PS4S Steering vs PSS

[IVM3]

Originally Posted by NYG

Inner/Middle. I ran -2.8 on the M4 and had really decent temperature gradients and wear for the tracks I go to with NT01s, Cup2s, and Super Sports

Ah thanks I'm running -2.8 too. I recently switched from super sports to 4s so I'll take it easy on the track and hope i don't destroy them.

[NYG]

Originally Posted by IVM3

Ah thanks I'm running -2.8 too. I recently switched from super sports to 4s so I'll take it easy on the track and hope i don't destroy them.

Keep the pressures down. Chunking happened above 36 psi hot. I never took tire temps with 4S so that number can range a little bit but given both of our cars probably have similar weight and I abused those tires with early throttle and threshold braking I think 36 and under hot should be ok. They drove best at 31 but cold pressures were too low for comfort on those tires to get that.

[IVM3]

Originally Posted by NYG

Keep the pressures down. Chunking happened above 36 psi hot. I never took tire temps with 4S so that number can range a little bit but given both of our cars probably have similar weight and I abused those tires with early throttle and threshold braking I think 36 and under hot should be ok. They drove best at 31 but cold pressures were too low for comfort on those tires to get that.

Thanks for the tip! I was initially going to run higher pressures to firm up the sidewall as I was afraid of destroying the outer edges again. But it sounds like that wasn't an issue with -2.8 camber. I previously destroyed my super sports' outer edges before I installed camber plates.

[GarlicBread]

Anyone know if the ps4s BMW * tires are available in the 666m wheel size? It doesn't look like it?

[Trevorstein]

Originally Posted by maddmatth

Those don't fit the F8x series

It is interesting though.

Of course they do!

* 275/295

[NYG]

Originally Posted by IVM3

Thanks for the tip! I was initially going to run higher pressures to firm up the sidewall as I was afraid of destroying the outer edges again. But it sounds like that wasn't an issue with -2.8 camber. I previously destroyed my super sports' outer edges before I installed camber plates.

I'm actually going to run 4S again in about two weeks on track to get a different perspective with the R8.

[CanAutM3]

Originally Posted by NYG

My perspective from track use with both:

PS4S is overall a better tire. Great comfort, low noise, good grip in most weather conditions.

PSS is a faster tire. More precise/slightly better grip. PS4S doesn't handle heat as well - got some serious chunking with them.

You'll run faster lap times with the PSS but the PS4S is the better street tire.

That's contrary to all the reviews I've seen/read thus far.

As an example, in Motor Trend's long term M2 review, Randy Pobst was able to shave ~1sec/min lap when switching from PSS to PS4S. That's quite significant.

Originally Posted by NYG

I'm actually going to run 4S again in about two weeks on track to get a different perspective with the R8.

Looking forward to the feedback from your second take on them.

[2legit]

Ps4s feels a lot mushy and less sporty but grips way better than pss. Had ps4s for 1 year now and the steering feel is a downer. On the plus side, the car grip in both dry and wet roads is a lot better. Thinking of going to Bridgestone potentate sport next. Will most likely trade tread wear and a little grip.However, I like to enjoy my driving

[Trevorstein]

Originally Posted by 2legit

Ps4s feels a lot mushy and less sporty but grips way better than pss. Had ps4s for 1 year now and the steering feel is a downer. On the plus side, the car grip in both dry and wet roads is a lot better. Thinking of going to Bridgestone potentate sport next. Will most likely trade tread wear and a little grip.However, I like to enjoy my driving

The "Potentates" (RE-71R's) are now discontinued - (Perfect) Track Tire, though.