|
|
|
08-10-2014, 05:31 AM | #23 | |
Colonel
232
Rep 2,643
Posts |
Quote:
http://www.performancesimulations.co...on-tires-1.htm The idea is that tyres do not behave the same as a balloon. Modern tyres are full of steel, nylon and Kevlar so the tyre has weight and stiffness that affects the size of the contact patch. Also the contact patch will be different in dynamic conditions vs static condition due to the forces on the tire. |
|
Appreciate
0
|
08-10-2014, 07:13 AM | #25 | ||||
Captain
428
Rep 715
Posts |
Quote:
E.g. see Extreme Time Attack street class rule: ■All Street Class vehicles must use DOT street tires with a UTQG tread wear rating of 140 or higher. Driving on moist roads today in 10 degree Melbourne winter weather they felt grippier than the outgoing PS2s, despite being 15km old. Quote:
Quote:
Coming Saturday Smiley. Here's the link http://wrx.com.au/event-899288 35 places left as I write. Be great if you could make it. Quote:
iPhone photos:
__________________
M4 Times (PSC2): Sandown: 1.21.76 Winton: 1M Times (PSC2): Phillip Island: 1.53.09 Sandown: 1.24.03 Calder Park: 1.07.31 Winton: 1.36.71 |
||||
Appreciate
0
|
08-10-2014, 07:54 AM | #26 | |
Brigadier General
191
Rep 4,848
Posts |
Quote:
May be I am secretly frustrated that I am struggling to tame the 1Monster.
__________________
Macan S Diesel - Carrera White
Macan Turbo - White 1///M - Valencia Orange |
|
Appreciate
0
|
08-10-2014, 08:41 AM | #27 |
Brigadier General
457
Rep 4,822
Posts |
Must admit that caught me completely by surprise! So Michelin has moved the Cup tyres away from being a proper semi slick? Do they still have a semi slick product?
|
Appreciate
0
|
08-10-2014, 07:33 PM | #28 |
Captain
428
Rep 715
Posts |
Don't know if they are keeping the older PSC+ as a semi-slick, but from what I have read these are faster anyway!
Pete has written a great review here: http://www.1addicts.com/forums/showt...1009055&page=2 I'll add my contributions after the weekend - hopefully get into the low 1.24s.
__________________
M4 Times (PSC2): Sandown: 1.21.76 Winton: 1M Times (PSC2): Phillip Island: 1.53.09 Sandown: 1.24.03 Calder Park: 1.07.31 Winton: 1.36.71 |
Appreciate
0
|
08-10-2014, 07:45 PM | #29 | |
Brigadier General
457
Rep 4,822
Posts |
Quote:
Also keen to hear more impression of the PSC2 for road use. |
|
Appreciate
0
|
08-10-2014, 07:50 PM | #30 | |
Captain
428
Rep 715
Posts |
Quote:
Of course one can go quicker....but can I go quicker?
__________________
M4 Times (PSC2): Sandown: 1.21.76 Winton: 1M Times (PSC2): Phillip Island: 1.53.09 Sandown: 1.24.03 Calder Park: 1.07.31 Winton: 1.36.71 |
|
Appreciate
0
|
08-10-2014, 08:05 PM | #31 | |
Brigadier General
457
Rep 4,822
Posts |
Quote:
I can't see your signature on my phone and had to look at the full version. Nice times with standard tyres. If the PSC2 is as good as everyone says then 1.5s reduction is certainly possible! Good luck and let us know. |
|
Appreciate
0
|
08-10-2014, 08:23 PM | #32 | |
Captain
428
Rep 715
Posts |
Quote:
I'll give some street and track feedback next week.
