Originally Posted by SamFromTX

Have you compared the Trofeo-R to the PSC2 on your 1M? Many people say the Trofeo R is a grippier tire and I am aware it has a lower tread rating but do you know if it is indeed a faster tire? If I can get 1-2 extra secs out of them in a sub 2 mile course, it would be a no brainer for me. Why would an improvement in grip be tricky? Interested in your thoughts.

Originally Posted by GrantG

I'm a decent amateur driver (with many years of experience), but yes my car is heavily modified:

1,890 pounds with half tank
235hp 2.7RS+ MFI motor
Custom-built (by Hayden at WEVO with all their options) gearbox with close/low ratios, Guard LSD, cooler, etc.
Bilstein RSR Coilovers (replacing torsion bars), 935 rear suspension, Charlie Bars
Brembo 4-piston 930 brakes and two-piece rotors (barely clear 15" wheels)
All Carbon body panels

Makes for a fantastically involving car to drive on road and track - can be driven at huge slip angles with ease.

Originally Posted by Mike in CA

Grant, that's gorgeous!

Originally Posted by Macca

I hear good things form 997.2 GT3 owners on the Trofeo R vs old old MPSC.

Can someone point me online to who stocks the Trofeo R in 991 GT3 sizes as I cant seem to find these on tirerack.com and would like to know what they run to a set....?

Originally Posted by tripleblack

Grant, I run Hoosiers on my GT and they're stable on track. The springs are heavier and shocks have been revalved. I run MPSS on the street and they're good. Am getting Trofeo R's on a Z/28 and will have some feedback in a few weeks...but not relative to other tires on that car. By all accounts they're pretty quick on track but not quite as quick as Hoosiers and certainly not full slicks.

Originally Posted by Macca

Grant. Thats a seriously modified longhood track car with some sizeable investment! I could see how you would be quicker than me on the track in the 993 even with same driver.

However, just a quick point to make - your car is a pretty uncompromised track car.

Both my 993 and GT3 "track cars" have air con, stereo and creature comforts good for touring (my wife and I took the 993 for 4000 miles of touring and track days in March with 3000 of those road miles with 14 days luggage). We toured 2000 mile sin Europe in the 991 GT3 with heated buckets during winter and it was even more comfortable than our 993.

You mentioned that the cost of ownership of the new 991 GT3/RS for track work might be a road block for you - but Im not sure we are comparing apples with apples here - they are mostly road cars good for the weekend track - not the other way around . Just a thought to balance the argument.

Anyway thats one hell of a oldtimer, and like my 993 Im sure it probably owes you by now what a new GT3 would LOL!


Pete. Thanks for the data points on the MPSS. Thats very interesting information. I guess I will find out myself how they go in regards the 991 GT3 soon enough. I run -2.0 negative camber on the front so maybe that will help hold off the chunking for a little while. Unfortunately due to taxes and freight by the time the MPSC2 get to NZ from Tirerack they are about twice the price of the MPSS landed. The 991 GT3 has quite a different chassis from the 1M so it will be interesting how they wear. Going a bit hard is ok in summer I guess but what I read is I shouldnt expect any increase in life over the MPSC2 in similar use. A little less grip and maybe some compound changes at half time...

Sam. Your experience is probably teh most relevant here so I will go with what you say. I have 4600km (3000 miles) on my MPSC2 but very veried usage form Euro winter, to one cold session on the track, a bit of DD and one hard road raid (200 miles). Looking at them Id say they will be good for 1000 miles more touring to our Spring track tour (say 3 more track days).

One thing to note. IN NZ we run shorter session than you do. 15 mins typically (9 -10 laps). In NA you seem to all run 20-30 min sessions. This must put quite a few heat cysles through a tyre especially in summer so may aid also to quicker wearing of those fronts, once they start to melt Im sure they will wear quicker.

One thing is for sure the MPSC2 will take some beating as an "every something" tyre...

Originally Posted by Macca

Grant. Thats a seriously modified longhood track car with some sizeable investment! I could see how you would be quicker than me on the track in the 993 even with same driver.

However, just a quick point to make - your car is a pretty uncompromised track car.

Both my 993 and GT3 "track cars" have air con, stereo and creature comforts good for touring (my wife and I took the 993 for 4000 miles of touring and track days in March with 3000 of those road miles with 14 days luggage). We toured 2000 mile sin Europe in the 991 GT3 with heated buckets during winter and it was even more comfortable than our 993.

