PatK-Mpls

I have a racecar but I also occassionally like to participate in DE's. To that end, I like to bring my GT3. It needs new rubber and I was thinking of putting Pilot Cups on it. (I drive the GT3 daily to and from work)

Any advice appreciated.

roberga

get a second set of wheels. The tires are fine for the street. They will throw stones into your wheel wells. The problem will be that after a few heat cycles the will suck in wet weather on the road.

PatK-Mpls

Thanks. That s what I feared - once the tread gets worn even a little they will hydroplane. I don;t want to get new rims. I have wheels and tires coming out my a** with the Cup car already.

What about the new Yokes or the Pirellis?

Moogle

In good weather areas, it is doable, but they will need to be replaced quite often.

Pilot Sport PS2s for the street, and PS cups for the track on another set of rims

Mr. C4

Or perhaps the Dunlop Super Sport Race could be an option for you!?

cosmos

The MPSC's will also heat cycle themsleves to death with daily use. They will become hard and handle poorly.

PatK-Mpls

While I do appreciate the feedback and advice - I do not agree that they will heat cycle themslves to death. I don't think that daily driving ever gets the tires anywhere near temp - I am assuming operating temp to be 180-220F.

cosmos

Ok, look at it this way...its like cooking a chicken. You need 140 degrees to cook a chicken, there are only so many times you can warm it up to 110 degrees before it becomes dry.

The polymers in the rubber distort and you are breaking them down, over and over again. It is just that when you do run them up to "temp" it will be more difficult to get up to the proper heat cycle temp. It wont be 180 anymore, it will be 185..190..etc. You basically kill the tire prematurely.

Also you can get them up to temp by driving on the street for about 30 mins if its more then 80 degrees outside. How hot do you think black top gets baking in the sun?

Its like running them in at the track. You CANT just go out and run a new set of tires in and say they are heat cycled. The cycled part is to let them cure...for up to 3 weeks off the car and allow them to "gas out".

There is a lot you dont know about heat cycling, so dont assume that they wont get heat cycled on the street.

Do what you want, they are your tires.

PatK-Mpls

I stand corrected - what you are saying makes sense.

Still, it is my understanding that the MPSC is designed to degrade much slower over repeated heat cycling than say, Hoosiers.

cosmos

Yes. You are correct if you are comparing them to Hoosiers. Also depends on which Hoosier. And Hoosiers breakdown slower then slicks.

PatK-Mpls

I am surprised to to read that Hoosiers breask down faster than slick - although I do not doubt you. My experience with slicks (mostly the Michelin porsche cup slicks) have been that they degrade fairly linearly relative to the Hoosiers I have driven.

Cosmos - Since I am assuming you know a bit about tires from your posts - do you knwo anything about the Yoke A048 or the Pirelli Corsa? A bi part of my hesitation in getting another set of rims is both hassle and I have a basement full of tires from the Cup car.

mooty

i would take ps2 over cup on street. you will never heat the cups up to benefit from the extra grip. heat cycled or not, they will not last as long as ps2. for the occasional few DE days you attend (i assume otherwise you are in your cup car racing), why bother with the pain?

PatK-Mpls

I am inclined to agree with you all. It is probably just not a good idea.

Holger B

I recently switched from PS2's to MPSC's. Like you, I don't want to deal with another set of wheels. After 2 track days, I don't think I'd want to use them in the wet (not an issue in my area after April).

The tires also won't heat cycle on the street, they don't get up to operating temp there.

The biggest difference I've noticed is the much stiffer sidewall. If you think the ride was firm before, these tires magnify that. Other than that, I think they work fine on the street.

GT3.my

Would the MPSC pass US DOT road tyre testing if it has a limited number of heat cycles?