Tires track pressures for CS and Michelin Pilot Super Sport

F430GT (fellow Fchatter) recommends 30 fnt/32 rear cold pressures. These will be adjusted, of course, according to your track, driving habits, etc. Stock pressures (according to tire sticker in passenger doorframe) are something like 32 front 30 rear. I'm sure you'll have some others with more info chime in.

This one of F430GT's replies to a similar question I had - "For Florida weather (if that's your location), go with Michelin Pilot Super Sports (235/35R19 and 295/35R19). It rains a lot down here. Tire pressures for the Michelin (Cold): 30 psi front 32 psi rear. Hot pressures (at the racetrack) 32 psi front and 34 psi rear, so you need to start 4 psi to 8 psi lower on cold pressures depending on how hot is the weather."

 

The same advice is true for RE-11s. Just be sure to warm up the tires before trying to rip around corners at the track, since you will be starting at very low pressures.

 

I just put the same sized MPSS's on my CS about a month ago. F430GT's post was made prior to Michelin putting out stock sized tires for the CS.

Please post up what pressures gave you the best results when you can.

cheers!

 

So is it better to stay with original Pirelli corsa tires for tracking and street use?

 

I have two cars on MPSS, and I'm already on my 3rd set. I did data acquisition comparison between the Pirelli Corsa System in my Scuderia, the Bridgestone RE11, the Toyo R888 and the Hoosier A6. The Corsa was the slowest tire.

My fastest lap on MPSS tires at Homestead is just 2.3 secs behind my fastest lap on a full race tire (Hoosier R6) with my Cayman S.

You can also check the results from One Lap of America for 2012 and 2013, these MPSS were pulling 1.1G on a dry skid pad after thousand of miles on streets and many racetrack events, they even pulled 0.85g on a fully wet skid pad.

When the 360 Stradale was tested, the most it pulled on a skid pad was 0.95g, matching the same g-forces as the 996 GT3 on Michelin PS2 tires.

The MPSS is a high grip street tire that works well in many conditions, including rain, but it is not a racetrack tire, it performs well on a variety of scenarios.

The F12 currently holds the lap record for a Ferrari street car around Fiorano, and it uses MPSS. The 599GTO (it came to the market after the Scuderia) is also equipped with MPSS. The 458 Italia is on MPSS. Even the Porsche 991 Carrera S with its super fast Nurburgring lap of 7:37.9 is on MPSS (this lap beats the Scuderia and 360CS, despite of the 991 being heavier and less powerful).

For dedicated track use, there are much better tires. The fastest track tire that can be driven to the racetrack is the Pirelli Trofeo R, I have driven them at two events and I like them a lot. However, non-street legal track tires are even faster, my favorite for durability and performance are the 458 size Pirelli slicks from the Challenge series, not the fastest slicks, but plenty fast.

2.1 bar (30 psi) is a little low, the PSS works nicely at 32psi front and 34 psi rear on hot pressures. They start getting greasy (losing grip) if pressure get in the 36-38psi range and up. On hot days I have seen my street tires gain 14 psi from cold pressures to hot pressures on a racetrack.

Your car seems to understeer a lot on corner entry. The 360 does understeer a lot, that's why I recommend a 235 front MPSS combined with a 285 rear MPSS.

The MPSS is a perfectly balanced and predictable tire for all conditons (it is a Summer tire). It is not a dedicated track tire. I use it to warm up to a racetrack and save my race tires for the time sessions (time trials).

Awesome video!!!

 

Cool video indeed! How did you get the sound so clear without wind, but also mount the camera outside?

 

I took my Scuderia to the track for the first time a few weekends ago and noticed that there was a lot of early ABS intervention with the Corsa system tires as well. I'm used to running a GT3 with the OEM Porche sport cups tires (which are not really that great either) and found the corsa tires to be worse than the MPSCs, especially during braking.

The car was really awesome on track besides that. I didn't really go any faster than in the GT3 (took it reasonably easy as I really don't know the car yet) but the fun factor was a lot higher. It also seemed like it was easier getting consistently reasonably good lap times in the Scuderia.

F430GT, how would you say that the super sports compare to the OEM corsa system on a track? Better or worse? And if possible, compared to the Porsche OEM sport cups?

