KBS911

Just thinking. Nothing else to do for 4 months till my car gets here.

Would putting Michelin PS2's on when I get the car change driving dynamics much. I was thinking about putting on the new tires for break in and street driving and saving the cup tires for the track. No flames please, just wondering if it would upset the balance/handling of the car?

sws1

That's what I do. Handling gains are not all that much with MPSCs, but you get much better life with PS2s. You shouldn't really even get to the limit of PS2s on street anyway. Even on track, some say MPSC is only a little better than PS2.

My vote is you won't notice a difference at all, other than less money spent on tires.

KBS911

Good to know. I also hear that the cups are a a bit of a challenge in the wet.
Thanks

fc-racer

One of the greatest joys of driving is to drive a Porsche fast in the wet with the wipers on the hyper fast setting. The cup tires rob us of that opportunity, especially on the track. Once my new set of cups wear out, I'm going to try a set of PS2's.

YearOne

This is definitely dependent on where you drive and how hard but for me the PS2s ruined my GT3 for me. I live in the UK and drive hard on twisty country roads but the set up I had for my Toyo 888s was horrible on PS2s. Theoretically PS2s should have been more 'fun' as I like to have a car that moves around and can be drifted but they just understeered horribly. I imagine that in general this wont be a problem but for me it was bad and needed a new set up which I didn't get around to doing. Before I could pitch the car in at slow speeds and transfer the weight to the front loosening the rear but with PS2s the front just pushed and ruined the balance. I think I drive differently to most people on the road!

Id try the road Pirellis if I was doing it again.

RonCT

Lots of posts on the "faux" PSCup that comes on the GT3. I've run them, as well as RA1s, R888, real 18" Cups, PS2s, etc. The 19" GT3 Cups are fine in the rain, probably due to their use of PS2 compound and double wide rain channels (great thread on that here at RennList showing a real 235x19" cup and a Porsche 235x19" Cup). Based on my TraqMate data, there's extremely little difference in lateral or braking grip in 235/305 PS2 vs. 235/305 PSCup. No real reason to switch to PS2 unless you get a killer deal on a set.

OldGuy

Ron can you post a link to the tire thread with the pics of a REAL cup and the Porsche Cup?

rodjac

I did my first few track days in my 996 gt3 with PS2 tires and thought they were a great tire--good on the street and good at the track. I later switched to Cups and noticed some improvement (enough to stick with the r-compound tires--I especially liked the improved braking) but was not blown away compared to the PS2 experience. If you don't have a lot of track experience I would start out on the PS2.

RonCT

I've posted plenty in addition based on conversations and things I've read...

https://rennlist.com/forums/wheel-an...he-n-spec.html

rodjac - remember, the 18" Cups are the real deal, where the 19" Porsche N-specification are not (more like the PS2 than the real cups).

rodjac

RonCT--Thanks for the reminder on the difference between the 18 and 19 inch cups. I tend to forget it until I get my GT2 on the track. The 19 inch ones are clearly not the real deal.