Quote:
Originally Posted by jsimon7777
My experience on the FR-S is that the PSS are better cold than the Primacy. Once heated up on the track, the Primacy grip pretty well, far better than they do when cold on the street. I've not taken the PSS to the track on the FR-S, but on my 550i, the PSS got greasy when heated up. There was also some driver here, can't remember who, who gathered data that said how, at the limit on the track, the properly warmed PSS and Primacy were equal in grip.
That is why, for the street, I use PSS. For the track, I use Primacy. Lightly used Primacy are cheap. If I wanted to go faster at the track, I'd go with something like the RS3.
Primacy are really fun track tires. When warmed up, they clearly communicate their limits.
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PSS seem to be much more temperature and pressure sensitive which is a good reason to monitor both during your time at the track. I've not been able to overheat my 235s on the track yet (after getting pressure dialed in correctly) but I'll likely get there with more seat time. This may be a reason to get out of the 215/225 range and move up a tire size or two.
I played around with my Primacys once there and was definitely left wanting more grip. The progressiveness is nice but it feels much easier to outdrive traction on these IMO.