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    ? on running above 150

    you guys in germany have lots of time 150-190. do you take special care of your tyres?

    i'm going to be running thru Nevada at 140-ish to go run the 100 mi. highway races, where, depending on your safety eqpt, you can run over 200. i do not plan to run above 185.

    generally the guys racing run new/almost tyres, as a precaution against tyre trouble. how many miles are you autobann bombers putting on a set at very high speeds?

    and any issues w/ your pccb at speed? [my car is gt2]

    thank you for your knowledge.

    watt

    Re: ? on running above 150

    Quote:
    you guys in germany have lots of time 150-190. do you take special care of your tyres?

    i'm going to be running thru Nevada at 140-ish to go run the 100 mi. highway races, where, depending on your safety eqpt, you can run over 200. i do not plan to run above 185.

    generally the guys racing run new/almost tyres, as a precaution against tyre trouble. how many miles are you autobann bombers putting on a set at very high speeds?

    and any issues w/ your pccb at speed? [my car is gt2]

    thank you for your knowledge.

    watt



    I'll give it a try:

    1. are you 100% you always treated your tires right (always correct tire pressure, never driven over boardwalk, etc.)? If you sometimes parked your car driving over the boardwalk or other similar things, your tires might be already damaged.
    Same applies if you didn't drive the car with the manufacturer recommended settings all the time.
    2. did you ever lower the tire for track racing? If yes, there is a risk that your tires are damaged.
    3. did you check the undercarriage of the car for damages (incl. damages to the front spoiler and wheel carrier)? A crack in the front spoiler mounts under the car could result in losing the front spoiler at high speeds, resulting in a greater risk of an accident.
    4. did you ever take the tires (or just one tire) off the rims and put it on again? Porsche doesn't approve such thing because the tires can be invisibly damaged during the mounting process.

    Correct tire pressure for high speed runs is around 0.2 bar over the maximum manufacturer indicated tire pressure.

    I don't think there are any specific problems with the PCCB at high speeds but don't expect a shorter braking distance compared to the standard brake.

    I hope this helps a little bit.
    To give you an example how important the right tire pressure is: when I got my speed limit raised on my E55 AMG from 250 kph to 300 kph by AMG in Germany, they changed the required tire pressure from maximum 2.8 front and 2.8 rear to maximum 3.1 front and 3.4 rear! Otherwise the tire gets too hot and can blow.

    Re: ? on running above 150

    thank you RC.

    in pounds, the factory gt2 recommended air is 32/39. around the mountains [0-120], i run 31/37 which handles much better. it sounds like at speed, i should run 34/42?

    and my mech is doing full inspection... i will run on the roads with factory installed mich. pilots w/ 1500 miles, then switch to nitrogen filled new mich on factory wheels for practise and the runs...
    w/ safety eqpt...

     
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