You mentioned that the cost of ownership of the new 991 GT3/RS for track work might be a road block for you - but Im not sure we are comparing apples with apples here - they are mostly road cars good for the weekend track - not the other way around . Just a thought to balance the argument.

Anyway thats one hell of a oldtimer, and like my 993 Im sure it probably owes you by now what a new GT3 would LOL!


Pete. Thanks for the data points on the MPSS. Thats very interesting information. I guess I will find out myself how they go in regards the 991 GT3 soon enough. I run -2.0 negative camber on the front so maybe that will help hold off the chunking for a little while. Unfortunately due to taxes and freight by the time the MPSC2 get to NZ from Tirerack they are about twice the price of the MPSS landed. The 991 GT3 has quite a different chassis from the 1M so it will be interesting how they wear. Going a bit hard is ok in summer I guess but what I read is I shouldnt expect any increase in life over the MPSC2 in similar use. A little less grip and maybe some compound changes at half time...

Sam. Your experience is probably teh most relevant here so I will go with what you say. I have 4600km (3000 miles) on my MPSC2 but very veried usage form Euro winter, to one cold session on the track, a bit of DD and one hard road raid (200 miles). Looking at them Id say they will be good for 1000 miles more touring to our Spring track tour (say 3 more track days).

One thing to note. IN NZ we run shorter session than you do. 15 mins typically (9 -10 laps). In NA you seem to all run 20-30 min sessions. This must put quite a few heat cysles through a tyre especially in summer so may aid also to quicker wearing of those fronts, once they start to melt Im sure they will wear quicker.

One thing is for sure the MPSC2 will take some beating as an "every something" tyre...

Originally Posted by Petevb

I have no direct experience with the Trofeo R, but I've heard the same thing re speed.

My concern is that putting the Cup 2 on was a huge change in my case. I'm sure the tire spring rate is different, not sure what else, but somehow it changed a car that was unstable in high speed sweepers over bumps into one that's stable. I'm sure you could bolt on a hoosier/ etc (sizes willing) to a GT3, but I wonder if it might upset the suspension or make it darty. Just a theory- tires are always tuned substantially for N spec, so who knows how similar the GT3 version is?

Originally Posted by Jimmy-D

Are you all happy with the stock tires for the street use, only?? I do not track my car but was just wondering

Originally Posted by Macca

Jimmy. Ive been very happy with the MPSC2s as a road/street tyre right down to conditions around 2-3C they seem pretty good to me. however if I were running this as a street/fast road car only I would almost certainly put the MPSS on after the MPSC2 are worn through as you will get better wet weather handling and durability from them at 35% less cost with almost no noticeable depreciation of performance on the street I should hope/think...

Originally Posted by fbirch

I'd be interested to learn the actual delta between an MPSC and PSS on a 2-min track. I've tracked both tires, but not on the same car. The PSS has extremely soft sidewalls and nowhere near the grip of the MPSC once both tires have some heat. I would expect to see more than 1.5-2 sec difference, so I'll be interested to hear your feedback.

Originally Posted by GrantG

I'm a decent amateur driver (with many years of experience), but yes my car is heavily modified:

1,890 pounds with half tank
235hp 2.7RS+ MFI motor
Custom-built (by Hayden at WEVO with all their options) gearbox with close/low ratios, Guard LSD, cooler, etc.
Bilstein RSR Coilovers (replacing torsion bars), 935 rear suspension, Charlie Bars
Brembo 4-piston 930 brakes and two-piece rotors (barely clear 15" wheels)
All Carbon body panels

Makes for a fantastically involving car to drive on road and track - can be driven at huge slip angles with ease.

Originally Posted by GrantG

I'm a decent amateur driver (with many years of experience), but yes my car is heavily modified:

1,890 pounds with half tank
235hp 2.7RS+ MFI motor
Custom-built (by Hayden at WEVO with all their options) gearbox with close/low ratios, Guard LSD, cooler, etc.
Bilstein RSR Coilovers (replacing torsion bars), 935 rear suspension, Charlie Bars
Brembo 4-piston 930 brakes and two-piece rotors (barely clear 15" wheels)
All Carbon body panels

Makes for a fantastically involving car to drive on road and track - can be driven at huge slip angles with ease.