Orthojoe's GT4 track thread and ramblings
#316
I found the same on the first two sets of mpsc2s but the Trofeo R's are the opposite. The rears are almost down to the tread wear markers after only 2.5 Trackdays ( the 0.5 due to rain) whereas the fronts look about half worn if that, and the shoulders holding up well with 2.5 camber.
Another newbie question.... I know you don't like the Trofeo R's Joe...but if the Trofeos fronts are good and the mpsc2 rears are good, could one run that mix? Ie Trofeo fronts and Mpsc2 rears? I've noticed that the mpsc2s make the car Understeer whereas the Trofeos oversteer...so in both cases the Tyres losing grip are the ones wearing.
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
Another newbie question.... I know you don't like the Trofeo R's Joe...but if the Trofeos fronts are good and the mpsc2 rears are good, could one run that mix? Ie Trofeo fronts and Mpsc2 rears? I've noticed that the mpsc2s make the car Understeer whereas the Trofeos oversteer...so in both cases the Tyres losing grip are the ones wearing.
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
#317
I found the same on the first two sets of mpsc2s but the Trofeo R's are the opposite. The rears are almost down to the tread wear markers after only 2.5 Trackdays ( the 0.5 due to rain) whereas the fronts look about half worn if that, and the shoulders holding up well with 2.5 camber.
Another newbie question.... I know you don't like the Trofeo R's Joe...but if the Trofeos fronts are good and the mpsc2 rears are good, could one run that mix? Ie Trofeo fronts and Mpsc2 rears? I've noticed that the mpsc2s make the car Understeer whereas the Trofeos oversteer...so in both cases the Tyres losing grip are the ones wearing.
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
Another newbie question.... I know you don't like the Trofeo R's Joe...but if the Trofeos fronts are good and the mpsc2 rears are good, could one run that mix? Ie Trofeo fronts and Mpsc2 rears? I've noticed that the mpsc2s make the car Understeer whereas the Trofeos oversteer...so in both cases the Tyres losing grip are the ones wearing.
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
#318
I found the same on the first two sets of mpsc2s but the Trofeo R's are the opposite. The rears are almost down to the tread wear markers after only 2.5 Trackdays ( the 0.5 due to rain) whereas the fronts look about half worn if that, and the shoulders holding up well with 2.5 camber.
Another newbie question.... I know you don't like the Trofeo R's Joe...but if the Trofeos fronts are good and the mpsc2 rears are good, could one run that mix? Ie Trofeo fronts and Mpsc2 rears? I've noticed that the mpsc2s make the car Understeer whereas the Trofeos oversteer...so in both cases the Tyres losing grip are the ones wearing.
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
Another newbie question.... I know you don't like the Trofeo R's Joe...but if the Trofeos fronts are good and the mpsc2 rears are good, could one run that mix? Ie Trofeo fronts and Mpsc2 rears? I've noticed that the mpsc2s make the car Understeer whereas the Trofeos oversteer...so in both cases the Tyres losing grip are the ones wearing.
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
#319
You should really clean your garage. And your car. Disgusting!
On topic: It's a shame the GT4 didn't come standard with 19" wheels. This OEM predilection for over-sized boat anchors is unfortunate.
On topic: It's a shame the GT4 didn't come standard with 19" wheels. This OEM predilection for over-sized boat anchors is unfortunate.
#320
#322
I found the same on the first two sets of mpsc2s but the Trofeo R's are the opposite. The rears are almost down to the tread wear markers after only 2.5 Trackdays ( the 0.5 due to rain) whereas the fronts look about half worn if that, and the shoulders holding up well with 2.5 camber.
Another newbie question.... I know you don't like the Trofeo R's Joe...but if the Trofeos fronts are good and the mpsc2 rears are good, could one run that mix? Ie Trofeo fronts and Mpsc2 rears? I've noticed that the mpsc2s make the car Understeer whereas the Trofeos oversteer...so in both cases the Tyres losing grip are the ones wearing.
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
If there's no reason not to try, then I'd put them on and adjust the sway bars to compensate for any Understeer/oversteer that may occur. (I'd prefer to keep the original wheels rather than going to 19s if I could)
Damn it. That looks awesome. I remember running NT01s and having wear like that. Although, your higher spring rates could account for the nice even wear?
Last edited by orthojoe; 04-26-2016 at 12:02 PM.
#323
I'd had the bars F soft, R med with the MSPC2s. We hardened the front to medium and that cured the turn in oversteer, and the feeling like the tyres were rolling over on the shoulders, but then had understeer on exit. Hardening the rear bar solved this so I'm happy with the way it now handles. Seemed pretty good in the rain yesterday too.
Maybe... but I might wait like Joe. Don't have the room to store 4 OEM wheels, two half worn sets of rears...
#324
Love the wear pattern and hopefully the tyres handled the same throughout the 22 HCs, Great for a track only car, but if this were a dual duty car, those tyres wouldn't be legal for the road.... am I missing something? Perhaps cost, I have no idea on the cost difference...
Different tire widths and diameters will affect total grip levels and of course aesthetics, but not broader grip characteristics. For example, if one tire is significantly grippier than the other in the rain due to its groove pattern, you could end up with a very loose front or rear in that situation, and in fact the OPPOSITE end would probably be loose on the track in the dry because more grooves for improved wet traction typically means smaller contiguous contact blocks, although of course the compound of the rubber itself has to be taken into account. And then there are differences like how quickly grip falls away once you've exceeded the limit. I'm fine running different widths/diameters front to rear, but not completely different compounds and tire designs.
Last edited by jphughan; 04-26-2016 at 10:32 AM.
#325
Dunlops wear more evenly across the thread. Performance about the same.
Wear slightly quicker but the difference could be less as I improved the car setup for tire wear.
Only draw back is the climb higher in PSI.
But only if pushed very hard.
I didn't mind the Dunlops as I got them because there were no MPSC2 avail at the time.
Wear slightly quicker but the difference could be less as I improved the car setup for tire wear.
Only draw back is the climb higher in PSI.
But only if pushed very hard.
I didn't mind the Dunlops as I got them because there were no MPSC2 avail at the time.
BTW, what pressures do y'all recommend for track use with the RE-71Rs (both hot and starting cold)? Thanks!
#329
Nice! That's some good work, Joe. Mine looked similar to that after 10-12 but then I dropped the pressures to 29 hot and the wear evened out and moved to the edges. 33-34 was too much it seems. DSC Sport unit helped last time out with wear a little as well.
#330
Yes, I had been told by someone that the dunlops were designed to run at higher pressures than the cup2. However, as I hear more and more, it appears that the information was not correct. One of these days I might give the dunlops another shot