Mclaren - track day tyre choice
Discussion
isaldiri said:
Tispkj - thread hijack as I didn't want to post on the porsche forum given it's uh not about a porsche.
Re track tyres
You cannot find toyos in the correct rear sizes for the 12c anyway. Cup2s or Trofeo R (make sure it's the 650 approved 99Y load rated trofeo than the 103Y rated one used on the P1) are your best bet and always run the car in track mode suspension. There is not a lot of clearance between the rear diffusor and tyres, especially so if you have the cf diffusor and the 12c doesn't really like square shouldered rear tyres and has been known to either damage the tyre arch linings (expensive) or even the diffusor (very expensive if cf).
If you are prepared to run 10mm spacers at the rear it should definitely be fine for any 305 section trofeo/cup2, possibly even the wider 315 toyo. I will be running cup2s in oem sizes in march without spacers on my car which possibly is a risk but will see how it goes.
Hi Isaldiri thought would start another thread for future searches.Re track tyres
You cannot find toyos in the correct rear sizes for the 12c anyway. Cup2s or Trofeo R (make sure it's the 650 approved 99Y load rated trofeo than the 103Y rated one used on the P1) are your best bet and always run the car in track mode suspension. There is not a lot of clearance between the rear diffusor and tyres, especially so if you have the cf diffusor and the 12c doesn't really like square shouldered rear tyres and has been known to either damage the tyre arch linings (expensive) or even the diffusor (very expensive if cf).
If you are prepared to run 10mm spacers at the rear it should definitely be fine for any 305 section trofeo/cup2, possibly even the wider 315 toyo. I will be running cup2s in oem sizes in march without spacers on my car which possibly is a risk but will see how it goes.
Thanks for your comments, I did notice that Toyo dont currently do a 305 but as you say make a 315, I was hoping that with the new 888R that may change, I did notice that the P1 appears to run my superlight alloys with a 315 section tyre,so considered that as a possiblr option. IMO the 12c badly needs some spacers for looks but didnt want to or know how that may mess up all the electronics on the car ?.
My question over on Porsche forum was more are Toyo really the same price as everything else now ?
I spoke to what appeared to be a couple of knowledgable guys at a recent RMA day who looked like they could peddle (think they were instructors)who just happend to have a 12c with them, I asked what they thought of the car and both said that they were unimpressed last time out with the car on Pirelli rubber but had just fitted MPSC2 and it had transformed the car completly, I will probably go this route unless a set of Toyo's are significantly cheaper.
TISPKJ said:
Hi Isaldiri thought would start another thread for future searches.
Thanks for your comments, I did notice that Toyo dont currently do a 305 but as you say make a 315, I was hoping that with the new 888R that may change, I did notice that the P1 appears to run my superlight alloys with a 315 section tyre,so considered that as a possiblr option. IMO the 12c badly needs some spacers for looks but didnt want to or know how that may mess up all the electronics on the car ?.
My question over on Porsche forum was more are Toyo really the same price as everything else now ?
I spoke to what appeared to be a couple of knowledgable guys at a recent RMA day who looked like they could peddle (think they were instructors)who just happend to have a 12c with them, I asked what they thought of the car and both said that they were unimpressed last time out with the car on Pirelli rubber but had just fitted MPSC2 and it had transformed the car completly, I will probably go this route unless a set of Toyo's are significantly cheaper.
The P1 runs the 305 section trofeo oddly enough as the optional factory approved despite runnng a 315 corsa as the standard tyre. I have been told (can't gtee it is true) the 305 trofeo with 103Y load rating has tread width is a good bit more than the 99Y load one. Supposedly that's why Mclaren insist on the 99Y tyre for the 650 only (12c is not manufacturer approved for the trofeos full stop if the diffusors gets damaged). The p1 wheels as well may look the same as the superlights but they aren't the same afaik, different offsets and a few other things. Don't quote me on that though! Thanks for your comments, I did notice that Toyo dont currently do a 305 but as you say make a 315, I was hoping that with the new 888R that may change, I did notice that the P1 appears to run my superlight alloys with a 315 section tyre,so considered that as a possiblr option. IMO the 12c badly needs some spacers for looks but didnt want to or know how that may mess up all the electronics on the car ?.
My question over on Porsche forum was more are Toyo really the same price as everything else now ?
I spoke to what appeared to be a couple of knowledgable guys at a recent RMA day who looked like they could peddle (think they were instructors)who just happend to have a 12c with them, I asked what they thought of the car and both said that they were unimpressed last time out with the car on Pirelli rubber but had just fitted MPSC2 and it had transformed the car completly, I will probably go this route unless a set of Toyo's are significantly cheaper.
