Cayman R - owners/buyers/mods
Discussion
I personally would run the manufacturer recommended for road use and especially if you are setting them cold. I think the problem using cold temps is that there can be such a variation in the actual pressure once 'warmed up' considering driving in the winter vs the height of summer and everything inbetween, also adding in whether you are cruising about or pushing on etc etc. In terms of hot pressures especially for track work there is a lot of good threads on planet 9 from serious guys tracking there cars and from memory I think they aim for about 38F and 40R (ish) hot but I would check there for sure.
Edited by PR36 on Friday 17th April 15:54
PorscheGT4 said:
why ? it has nothing to do with ride height !
I fitted rear toe links to mono ball to stop the rear bush's compressing and changing the direction of the rear wheel under hard braking.
I found the rear of the car squirm as standard and now it's brakes very direct and straight.
The driver for me to do that mod was to maintain decent geo and balance to the front. Low and standard rear arms rather than adjustable ones means crap rear geo. Yes the arms have less rubber bushing than the standard ones. I fitted rear toe links to mono ball to stop the rear bush's compressing and changing the direction of the rear wheel under hard braking.
I found the rear of the car squirm as standard and now it's brakes very direct and straight.
Beanoir said:
The Porsche warranty is only a problem if the unaproved tyres were the casue of the issue you were claiming under the warranty for, which is unlikely to be the case. I've never had a problem in the past with it.
Actually that's not accurate at all. That's true of a manufacturer warranty, but not an extended warranty. With a manufacturer warranty (which is only two years from Porsche) they can only refuse a claim due to modification if said modification was the direct cause of the failure and consequent claim.
The Porsche extended warranty is essentially an insurance policy, which is is not subject to the block exemption rules that apply to manufacturer warranties.
Given the age of the Cayman R, we're talking extended warranty here, since I assume everyone's two-year manufacturer warranty has expired.
Oh, and anyone who's thinking that they got a three-year warranty with their Porsche, bear in mind that the manufacturer warranty was still only two years, but Porsche adds on a third year as an extended warranty on all new sales these days.
bcr5784 said:
Sarnie said:
Everybody wants to run PSS'. I do. I have them on my M3 and all previous cars.
However, if I have a warranty, there's no point needlessly potentially voiding it is there? No point giving Porsche an easy excuse to not pay out for something that they should do, just because I put non N-spec tyres on....
Have to agree - you could foresee that if you had any sort of handling/steering/suspension issue they could say (at least) that they weren't going to look at it until it had the recommended tyres.However, if I have a warranty, there's no point needlessly potentially voiding it is there? No point giving Porsche an easy excuse to not pay out for something that they should do, just because I put non N-spec tyres on....
Incidentally, as someone posted elsewhere, if you feel you need to replace both fronts because of there would be too much difference in tread depth between the new and old (but still good) tyre, it might be as well to keep the good tyre. Then if you have a puncture on the other side you will have a "spare". How likely that is on the front, I'm not sure - I once read that 80% of punctures occur on rear tyres.
bcr5784 said:
Sarnie said:
Everybody wants to run PSS'. I do. I have them on my M3 and all previous cars.
However, if I have a warranty, there's no point needlessly potentially voiding it is there? No point giving Porsche an easy excuse to not pay out for something that they should do, just because I put non N-spec tyres on....
Have to agree - you could foresee that if you had any sort of handling/steering/suspension issue they could say (at least) that they weren't going to look at it until it had the recommended tyres.However, if I have a warranty, there's no point needlessly potentially voiding it is there? No point giving Porsche an easy excuse to not pay out for something that they should do, just because I put non N-spec tyres on....
Incidentally, as someone posted elsewhere, if you feel you need to replace both fronts because of there would be too much difference in tread depth between the new and old (but still good) tyre, it might be as well to keep the good tyre. Then if you have a puncture on the other side you will have a "spare". How likely that is on the front, I'm not sure - I once read that 80% of punctures occur on rear tyres.
Sarnie said:
Yes, they're the right tyre size.J-P said:
Sarnie said:
Yes, they're the right tyre size.Cheers but one of the sites says;
"The Pilot Sport PS2 235/35 ZR19 87Y (FSL, N2) is the updated version of the asymetric PILOT tyre"
Aren't front tyres supposed to be directional's and rears asymetrics??
Sarnie said:
J-P said:
Sarnie said:
Yes, they're the right tyre size.Cheers but one of the sites says;
"The Pilot Sport PS2 235/35 ZR19 87Y (FSL, N2) is the updated version of the asymetric PILOT tyre"
Aren't front tyres supposed to be directional's and rears asymetrics??
http://www.michelin.co.uk/tyres/car-tyres#type=typ...
J-P said:
Sarnie said:
J-P said:
Sarnie said:
Yes, they're the right tyre size.Cheers but one of the sites says;
"The Pilot Sport PS2 235/35 ZR19 87Y (FSL, N2) is the updated version of the asymetric PILOT tyre"
Aren't front tyres supposed to be directional's and rears asymetrics??
http://www.michelin.co.uk/tyres/car-tyres#type=typ...
I thought Michelin didn't do an N-spec front and rear set for the R, but that link seems to say that they do??
Sarnie said:
Thanks!
I thought Michelin didn't do an N-spec front and rear set for the R, but that link seems to say that they do??
They do but its the relatively old and outdated Pilot Sport 2 instead of the newer Pilot Super Sport which is better in almost every aspect. I thought Michelin didn't do an N-spec front and rear set for the R, but that link seems to say that they do??
