scott40

I am planning on moving from Hoosier R6s to P Zero slicks for my Cayman Interseries. That is the tire the series is running. My car came with the R6s and that's what I bought and ran last year.

I've not driven on full slicks before. What can I expect in terms of the number of heat cycles I can get out of them? Is warm up similar to the R6s? From posts I've read, some say much better grip and more forgiving, some say less forgiving.

Veloce Raptor

If you're running the DH (hard) slicks, they will take longer to come up, but the grip is incredible when they do (compared with R6's). Almost a leap of faith trusting that the car has THAT much more stick. They will last a long time, and will also be effective for a good number of cycles. How many? Depends on your set up, driving style, etc. Expect similar cycling to R6 and you won't be disappointed IMO...and if you are a clean driver, they may pleasantly surprise you with longevity.

IMO they are pretty forgiving for a true slick.

stujelly

As long as the tires dont get exposed to extreme cold I have seen 18 hc out of them on the cayman with tread still left.

I switched from the R6 to the pzero on the RS and the grip was amazing.

You are going to love the pzero.

Good luck with frisby, they do a good job.

CRex

Second the above opinions--the grip is amazing while it lasts. Getting the right hot psi is the trick. I haven't quite found mine yet, but am gravitating towards 30/31 F/R for a 3,200lbs 997 (wet weight + driver).

For others, what pressures have worked for you??

Another thing: you can flog R6s almost immediately on the out lap (not that you should, but you could...) but with DH's you need at least 2-3 laps at increasing pace. The DH's will end up a 1-1.5 secs faster than well-driven R6's. Beyond that, like VR said, is a leap of faith... I haven't been there yet

scott40

Thanks guys- going to give Frisby a call today.

Stujelly- any fitment issues making the switch?

ZSA Motorsport

less.

jayhawk

i scored some DH Pirellis that were Ferrari Challenge take offs last year. I ran them at Hallett last year in October where it was fairly chilly and found it almost impossible to get enough heat in them. Cold, they are hockey pucks. great tires for the hot weather tho, and they look like they will last a long time for me.

Cant wait for June!!

b

analogmike

I have a set of Pirellis that came in too late for Lime Rock.

285/645-18 medium compound and the 315/675-18 DH,
I will ship for free if you want them.

CRex

I presume you mean less pressure? These things get squirmish for me below 29...

IcemanG17

I run scrub Pirelli DH's for a long time on my 928........I run the 275/645-18 DH all around....they do take longer to come up to temp, can be VERY long in cold weather......but in hot weather they are AWESOME.... It was about 90F at Thunderhill this weekend and it only took a little bit of time on the skidpad to get them going before the 1st session..... I got a full weekend of racing out of a set and they still look pretty good....

I try to set my hot pressures right at 30psi.....Pirelli recommends up to 36psi front for front engine rear drive cars...but I can feel the loss of grip above 32psi....just a touch more skatey to me.....the car handles great at 30-30

I also think they are VERY easy to control at the limit.....you can run large slip angles and slide the car while still maintaining a high overall level of grip....

CRex

Thanks that's spot on with my own experience. I have a heavier car hence the difference of a pound or two front->back. Cheers.

scott40

Thanks for the info- just got a set for my car yesterday. Where do you start cold?

bgiere

Scott, sorry I missed you today...what happened? I was looking forward to the ride w/you!

IcemanG17

I recall Pirelli recommends 22-24psi.....I think they target 30 hot..... At least I have found they seem to perform best around 30 hot.....

I went out at 26psi cold for my first session last week....came in at 35!!!! WOW...wasn't expecting that much of a jump and explained why the tires seemed so cycled out to me!!! Dropped to 30psi and they were fine for the rest of the weekend....

scott40

Perfect. Thank you!