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Helpful ReplyHot!981 Cayman S Geometry & Michelin PS4S N0 tyres

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Ray
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/08 19:45:04 (permalink)

West Yorkshire
Andrew_CS
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/08 23:45:19 (permalink)
In general, yes ... thank you.
 
In detail, not really as this appears to be a `perfect world - conditions` test and not representative enough of the cars - roads - conditions we here drive on.
 
My PS4S`s are now at 10k and 5-6mm, I find them excellent in all conditions and would not change for another brand. Part being that I want to maintain N rating compliance (even though this tyre was not on the original Porsche fitment list for the car). 

Andrew
981 Cayman S PDK
Aberdeenshire (R2)

Previously
Cayman R Manual


Motorhead
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/09 14:05:58 (permalink)
Thanks Ray.
 
I think that tests of this type are very useful and relevant precisely because the tyres are tested under controlled and identical conditions; but as always the results inevitably are somewhat vehicle dependant, in this case a front-engined rear wheel drive car. How well they translate to our mid-engined cars with more rear weight bias and lower polar moment of inertia is open to question, particularly for dry road and wet road handling.
 
Jeff
 

987.2 Cayman S
North Beds (R10 & R24)
BJ Innes
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/09 15:29:30 (permalink)
I agree with Jeff.
 
Although tyre comparison tests are useful for learning about the general grip characteristics of the tyre, the behaviour of the tyre carcass under cornering load conditions is very different between front-engined rear wheel drive cars and mid-engined cars. Completely different dynamics are at play here.
 
Brian  

Nairnshire,
Highlands
Previous:
2007 Cayman 987.1 2.7 Manual.
2010 Cayman S 987.2 Manual
2012 Cayman R Manual
2019 718 Cayman S PDK
Current:
2015 Abarth 595 Competizione 180bhp Manual
718 Cayman GTS PDK

Ray
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/09 15:43:36 (permalink)
BJ Innes
I agree with Jeff.
 
Although tyre comparison tests are useful for learning about the general grip characteristics of the tyre, the behaviour of the tyre carcass under cornering load conditions is very different between front-engined rear wheel drive cars and mid-engined cars. Completely different dynamics are at play here.
 
Brian  


I agree that differing outcomes can result from vehicle to vehicle. But, unless an individual takes a punt at a different set of tyres which have not been tested by Porsche then people could be limited only to the tyres tested by Porsche?
 
Ray

West Yorkshire
Krispe
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/09 16:07:23 (permalink) ☄ Helpfulby Andrew_CS 2019/07/09 19:18:18
I have the following alignment on my 981 CGTS with MPS4S. Felt amazing on my road trip to the Alps last week, loads of grip, balance and confidence, car feels very neutral. I run my tyres at 33psi hot as I find this gives best grip.  I also had fitted X73 rollbars (my car has PASM) and 718 rear brace at the same time as the new alignment. 
 

 
 
BJ Innes
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/09 19:44:37 (permalink)
Those settings look pretty much spot-on to me.
 
Brian 

Nairnshire,
Highlands
Previous:
2007 Cayman 987.1 2.7 Manual.
2010 Cayman S 987.2 Manual
2012 Cayman R Manual
2019 718 Cayman S PDK
Current:
2015 Abarth 595 Competizione 180bhp Manual
718 Cayman GTS PDK

Ray
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/25 12:05:18 (permalink)
https://www.youtube.com/watch?v=VpZss_Y_JHc&feature=em-uploademail
 
Hi Guys, Don't know if you have seen the latest tyre review from "Tyre Reviews"?
 
Ray

West Yorkshire
Andrew_CS
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/25 23:42:20 (permalink)
Thanks Ray,
 
Good to see the `competition` progressing; interesting car on Goodyear`s webpage  
 
Supersport range ... https://www.goodyear.eu/en_gb/consumer/why-goodyear/uuhp.html
 
N  rated ... 
 
EAGLE F1 SUPERSPORT RS265352099YXL | N0EAGLE F1 SUPERSPORT RS3253021108YXL | N0 
post edited by Andrew_CS - 2019/07/25 23:53:08

Andrew
981 Cayman S PDK
Aberdeenshire (R2)

Previously
Cayman R Manual


andrewjb
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/07/30 19:12:26 (permalink)
Just has M PS 4S fitted and alignment done today! car feels lcompletely different! alighnment settings previous were really out!
Rocket_Rabbit
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Re: 981 Cayman S Geometry & Michelin PS4S N0 tyres 2019/08/13 23:46:17 (permalink)
I have done geo on plenty of cars over the years and, unless you've clobbered something, they don't really move.

So either vibrations are moving the adjustment bolts or the metalastics are degrading at a rapid pace!  Or you've whacked something without realising.

Not ideal...
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