Picking Up A GT3 Today
Discussion
Its off camber there so you need to be very careful, especially in a 911 where the weight bias is rearward. If you carry too much speed in and are on a trail there, you will get oversteer. The way the diff is set up on the GT3, more often that not the car is more settled on the brakes after turn in than on a trail. I carry a lot of speed into that corner but im still snagging the brakes at the apex. Because of the adverse, Its a real trade of between neutral and oversteer there al the way to the apex. You will need to drive the 911 quite differently to a caymen. Its all about finding a balance under braking to apex then using throttle on exit. It takes a bit of getting use to but once you get the hang of it you'll be doing 1.51's :-)
jackwood said:
So, is a 1:51 of Oulton full circuit possible in a standard Mk2 on PS2's?
Careful - That kind of number chasing usually ends up with a trip to the kitty litter or worse!Track days, time trials and racing all very different events.
On the PS2 front, they aren't good track tyres. On a road local to me, they get very squirmy and lose grip after about 8 miles of cracking on in the dry.
jackwood said:
So, is a 1:51 of Oulton full circuit possible in a standard Mk2 on PS2's?
Ha ha well as just said, I wouldn't be chasing times. Maybe it's on with a pro driver and the right set up but with a PS2 you've got a sweet spot of one lap to do it! Seriously, I think a 1.58 is a very decent effort for a driver new to GT3's. Well done, you clearly have a decent amount of track driving experience. There is always a trade off between road compliance and track performance, especially in a GT3 which allows a chasis tuner to apply a very sharp (high levels of neg camber etc) set up. The downside is twitchy road performance, and increased tyre wear. My 996 has almost a race set up on it and I find it fine on the road but it only gets occasional use. Not sure I'd be quite so smitten doing 15k a year in it. Either way, welcome to the world of GT3 ownership, I hope that your car brings you much pleasure.jackwood said:
I h'n't all my shifts. So yes they are rev matched. When it spun I was on a balanced throttle, no brake, no gear change, no steering input, nothing.
After seeing it and reading this.. I'm a bit puzzled on that considering how rapidly it let go and switched ends.Good vids, looked a fun day.
FisiP1 said:
jackwood said:
I h'n't all my shifts. So yes they are rev matched. When it spun I was on a balanced throttle, no brake, no gear change, no steering input, nothing.
After seeing it and reading this.. I'm a bit puzzled on that considering how rapidly it let go and switched ends.Good vids, looked a fun day.
keep it lit said:
i used to rent one in Chorlton for a tenner a week about ten years ago.. found it advertised in a shop window.. now fortunate enough to own a large workshop where my car lives eight feet in the air on a two post ramp when not been driven.. worked damn hard for that priveledge.
Please post a pic of this 
Mutt said:
FisiP1 said:
jackwood said:
I h'n't all my shifts. So yes they are rev matched. When it spun I was on a balanced throttle, no brake, no gear change, no steering input, nothing.
After seeing it and reading this.. I'm a bit puzzled on that considering how rapidly it let go and switched ends.Good vids, looked a fun day.
Is this what is referred to as 'lift-off-oversteer', or does that happen more into the bend
Basically the entry speed would have been fine if there were no adverse after turn in. The spin was caused by the adverse and probably a reduction of tyre grip as the PS2's went off. As I said, 911's do not like adverse camber, there is also a small bump just before the camber drops away which compounds the problem. Many drivers take a tight entry line to the corner and open it up after the apex to get round it. I take that line when I'm racing but in quali when the tyres are stronger I take a wider entry. A tighter entry line will help reduce the effects of the adverse camber. 911's are very sensitive to camber changes because of thier rearward weight bias. If you are not completely dialled into a 911, never push hard in negative camber if the chasis is loaded or it is liable to bite you
Steve Rance said:
Basically the entry speed would have been fine if there were no adverse after turn in. The spin was caused by the adverse and probably a reduction of tyre grip as the PS2's went off. As I said, 911's do not like adverse camber, there is also a small bump just before the camber drops away which compounds the problem. Many drivers take a tight entry line to the corner and open it up after the apex to get round it. I take that line when I'm racing but in quali when the tyres are stronger I take a wider entry. A tighter entry line will help reduce the effects of the adverse camber. 911's are very sensitive to camber changes because of thier rearward weight bias. If you are not completely dialled into a 911, never push hard in negative camber if the chasis is loaded or it is liable to bite you
Excellent post, thanks.Steve Rance said:
Ha ha.. Nope it's fine, bumps like that are great because they just add to the challenge of the circuit. The one on the exit of Druids is brilliant!!
Yes, love the one at the exit of Druids. Have to really try and get the car straight before you hit that or you are in a world of s
t, and probably the Armco. The question about would this happen in a PSM equipped car: Steve, I think he means PSM (Please Save Me!) rather than PASM.
I never had anything like this incident in the Cayman, but I don't know if that is because of PSM or because of the less rearward biase of the car.
Was this lift off oversteer? I would say no. I didn't lift. If I had lifted the back would have come round MUCH faster and I almost definitely would have hit the Armco on the inside. The GT3's attitude in a corner is MUCH more sensitive to throttle input than the Cayman was.
I see this as the car being loaded in the bend, hitting the bump, and that unsettling the rear and throwing it around. It went quickly because the tyres had gone off. Coming into Old Hall the rear let go slightly and really that should have been my warning. Some dust on the track certainly didn't help. Finally, I wasn't a goods enough to catch it
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