lawjdc

The stock rear wheels on the 997 GT3 are 12" X 19". Michelin makes the MPSC N version in 305/30, but Hoosier only makes a 295/30 in the R6 compound, and does not appear to offer a 305/30.

Which is the better choice, assuming one wanted to run the stock or stock size rims for use in DE and TT events?

Geoffrey

Check the tread width of the two tires as they will vary differently depending on manufacturer.

Veloce Raptor

Yeah, Hoosiers tend to be much wider than their stated section width.

That said, MPSC's are going to last a lot longer, so why not use them for DE's and such?

JW in Texas

I'm with Dave(VR). Use the MPSCs. When I ran an RSA in D class, I use to run the MPSCs for everything except actual qualifying & racing. That's when I went to the Hoosiers.

Bull

The Hoosier R6s are a different tire from the previous Hoosier tires and last significantly longer (and require completely different air pressures). I now find that both the MPSCs and the R6s heat cycle out before I cord them.

underpsi

How did your lap times vary between the MPSC and R6??

Veloce Raptor

Interesting. I hadn't heard this about the R6's before.

Must investigate.....

JW in Texas

That is good news on the Hoosiers. The first R6s were just coming out a couple of years ago when I bought the cupcar so I don't have any experience with them. Sounds like Hoosier has made significant progress with them since then

PS: The Michelin Cup slicks rule in the cupcar world. Nothing else even comes close

38D

I have run both the R6s and the MPSCs. I first used the R6s at the Watkins Glen club race. Now, the Hoosiers felt a ton faster, but my lap times were slower than what I would have expected (I only managed a 2:12.0 in the sprint). So for the enduro, I decided to go back to my trusty MPSCs. The set I put back on had ~24 heat cycles on them, so they were hardly in their prime. I go out in the enduro warm-up and run 2:11.5. Then in the enduro I pull a 2:10.2. So for me, even older MPSCs were way faster than Hoosier...at least on that day.

Now, given that was my very first time on Hoosiers, I decided to keep trying them. I next ran a DE event at Lime Rock. The entire 2 days I struggled to get the pressures dialed in. When I finally got the pressures where they should be, I still seemed to be getting tire temps that were too high. And my times sucked. So, after all that I ditched the R6s and went back to MPSCs.

Now, maybe I didn't give them enough time, but I just could get the Hoosier to be fast. They would feel ok, but after a few mins of driving would start to feel greasy in the rear (hey now).

So I liked the MPSCs better. From what I gather, people with heavier cars (3000lbs +) seem to like MPSCs, while people with lighter cars (2850 and under) prefer the Hoosiers.

Your results may vary.

Bull

Initially, like first 4-6 heat cycles, the R6s were faster by 1+ secs on my 993. Then they seemed fairly even on the heavy car. I have a set of each mounted up for the Cup Car and will know more in April.

I will add after reading Colin's post that until i got the temps right with the R6s, they were greasy when they got hot. In the beginning, Hoosier and their distributors were calling for 40psi hot, with a 3300lb car starting at 30-31 cold. I, and others found this to be too hot, and I got the best results on that heavy 993 with the hot temps in the 37psi area, no more than 38psi. I have heard others who like 36psi. I think it was a big adjustment for traditional Hoosier users/sellers to go that low with their suggested pressures after the old Hoosiers, which wanted much more pressure.

I remember being at Lime rock when Colin was having problems with the R6 temps, and agreeing that it wasn't worth the effort when the MPSCs worked so well for him. I ended up buying some new R6s from him as i recall.

paradisenb

Are any of you guys familar with a NEW BF Goodrich Comp TA R1 (DOT). These are not the old drag tires but, something pretty new. I was told they are very good.

George A

I thought it was joke until I Google'd it. Here is what I found:

http://www.bfgoodrichtires.com/overv...e-r1/3824.html

Looks like only 911 18 inch sizes. Interesting..................

G.

paradisenb

lawjdc, I thought the BFs might offer a third option but, according to their literature, (thanks for the link george) they are not making anything that will fit your car.
I was told they were as good or better than MPSC and less $$. MPSCs are getting over the top.

underpsi

I guess it sounds like going to the hoosiers may not be advantagous for me. Have you tried running the Corsas? I seem to like the Corsas better than the MPSC, during mosport i did 1:34s in my C class 3.6T but now i'm no the yokos 048s and they feel even better but have not be officially timed.

Ed Newman

At the WG club race this year, I ran 2-3 seconds FASTER on the Hoosiers. Before i go any father I will say that I am comparing MPSCs in 225/285 vs HR6s in 245/305. Also keep in mind that different cars with different weights and different suspension settings will produce different results. I know the MPSC's like ALOT of camber and the Hoosers will perform better with less. I know on my car, I run a much lower pressure on the Hoosiers that they recommend. I also know that it is easier to drive the MPSCs at their limit (more forgiving) than the Hoosiers (R6s). I ran through 3 sets of R6's last year so I have a good feel for them. To really make a determination, you need to try both tires back to back with enough time to vet out the right setup for each. I prefer and seem to be faster on the Hoosier R6s.