__________________
M4 Times (PSC2): Sandown: 1.21.76 Winton: 1M Times (PSC2): Phillip Island: 1.53.09 Sandown: 1.24.03 Calder Park: 1.07.31 Winton: 1.36.71 Last edited by MPoweRo; 08-10-2014 at 08:23 PM.. Reason: spelling |
|
Appreciate
0
|
08-10-2014, 11:44 PM | #33 | |
Colonel
650
Rep 2,601
Posts
Drives: G81 M3 Touring, GR Supra GTS
Join Date: Jan 2012
Location: Perth
|
Quote:
|
|
Appreciate
0
|
08-11-2014, 12:35 AM | #34 |
Brigadier General
457
Rep 4,822
Posts |
Yeah I had a 996.2 GT3 with PCCBs. They are less friendly to drive at the limit than 997.2. More raw in many ways. But the enlarged 3.8 engine in the 7.2 provides much more torque and the 7.2 is a much faster car. There are no electronic aids at all in the 996 and couple that with the fact that it is a car that can bite, you better be a good driver. The brakes on the 7.2 is much more powerful even without PCCBs. I had one 7.2 with PCCB and another without. The PCCBs in the 7.2's are even better but you wouldn't want them for track. Well, unless you can afford the replacement cost of the rotors.
|
Appreciate
0
|
08-11-2014, 03:55 AM | #35 | |
Brigadier General
1281
Rep 4,092
Posts |
Quote:
|
|
Appreciate
0
|
08-18-2014, 05:22 AM | #36 |
Captain
428
Rep 715
Posts |
Feedback after Sandown.
Quite happy with them. Since the last Sandown event I have also fitted Bilstein Clubsport coilovers so it's difficult to know exactly which character/response is due to which modification. Also keep in mind that it was a cold day with lower track temperatures than my previous PB. Pros. Stability: Very predictable if you've over stepped the mark with corner entry speed and trailed too much brake - the car just stood firm, didn't get out of shape and just allowed little modifications to bring it back into line. Through the high speed kink over the back they felt quite stable, but I was wandering around under brakes (front toe is neutral - perhaps toeing out under brakes). NVH: Driving home they and re-inflated to street pressures they feel a lot like the PS2s, and quiet on smooth freeways (although they rumble on more coarse chip). Warm up: after less than half a lap (weaving a little and braking aggressively to de-glaze pads and get heat into tyres) these were ready to go so the 1st full lap would always count. Cons. Pressure sensitive: these tyres really like lower pressures. Despite attacking harder and taking the car closer to the limit during each session my times were dropping after lap 2 or 3, which is unusual for me (usually quickest lap is 4 or 5). I was starting at 32 cold then running 34 hot initially. Next time I'll aim for 32 hot - semi-slick sort of pressures. I was consistently lapping in the 1.25s with a best of 1.24.71, which is only 1.1 seconds better than my previous best time. I think with a warmer track and better pressure management (so tyres are reaching optimal pressure by lap 3 or 4) and perhaps some fine tuning of the suspension set up a high 1.23 is there. Ah well, next time. In summary, a high performing tyre that suits our short wheelbase cars well and which performs the dual duty of street and track.
__________________
M4 Times (PSC2): Sandown: 1.21.76 Winton: 1M Times (PSC2): Phillip Island: 1.53.09 Sandown: 1.24.03 Calder Park: 1.07.31 Winton: 1.36.71 |
Appreciate
0
|
08-18-2014, 03:48 PM | #37 | |
Captain
376
Rep 668
Posts |
Quote:
My experience with GT3 s at the track is that it is rare to see one driven to the cars potential. |
|
Appreciate
0
|
08-22-2014, 02:33 AM | #38 |
Captain
376
Rep 668
Posts |
|
Appreciate
0
|
08-22-2014, 04:16 AM | #39 | |
Brigadier General
331
Rep 4,021
Posts
Drives: F32 Coupé
Join Date: Mar 2011
Location: Brisbane, Australia BMW Club QLD Member
|
Quote:
|
|
Appreciate
0
|
08-22-2014, 04:39 AM | #40 |
Captain
59
Rep 741
Posts
Drives: E87 130i
Join Date: Jan 2012
Location: Melbourne, AU
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|