Cayman R - owners/buyers/mods

Cayman R - owners/buyers/mods

Author
Discussion

PR36

341 posts

115 months

Friday 17th April 2015
quotequote all
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

edc

9,231 posts

250 months

Friday 17th April 2015
quotequote all
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.


PorscheGT4

21,146 posts

264 months

Friday 17th April 2015
quotequote all
edc said:
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 have no idea what you are talking about !

Beedub

1,954 posts

225 months

Friday 17th April 2015
quotequote all
dont suppose anyone has the torsional rigidity figures for the R and Spyder do they??

MDT48

389 posts

193 months

Friday 17th April 2015
quotequote all
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.

Beanoir

1,327 posts

194 months

Friday 17th April 2015
quotequote all
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.

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.
Aside from what was said in the above post which is actually a very sensible piece of information about the difference between manufacturers warranty and extended warranty, I would love for somebody to confirm that they have had a warranty claim actually rejected by Porsche because of having non-approved tyres fitted on their car, I for one have never read anything of the sort on any car or Porsche related forum ever.

J-P

4,350 posts

205 months

Friday 17th April 2015
quotequote all
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.

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.
+1

J-P

4,350 posts

205 months

Friday 17th April 2015
quotequote all
PorscheGT4 said:
so one thing we do agree on is "We're not all the same " :-) but you ARE the same as my GF she want to be in the gear the dash says on her JCW's
rofl

Sarnie

8,025 posts

208 months

Friday 17th April 2015
quotequote all
http://www.etyres.co.uk/tyre-detail/michelin-pilot...

Are these right for an R front tyre or not??

J-P

4,350 posts

205 months

Friday 17th April 2015
quotequote all
Sarnie said:
http://www.etyres.co.uk/tyre-detail/michelin-pilot...

Are these right for an R front tyre or not??
Yes, they're the right tyre size.

Sarnie

8,025 posts

208 months

Friday 17th April 2015
quotequote all
J-P said:
Sarnie said:
http://www.etyres.co.uk/tyre-detail/michelin-pilot...

Are these right for an R front tyre or not??
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??

J-P

4,350 posts

205 months

Friday 17th April 2015
quotequote all
Sarnie said:
J-P said:
Sarnie said:
http://www.etyres.co.uk/tyre-detail/michelin-pilot...

Are these right for an R front tyre or not??
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??
Here's the page from Michelin:

http://www.michelin.co.uk/tyres/car-tyres#type=typ...

Sarnie

8,025 posts

208 months

Friday 17th April 2015
quotequote all
J-P said:
Sarnie said:
J-P said:
Sarnie said:
http://www.etyres.co.uk/tyre-detail/michelin-pilot...

Are these right for an R front tyre or not??
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??
Here's the page from Michelin:

http://www.michelin.co.uk/tyres/car-tyres#type=typ...
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??

EricE

1,945 posts

128 months

Friday 17th April 2015
quotequote all
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.

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).

Beanoir

1,327 posts

194 months

Friday 17th April 2015
quotequote all
Sarnie said:
J-P said:
Sarnie said:
http://www.etyres.co.uk/tyre-detail/michelin-pilot...

Are these right for an R front tyre or not??
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??
No they should be the same all round. Mixing is not a great idea, although granted you'd be better with directional tyres up front rather than the other way around. Cars can do strange things when you mix the 2

J-P

4,350 posts

205 months

Saturday 18th April 2015
quotequote all
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.

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).
I would do this but Sarnie wants to keep his warranty. I believe you can get MPSC2 in N spec though!

PorscheGT4

21,146 posts

264 months

Saturday 18th April 2015
quotequote all
J-P said:
I would do this but Sarnie wants to keep his warranty. I believe you can get MPSC2 in N spec though!
he will still not have 4 matching tyres though, each to their own and all that.

Beanoir

1,327 posts

194 months

Saturday 18th April 2015
quotequote all
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.

Fingers crossed though!

EricE

1,945 posts

128 months

Saturday 18th April 2015
quotequote all
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.

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.

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...




fioran0

2,410 posts

171 months

Sunday 19th April 2015
quotequote all
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.
You missed what I was getting at.
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...