Dwane

How are they on your car 17"?
Much trouble to warm up?
What PSI are you running hot?
Any and All comments appreciated!
Dwane

pantera43

Dwane, if your using 17" rims it appears the rears in the MPSC's are a thing of the past. The fronts are available only from Tire Rack. Nitto NT-01 seem to be popular.

Dan

springer3

I run at the pressures shown on the decal in the engine compartment (sorry, cannot recall, but 39F 42 R is close). On track day they squeal like pigs, but I seemed to make reasonable time around the track. The do not leak. They are round and ride quite well. They are quiet on the highway. Traction is not amazing, but it is predictable and forgiving. They are safe in the wet. I have 26,000 miles on them and still have a good bit of tread left. I am running factory-original 16" rims. Overall, I am a satisfied customer.

Bill Verburg

If Tirerack has 17s it's new old stock, Michelin no longer offers PSC in any 17" size

boxsey911

It's true that they can't be found over here either...yet they are the control tyre for the Porsche Club GB championship so they must still make a few or have a stock somewhere.

excerpt from the PCGB championship regs:

Rocket Rob

Springer - I think he was asking about the MPSC (track tires), not the street version. Unless you have gotten 26K miles out of a track tire.

ThomasC2

In Sweden we can buy fresh Cup tires in 17". I just bought a new set 3 weeks ago. I like them and run them with 1,9 bar front and 2,2-2,3 rear (warm preassure) as recommended from Michelin.

Thomas

joey bagadonuts

When I ran them, I used 36 psi or 2.5 bar hot, front and rear. This was on my 3,200-lb C4 race car and determined using a probe-style pyrometer.

They have a relatively small slip angle for a track tire and this difference is quite evident during your first sesson on a cold track. Watch out for snap oversteer until you get some heat into them. Many people dislike this tire for that reason--lack of confidence and predictability; they simply needed to adjust their expectations and warm up routine.

The big advantage over other compounds is their consistency over a 20-30 minute session. Unlike most tires, MPSC's don't get nearly as greasy (slippery) as other tires when temps peak. They also last longer than, say, a Hoosier R6: 20-25 heat cycles vs 35-40 with the Cups. In light rain, they perform reasonably well--hopeless in standing water, though.

Fantastic tire. Wish they still came in 17's.

$0.02

Bill Verburg

I went to the English, French and German Michelin sites, as well as the US Michelin site, the only sizes any of them list are 18 to 20 for PSC

I think this may be the result of the EU decision last year banning some of the chemicals used in R tires, could be just a business decision too, a rotten one, JMO

Frank 993 C4S

I have been looking for MPSC for my RSA and I have never found them available for 17" so I will be going with Nitto NY01s since I can't get R888s in the US right now either. I have them on my 997 GT3 and I would echo Joey b..'s comments. The MPSCs are very consistent throughout a session and they last very well. I wish they would make them in 17"s.

Dwane

I just picked up a new set, and want to know, what to expect from these tires.
Great feedback so far.
Dwane

Bob Rouleau

Dwane - they are great tires. When new they take 2 laps to warm up at LCMT. Hot pressures are 34F 36R on your car. As you add heat cycles, they take longer to warm up because the rubber gets harder each time. I got from 25-40 heat cycles out of them on my GT3. The average was about 30. Bad tire in the wet. The tires like around 2.5 degrees negative camber in front and about 2 degs neg in back. I loved them but they are no longer available in the size I need now.
The can be driven to and from the track but be careful if it rains hard, drive slooooowly.

DaveConn

Dwane,

I'm a fan of Michelin, but I ran these for two seasons on my 964 (GP white, baby!) and I won't be running them again. The biggest issue you will have is getting these tires up to temp. IF you can get the temps where they need to be, then you will love them. But without doubt, they are the most finnicky tire I've ever had to work with, in terms of temp. and pressure.

In all of the comments you receive, keep in mind the modern cars utilize a tire MUCH differently than our cars do; knowing just enough to be dangerous, I would guess the MPSC is perfect for the mass, and suspension technology, of a GT3.

I worked a fair amount on pressures with these tires, and ended up in the low 30s for psi, with about a 2lb stagger front to rear (i.e., two pounds higher pressure in the rear). Keep in mind, if you want to be precise, you need pyrometer readings, and then you'll probably find you should run a slightly different pressure in each tire, depending on the track.

Best of luck,

Dave

swftiii

Dwayne,

Bob hit it right. I've been using this tire for about 8 years and many of the comments are accurate. I like pressures at 34/35 F/R. I find they are good to go within 1.5 laps on a 2 mile track. I have been tempted by other tires over the years, but have always stayed with MPSCs.

FYI - I run Hoosiers for club racing so have experience with those too. They are faster but don't last nearly as long.

Skip

Dwane

Thanks for the feedback Bob, Dave and Skip.
I'll be using the tires next year.
Still want to learn more about the car on street tires.
Bob, When I start with the cups, I will need your guidance!

Dwane