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Michelin Pilot Sport 4 enroute

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Old 03-20-2017, 08:13 PM   #16
CodeRed
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Your installer is probably right...OEM pressures are for a fully loaded car usually. Give a detailed review. I have Cup2s on my turbo, but need new tires for the C63s soon...these are a good candidate.
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Old 03-20-2017, 08:32 PM   #17
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UPS delivered mine today. Need to have them mounted. Also need to return the stowaway.
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Old 03-20-2017, 09:34 PM   #18
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As luck would have it took a nail in the sidewall of the rear P Zero and I am getting rid of them finally.

My car doesn't get used very much as I travel for business and have several P cars to choose from but I did order the PS4 today so telll me grip in dry and if there quiet ?

Ian
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Old 03-21-2017, 10:45 AM   #19
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Quote:
Originally Posted by caslca View Post
Mine went on today as well and so far feel great!
OP, did you get recommendation on inflation? My installer (who also did alignment check) recommended 36/40 psi when cold, which is a tad lower than the OEM (37/45).
The best way to get recommendations is to contact the tire manufacturer's support email in Germany.

In the U.S. they will never say anything else than the car manufacturer's default. The tire manufacturers usually like to go lower even for a loaded car because the high pressure from the car company was dictated by fuel consumption and the tire company wants you to have a better ride and better grip. If you have a 911 with a single person inside you probably want to go quite a bit lower for best grip. The steering feel will be affected pretty early, it is quite safe to try a few values around the block.
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Old 03-21-2017, 08:49 PM   #20
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Quote:
Originally Posted by caslca
Mine went on today as well and so far feel great!
OP, did you get recommendation on inflation? My installer (who also did alignment check) recommended 36/40 psi when cold, which is a tad lower than the OEM (37/45).
I did 36/39 cold but not sure what the exact PSI should be on a 245/325
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Old 03-22-2017, 03:17 AM   #21
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Don't run those pressures if you're intending to push *hard* or track - drop them a bit. 34/40 to 36/42 should be fine.
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Old 03-25-2017, 12:35 PM   #22
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Got my installed. Wow, so much more sticky than my old tires. Love them already. Seem a little quieter too.
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Old 03-26-2017, 04:47 AM   #23
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I don't know about these pressures. Sure, for the street where you are no where near the limit of these cars, stick around the recommended pressures. But having run PS2s, PSSs, PSCs and PSC2s on the track, none of these tires were any good above 36psi hot. Now maybe these are different, but if the rest of their line is any indication you probably want to run around 34F 36R to get the maximum performance out of these. Now I don't work for michelin and I don't claim to be a tire expert but having over 8k track kms on my turbo I'm very aware of the difference between the recommendation on the door label vs what's the best in terms of performance, for all the tires listed above, the sweet spot seems to be around 35-36 psi. They all get greasy above 38.
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Old 03-26-2017, 05:20 AM   #24
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I have long suspected that Porsche's higher recommended street pressures were to improve mpg and prevent wheel damage from potholes.
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Old 03-26-2017, 03:01 PM   #25
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This is from Michelin. They definitely get greasy above 38 - I've had a few spins off the track as a result of staying out too long and not taking a break to bleed a bit of air.
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