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My new 982 718 Cayman S PDK

BJ Innes said:
penguinman said:
Brian, Concurs with my findings at Brands GP circuit again earlier this month. Initially started at 29psi cold (20 inch wheels), bled a lot off after first run, and later I did try reducing pressures yet again to 32 hot after advice from Cayman racer which gave a marginal improvement. An excellent road tyre and in wet, but comes up short on track in the dry.

It's good to hear I'm not the only one to discover this. As you say, the PS4S comes up short on expectations on a hot, dry track.

Brian

Tricky I guess as that why the PS4S is SO good on the road and in the wet, you get heat into it on the road.

when I did Spa my tyres were >65oc it was just too hot and that was with track tyres, I got 1.5 laps and they went off !!

any track works needs cup2's and they still don't like this sort of weather we are having atm for 10 track laps they still go off !

I am super pleased with my PS4S on both my cars, running them though winter has been amazing.

my other 2 cars have cup 2's on them, you just have to pick the right tyres for the job, or do less laps on track if you track with road tyres !

3 hot laps is ok imo for a road tyres, I use to get 1 hot lap with the P zero 's !!!! so much so I only did one track day with those and went home at midday.

 
Gosh..! Standard road cars exceeding track noise limits; road tyres falling short of expectations on track; gearboxes falling apart under the rigours of track work.

I hate to say it but are our cars just getting too damned FAST..?? [;)]

Jeff

 
Motorhead said:
Gosh..! Standard road cars exceeding track noise limits; road tyres falling short of expectations on track; gearboxes falling apart under the rigours of track work.

I hate to say it but are our cars just getting too damned FAST[/i]..?? [;)]

Jeff

I hate to say it but go on track use a track tyre ;-)

 
Maybe this discussion should be in the Club Trackdays section of the forum but track tyres will not work for most PCGB track day members who will do two or three days with the Club at most. At Goodwood you are in 20 minutes sessions and overheating tyres after a couple of laps is rather a waste.

Mike Wilds was lapping in 20 minute sessions at Goodwood in maybe 1:27's in a Turbo S with passenger on OEM tyres. Nothing was smoking when he came into the pits. When I met him later he said he wasn't really pushing, just trying to be smooth.

If you are seriously into track days doing more than a handful of days each year then investing in Cup2 or Trofeo tyres can be worthwhile but otherwise it is driving within the limits of the machinery and driver skills.

BTW, experience of Cup2s in Portugal and Spain last September in ambient of >85F, they held on well for me and others who were driving GT3/RS/GT4s. At some point they will succumb but isn't the art in going quickly and managing the car in all conditions?

 
ralphmusic said:
but isn't the art in going quickly and managing the car in all conditions?

not really, if the tyre over heats in one lap and you have to go 8 seconds off the pace why bother spending the £1.5k a track day costs (if you take into account everything) going quickly = having the right equiment under you in the 1st place.

far cheaper to have a 2nd set of wheels with cup 2's on them as they are a great summer tyres esp this summer, over binning off a track day and going home pissed off. Hence I have 2 cars on Cup2's and 2 on PS4S. I buy cars over wheels !!! but if I had one car I would have 2 sets wheels if I liked track days.

 
Thanks Brian,

I have ordered PS4S mainly because I am fed up with changing them every 6/7000 miles.

I look forward to usin them on the LE Mans track next week and almost hope it rains!

Thanks for your illuminating report.

 
Hi Brian, good to meet up with you again today at Donington. As promised, here's your video from Knockhill now on my YouTube channel for you and all to see. Just click the link below to see it:

[link]https://www.youtube.com/watch?v=2dMTgyRiI-o[/url]

 
MrDemon said:
search party needed for Brian !!!

Don't worry, I heard from him today and have seen that photo of us at Donny! I think he's a bit bushed from the round trip and will be back to report here when the old batteries are re-charged! [:D]

 
Steve Brookes said:
MrDemon said:
search party needed for Brian !!!

Don't worry, I heard from him today and have seen that photo of us at Donny! I think he's a bit bushed from the round trip and will be back to report here when the old batteries are re-charged! [:D]
Sounding like a constant trickle charger may be the order of the day. Having said that this heatwave is knocking me out. Lethargy is my answer to she who must be obeyed, she says laziness. Cannot argue as there would be only one winner.