 

On the Scuderia I have tested the following tires:

1 set of Pirelli Corsa System
2 sets of RE11
5 sets of Toyo R888
Over 8 sets of Hoosier A6
1 set of Hoosier R6
1 set of Pirelli slicks (458 Challenge sizes)
1 set of Pirelli Trofeo
1 set of Pirelli Trofeo R
1 set of Michelin Pilot Super Sport
1 set of Michelin Pilot Sport Cup

The worst tires from the list above were the OEM Pirelli Corsa System, and I bought the car brand new, so the tires were in prime conditions.

The Hoosiers and the slicks cannot be driven on the streets, only on the track, so I would just compare the other tires.

Trofeo R > Trofeo > R888 > MPSC > RE11 > MPSS > Corsa System

Notice that RE11 are faster than the Michelin Pilot Super Sport, but the MPSS is so amazing in the rain and wet conditions, that it is a perfect all-around tire. From this list, only the RE11 and MPSS are true street tires, the other tires age from heat cycles and they lose their grip. My Trofeo tires last 16 heat cycles, supposedly the Trofeo R can take 20 heat cycles. R888 are trash at 16 HC, Corsa System and MPSC are trash at 24 HC. On warm weather and highway speeds, these tires would waste a heat cycle.

There are faster true street tires than the RE11 and MPSS, they are the Yoko ADV08, Hankook RS3, Dunlop Direzza Z2, Bridgestone RE11, and BFG Rival. These faster tires are not available in good sizes for the Scuderia, but they are available on sizes for the standard Modena (on 18" wheels).

OEM GT3 MPSC are faster than RE11, MPSS, Corsa System.

 

If you have a trailer, you can tow the car to the racetrack and use true track tires, like Pirelli Slicks, Michelin Slicks, Yoko Slicks, Hoosier A6/R6/Slicks, and plenty other (avon, GY, etc).

But if you drive to the track on the tires, the fastest tire today that is street compatible (just to go/return from the racetrack, not a permanent street tire) is the Pirelli Trofeo R. It is very impressive and it is very fast.

Based on your driving lines and inputs from your video, you should really go for a set of Trofeo R. Get another set of wheels, run half day on Michelin PSS, the other half on Trofeo R and compare lap times. I do this all the time, run 2 different sets of tires per day and take notes.

The MPSS screams (makes noises) too early, you can push more even when they make noise, and they still grip more. The Corsa and the MPSC don't make noises, when they do they are about to lose grip.

If you want to make the MPSS even faster, shave them down to 5/32" tread, they will be faster. This is one trick Ferrari have used with the 599 GTO, and some of the 458 Italia media-specials.

 

Did you just route the mic cable and secure it with blue/painters tape or something?

 

Edge bubbling, awesome from the track

 

I installed mpss on my Scud around 6 months ago, I'm very happy with them for fast road use, very nice on the wet (even if not as predictable as i expected), but just good for track use.
I haven't tried them enough yet but i noticed as soon as they rich the 2.3-2.4 bar range they start to make the car float and understeer a lot on corners entry.. Maybe because i live in a warm aerea and then they gain a lot of pressure quickly on the track. The original corsa system weren't gaining as much pressure on my tests when hot.

Inviato dal mio GT-N7100 con Tapatalk 2

 

Do you have any experience with the Mpsc, mpsc+ and dunlop sport maxx race?

Afaik mpsc is the fastest and most reliable street legal tire in dry conditions in europe.

 

From the info posted previously, I think that the Pirelli Trofeo R would be the ideal choice for me. I have 2 sets of rims, but would still drive to the track on my track tyres.

Obviously the stock sizes are Front 215/45/18 and rear 275/40/18. The Trofeo R's don't match these sizes. The nearest being 235/40/18 and 265/40/18. Would these be suitable? Any effect on TC, ABS and indicated mph?

Many thanks for the useful information on this thread.

 

The fastest street legal tire is the Pirelli Trofeo R (the Trofeo was even faster but not made anymore).

I have a set of MPSC for the Scuderia 265/325 (the race spec MPSC, not the lower grip Porsche N-Spec), and I also ran MPSC and MPSC N-Spec in my 996 GT3 and 997 GT3 RS.

The Dunlop Sport Maxx Race must be really fast, Porsche is claiming same lap times on them compared to the new MPSC-2 tested with the 991 GT3. On these Dunlops, the Mercedes C63 lapped LAguna Seca faster than the SLS (the halo car from MB right now).

I'm going to give the Dunlop a try. Not interested yet on MPSC2, I have too many tires stored and too little time to play.