always contact me here , as have access more often than the Forum.

    Thanks for the note.
     
    Last edited: Oct 1, 2018
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  17. Bill Pemberton

    Bill Pemberton TMO Addict

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    06 Mach - never got your PM , see my email listed above, that might work better.
     
  18. HR692

    HR692 TMO Intermediate

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    315 705 is all I can find anywhere...sounds too big? Can anyone confirm?
     
  19. j3st3r

    j3st3r Brian S.

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    In my opinion this would would be to big, but yeah would be open to hear if anyone has run it
     
  20. j3st3r

    j3st3r Brian S.

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    Yeah instructor here too. Really like the way the Pirellis felt on my 13, liked them much better than the Continentals. I like the RE71's a compromise from the Pirellis/Hoosiers as a reliable, fairly quick tire I can track and AutoX, and drive on street if needed. I want the Hoosiers/Pirellis for all out speed/lap times to really see what the car can do. I have noticed though the 350 is incredibly hard on outside edges even with proper inflation and as much camber as I can throw at it when really pushing the car hard. Our local track is 3.2 miles 23 turns, mostly high speed right turns, so the left sides tend to wear pretty heavy. I am hoping the DH compound can last me at least a few events between a couple of my local tracks (NCM, Barber, RA, VIR).
     

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