Ray

 
Thanks guys. Great to meet you all at Donington.

I'm back home now. 1430 miles up. Trickle charger plugged in, as at 70+ I need a rest.

Report will follow soon.

Brian

 
Brian ,

you are some man for only one man .....how about a catch up for a run and a coffee or two when I’m home in August?

Back on 23rd ...

Terry

 
Dates in August are filling up Terry. I'm at Knockhill for the BTCC and Carrera Cup rounds on August 25th, 26th. Maybe meet up in Inverness after that.

PM me for details.

Brian

 
Great video Brian, thanks ... :)

Regarding tyres ... after lunch at Donny I went out with four tyres at close to 25psi and by lap 10 the outer pair were up to 32 psi ... if I had stayed out longer they would have gone "over" ... but a 15 minute session pressing on and with track temperature of 45C, both I and the car made use of a cool down ...

I still did over 140 miles at the track and didn't overcook anything ... there was also time for passenger changes and essential banter ! :)

 
Thanks again for the passenger laps at Knockhill Brian, your 718 is pretty nippy around there.

As I mentioned I headed off to Spa and Zandvoort after Knockhill, Zandvoort is my new favourite track over Zolder in the GT4, not sure if you've done it but we'll worth it IMO.

 
Thanks all for your supportive comments. Really good to meet up with all of you face to face at Knockhill, Silverstone Classic, and Donington track days. I had a great time chatting with you and sharing our views on the cars and sport we all love. It was good to put the faces and personalities behind your forum posts into a personal perspective.

Now that I've had time to catch my breath following an 8 day epic car tour from Inverness in the Highlands, to Watford Herts, I thought it may be of interest to share with you my observations and comments on this 1430 mile odyssey south to motorway-land, including the two Porsche Club events I attended at Silverstone and Donington.

So as not to bore you with too long a narrative, I shall split the report into two parts, dealing firstly with the Watford, Silverstone Classic element, followed in a separate post with the Donington track day event.

My drive south from Berwick upon Tweed via the A1/M1 was generally uneventful until I reached the proximity of the M25, which thankfully I avoided by taking the later J5 turn-off to Watford. The closer I got to London the more erratic the driving standards became. Cars, vans, and trucks thought nothing of zig-zagging across all four lanes, undertaking and overtaking at will. Vehicles also drove far too close together. Variable speed limits of 60, 50, and even 40mph were frequently announced on the overhead gantries which made the congestion and close proximity of the traffic even worse. Everyone seemed to be in such a damned hurry. "Me first" was the normal reaction of road users in the south. I was also astonished at the rip-off prices of Shell V-Power on the M1. I prefer to use this brand of fuel in my Porsche, and I try to time my refuelling stops whenever Shell petrol stations appear on the service signposts. In Scotland, V-Power currently costs £1.34 per litre. I was paying £1.60 per litre on the M1 at Newport Pagnell. Blatant profiteering.

My day at the Silverstone Classic was absolutely astounding. The warm, sunny weather made for very pleasant browsing amongst the astonishing collection of road and race cars on display in the various club car parks and pit-lane garages and paddocks. In all my many years of attending race meetings and classic car shows up and down the country, I have never before seen such a high quality and diverse selection of road and race cars in my life. Close quarter access to all of the cars was freely available, even in the pit-lane garages where the mechanics were busy fettling the cars prior to their race. Some were even dismantling race engines in the garages to rectify mechanical faults, and were in no way brusque or off-hand when polite enquiries were made as to the problem. I watched several races from the Porsche Club grandstand which was adjacent to the club marquee where unlimited coffees, and teas were dispensed. Oh the joy of hearing the wonderful shrill wail of the V12 F1 Ferrari and Leiger F1 cars from the 1980's. These sounds contrasted with the more familiar gruff blare of the Cosworth DFV V8's and the Renault turbo F1 cars. It was heaven on wheels. The Silverstone Classic is an event I shall never forget for its atmosphere, friendliness, and sheer spectacle. I hope to return again.

My Donington track day report follows soon.

Brian







 
Photo: Minimising wear of the offside front on a roasting hot day [;)]

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