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I took my 800 kms RS to the track Monday night (Sydney Motorsport Park). Kept to 5000rpm for first 500kms and then 7000rpm till 800kms. Opened it up fully for the track and +100kms during the evening. Before I went out, I moved the shock tops to full inboard to increase camber to max without shiming etc. (factory position is midway). Set the tires (Cup2s) to 30psi hot after first run. The car was fast out of the box and great power out of mid-speed turns. The gearing is spot on and works well on full auto. Brakes are same as any GT4 and initial bite a bit lacking (pads). Straight line speed was enough to stay with 991.2 GT3RS's (lots of well driven ones there on the night) and at 240kph on the main straight was about 10kms up on my old 718 GT4 PDK and 981 GT4 (4.25L). GT2RSs and 720Ss naturally walked away from me. I've not used Cup 2s for some time and they are not the best R-Spec tyre so lots of time to get with better tyres (I'll probably try AO52s next). Overall findings are the car is still quite soft IMO, front tyres did not roll and wore evenly across the tyre, Rears rolled onto the outside edges and need quite a bit more camber plus roll bars set to hard (I'd set the front one to hard as well). The front probably only needs one shim (plus the tops set inboard) and will be great; the car is not an understeerer but the rear is loose. Tyres plus rear camber will result in a fine package.
We ran a faux "race" at the end of the night. It started lightly raining a couple of laps in and we came second after starting 13 from 15. A lot of guys on CupRs plus a couple on slicks so Cup2 helped me, nonetheless the car is good and predicable in the wet. The car now has just over 1000kms and oil is down to one bar so probably about 0.8 to 1.0L for 1000kms which sounds about correct for a new motor.
If anyone knows SMP the car ran a 1:42.8 which is quite good and lots of room to get to at least the 39s I'd say with good tyres and simple alignment tweaks.
IMO AO52s lie between Cup2s and Cup2Rs. They are also a great road tyre (reasonably quiet) and I think they're good in the wet too so a bit of a move on from the Cup2s; time for Michelin to lift their game I think. I run them on my road wheels for my 981 GT4.
IMO AO52s lie between Cup2s and Cup2Rs. They are also a great road tyre (reasonably quiet) and I think they're good in the wet too so a bit of a move on from the Cup2s; time for Michelin to lift their game I think. I run them on my road wheels for my 981 GT4.
Are Cup-R 295 for the 4rs end of life? I can’t find any in Australia or on Michelin website.
IMO AO52s lie between Cup2s and Cup2Rs. They are also a great road tyre (reasonably quiet) and I think they're good in the wet too so a bit of a move on from the Cup2s; time for Michelin to lift their game I think. I run them on my road wheels for my 981 GT4.
The Cup 2's way past their prime IMO. They have a following for sure though.
I moved to Goodyear SC3 tires and even in those I can carry more corner speed than the Cup 2's. The A052's are quicker still over the SC3's, Michelin's suck for sidewalls too, they are just too soft.
Yes but it's also not the exact same engine. It was modified for the GT4.
Porsche wet sump motors always say "Integrated Dry Sump". A real dry sump is not integrated into an oil pan. This is why the real Dry Sump motors say something like "Dry Sump with separate oil tank". They've been pulling this stunt with misleading language since the first Boxster and 996 models in the 1990's. When the 996 Turbo came in 2001 with a real Dry Sump engine, it made for quite the confusion and consternation that continues over 20 years later. Here's the info for the real Dry Sump in the GT4 RS:
Are Cup-R 295 for the 4rs end of life? I can’t find any in Australia or on Michelin website.
I have not tried Cup 2Rs personally. Just going by lap times from others. 305R and 255F in 20s will fit. But Hoosiers are better still. I have run Hoosier 19*265s on 8.5" front rims on my 981 and they worked well. I have recently bought 20" rims (11s and 9s) for that car though so will run those in future.
Plus you want to hug the curb on #10 just a titch longer than you would think, staying left a half car length, which sets up the run thru #11 and points the car perfectly for the exit.
I increased my speed through there averaged low 90s in and out, but i think i can work it up closer to 100mph. Certainly, the clubsports with slicks can do it.
The thing I have to remind myself about the GT4RS is that exit speeds, although important, are not as critically important as they were on the lower horsepower Caymans. I used to be totally focused on setting the car up for early throttle application and fast exit. With the GT4RS, you are going to be fast out so long as the car is pointed generally in the correct direction for exit. I have to build on skills and confidence to be fast in.
When I asked pro coach David Murray what is better; fast in and slower out or slow in and faster out, he of course answered "fast in, fast out" is best. The GT4RS is capable of doing both for sure.
I have not tried Cup 2Rs personally. Just going by lap times from others. 305R and 255F in 20s will fit. But Hoosiers are better still. I have run Hoosier 19*265s on 8.5" front rims on my 981 and they worked well. I have recently bought 20" rims (11s and 9s) for that car though so will run those in future.
Barbers is a special place, and the track is so technically challenging to run quickly. At most tracks you are rewarded for late braking, early throttle application, and carrying more speed into the corners. At Barbers, you are rewarded mostly for being incredibly accurate car positioning. Such as going through the first S (Turns 10 & 11). If you put 6" of wheel on the left curb, and 4" on the right curb, you will be must faster than if you miss it by even an inch. Its a pretty easy track to learn, but takes a long time to figure out all the little inches that matter.
Plus you want to hug the curb on #10 just a titch longer than you would think, staying left a half car length, which sets up the run thru #11 and points the car perfectly for the exit.
I’ve done about 15 track days at Barber but only with the Porsche School. They keep us off all of the curbs. Turns 10 & 11 are extra challenging as is T13 if you can use the curbs.
Porsche wet sump motors always say "Integrated Dry Sump". A real dry sump is not integrated into an oil pan. This is why the real Dry Sump motors say something like "Dry Sump with separate oil tank". They've been pulling this stunt with misleading language since the first Boxster and 996 models in the 1990's. When the 996 Turbo came in 2001 with a real Dry Sump engine, it made for quite the confusion and consternation that continues over 20 years later. Here's the info for the real Dry Sump in the GT4 RS:
Wonder what metal and what treatment the cylinders have gotten on the GT4RS? Miss my 964 Turbo with nuclear proof engine.
I look forward to running my GT4 RS there next fall. I have driven most of my cars there over the year (991.1RS, 718 GT4, 991.2 RS, 992 GT3 and last month my 718 Spyder!). I look forward to seeing how well it performs. The 992 GT3 is by far the easiest to drive fast there as the turn in grip and stability in the turns is such a massive improvement due to new suspension. 718 Spyder felt so slow, despite running high 1:37s because it was still way off what I run in GT3 or RS. I suspect GT4 RS will Split the gap between the 2
12-14-2022, 11:58 PM