Spacers - i don't think there's an issue if you don't go much over 10-20mm. Personally i am trying to do my best to avoid using them but that's just me. If even on track suspension if i damage the tyre liners then i will rethink that.
The Pirellis (non trofeos) are pretty poor on track I find and corsas while a bit grippier are even more pressure sensitive and a friend truly hates the corsas (tread failure after a single trackday twice). Cup2s are a great tyre but i'd only be able to tell you what i think of them on the 12c in a few months
Based on my experience I wouldn't be using the Toyo R888 on the McLaren in the dry, the compound overheats too quickly (oddly it makes a great wet track tyre) in high torque turbo'd cars and after a few laps will become very loose and make your traction system and brake steer work overtime. Any saving on cost will be lost by burning through the tyres quicker. Michelins/Pirelli track options are the only way to go IMO.
Thanks Guys, I think the Michelins may well be the way forward basis they are available in the correct size and are a proven product.
I used the Toyo R888 on my GT3 a few moons ago (as most did at the time) and never had any problems, at the time they were almost half price to the MPSC.
I was hoping the new R888R would be available in 305 to try but as I said in the porsche post it appears Toyo are now same money as all the others.
edited to add
Whats the thoughts on tyre age chaps ? as in I dont want something that has been sat on the shelf for 3 years do I ? how old is acceptable ?
I used the Toyo R888 on my GT3 a few moons ago (as most did at the time) and never had any problems, at the time they were almost half price to the MPSC.
I was hoping the new R888R would be available in 305 to try but as I said in the porsche post it appears Toyo are now same money as all the others.
edited to add
Whats the thoughts on tyre age chaps ? as in I dont want something that has been sat on the shelf for 3 years do I ? how old is acceptable ?
Edited by TISPKJ on Tuesday 5th January 13:46
I had a quote on a set of MPSC2 this afternoon, the guy said he quoted for N (Porsche fitment) as they were available both front and rear, whereas Y (Ferrari) are only available in rears.
Do things like N rating really make any odds ? I always thought it was just another of the likes of Porsche ripping you off.
Do things like N rating really make any odds ? I always thought it was just another of the likes of Porsche ripping you off.
faster than both too 
TISPKJ said:
Meaning ?
103 is greater than 99 or the reverse ?
There is a risk that the 103 loading will damage the diffuser on the 12c. This does not appear to be an issue with the 650s. However, Michelin does not produce the 305/30/20 Cup tyre in a 99 load, but many 12C owners seem to be using it without any problems. Maybe some on here can shed light on this.103 is greater than 99 or the reverse ?
The Pirelli Trofeo R, which is my far the best track tyre, does come in a 99 loading, but getting a pair is like gold dust!
The 650 has the trofeo r tyre option, the 12c doesn't. I don't personally think it makes a difference as I was told abs/esc is an active system based on what sensors are detecting and i haven't noticed a difference myself between corsa and pzero on 3 different tyres. If i had to hazard a guess I'd say it was launch control related mainly outside of possibly winter tyre mode.
99Y load rating is required only for that particular trofeo to seperate it from the 103Y trofeo that exists in the same section/profile/width. It is not a generic load requirement for any tyre to be used on the 12c or 650.
99Y load rating is required only for that particular trofeo to seperate it from the 103Y trofeo that exists in the same section/profile/width. It is not a generic load requirement for any tyre to be used on the 12c or 650.
Guys, have fitted the tyres and wheels to the car.
They are MPSC2 305-30-20 103y and 235-35-19 91y (basically Porsche NO fitment)
I can't see that they will possibly foul anything to be honest although appreciate that hard track use could expand them a little.
Have not driven yet so will report back as and when.
They are MPSC2 305-30-20 103y and 235-35-19 91y (basically Porsche NO fitment)
I can't see that they will possibly foul anything to be honest although appreciate that hard track use could expand them a little.
Have not driven yet so will report back as and when.
ChrisW. said:
I have just fitted a set to a GT4 for wet and cold track days.
Used the for the first time at Cadwell Park a week last Saturday ... the temperature was 5 degrees C and we saw better that 1.5 lateral g in the compressions.
I was surprised !!
That's a 1.5g only on spikes though I guess? Sustained g the supersports will struggle to do much more than 1.1... I tried!Used the for the first time at Cadwell Park a week last Saturday ... the temperature was 5 degrees C and we saw better that 1.5 lateral g in the compressions.
I was surprised !!
Dblue said:
Supersports are fantastic tyres. Near Cup levels of grip, much better when cold and 300 wear rating!!! Can personally vouch for the longevity after our Spain trip
BUT Michelins new Pilot Sport 4 is on the way and they are talking it right up.
Pete, the pilot sport 4 would be the ps3 replacement though surely not the supersport replacement?BUT Michelins new Pilot Sport 4 is on the way and they are talking it right up.
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