A Michelin spokesperson said that there will be a new N-spec tyre out in September 2015 but wouldn't say if its a PS3, PSS or something new entirely. It might be worth the wait if you have warranty on the car and plan to extend it. If you don't care about warranty and don't plan to sell the car soon then just get a set of non N-spec PSS (for a daily driver) or MPSC2 (for trackday/weekend/nice weather car).
Sarnie said:
J-P said:
Sarnie said:
Yes, they're the right tyre size.Cheers but one of the sites says;
"The Pilot Sport PS2 235/35 ZR19 87Y (FSL, N2) is the updated version of the asymetric PILOT tyre"
Aren't front tyres supposed to be directional's and rears asymetrics??
EricE said:
Sarnie said:
Thanks!
I thought Michelin didn't do an N-spec front and rear set for the R, but that link seems to say that they do??
They do but its the relatively old and outdated Pilot Sport 2 instead of the newer Pilot Super Sport which is better in almost every aspect. I thought Michelin didn't do an N-spec front and rear set for the R, but that link seems to say that they do??
A Michelin spokesperson said that there will be a new N-spec tyre out in September 2015 but wouldn't say if its a PS3, PSS or something new entirely. It might be worth the wait if you have warranty on the car and plan to extend it. If you don't care about warranty and don't plan to sell the car soon then just get a set of non N-spec PSS (for a daily driver) or MPSC2 (for trackday/weekend/nice weather car).
EricE said:
They do but its the relatively old and outdated Pilot Sport 2 instead of the newer Pilot Super Sport which is better in almost every aspect.
A Michelin spokesperson said that there will be a new N-spec tyre out in September 2015 but wouldn't say if its a PS3, PSS or something new entirely. It might be worth the wait if you have warranty on the car and plan to extend it. If you don't care about warranty and don't plan to sell the car soon then just get a set of non N-spec PSS (for a daily driver) or MPSC2 (for trackday/weekend/nice weather car).
Trouble is will it be in sizes for the Cayman R, this be the trouble with the PSS it was launched as an N-spec tyre and covered all the newer models but only half worked for discontinued cars. A Michelin spokesperson said that there will be a new N-spec tyre out in September 2015 but wouldn't say if its a PS3, PSS or something new entirely. It might be worth the wait if you have warranty on the car and plan to extend it. If you don't care about warranty and don't plan to sell the car soon then just get a set of non N-spec PSS (for a daily driver) or MPSC2 (for trackday/weekend/nice weather car).
Fingers crossed though!
Beanoir said:
Trouble is will it be in sizes for the Cayman R, this be the trouble with the PSS it was launched as an N-spec tyre and covered all the newer models but only half worked for discontinued cars.
Fingers crossed though!
From what I understand the Pilot Sport 2s are already discontinued but Michelin continues to make them in N-spec because they are contractually obligated to offer approved tyres for x years from the launch of the car.Fingers crossed though!
The PSS was supposed to replace the PS2 but Porsche wouldn't approve them on older cars for reasons unknown.
jamiemcwhir said:
The real problem that faces owners falls into two areas:
1) warranty, and the lack of choice and availability
(Yes I agree, and again I am not trying to pass the buck, but the lack of approval for PSS has hit us quite hard, leaving a "hole" in the range and limiting choice for owners. So I am in total agreement)
This is Michelin saying that the lack of approval for the PSS hit them quite hard! Why would Porsche not approve the PSS on older cars? Certainly not because it's a worse and underperforming tyre compared to the PS2.1) warranty, and the lack of choice and availability
(Yes I agree, and again I am not trying to pass the buck, but the lack of approval for PSS has hit us quite hard, leaving a "hole" in the range and limiting choice for owners. So I am in total agreement)
I imagine it is more expensive for Michelin to keep making the PS2s with outdated compound and old moulds than a tyre with their current technology, so they have interest in replacing the old N-spec PS2 with a newer model.
A N-spec PSS would be the best case scenario but I am afraid it will be a worse, more "streetable" tyre to keep a safe distance in handling and lap times between the older and newer cars. We shall find out in September.
It's all in this thread - jamiemcwhir is a Michelin official. It's a shame he stopped posting, I tried to get a hold of him but couldn't find an email-address or twitter account.
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
PorscheGT4 said:
fioran0 said:
The chalk is likely telling you more about the tire pressure at that time than anything I suspect. I would be wary of using it to provide much insight about alignment other than showing you have it set horrendously off.
I set pressures by temps across the tyre, on the track with only -1 camber you cannot go by temps as you are just over heating the outters.So 1st you have to fix camber to then allow you to look at pressures imo.
My pressure are about spot on with the R and even wear across the tyre for road use as you are not really over heating tyres on the road.
for a very close to stock my R is amazing with min money spent on it.
I will take any advice on how to set track tyre pressure though as I find this a battle on my Spyder, but again I am hoping with my new setup I might be able to now dial in the pressures better.
All I was saying was that the ability to take chalk off the tire like that is pretty much just related to how the pressures in the tires are set (i.e. not over inflated etc), assuming ones geo isn't completely horrendous.
Just because all the chalk comes off doesn't mean that the width of the tire is being worked in an optimal fashion and things can be considered great. It may well be that they are, but it also need not be.
Here's a link that you might find useful regarding your question
http://www.elephantracing.com/techtopic/tiretemp.h...
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