Quote:
Originally Posted by Wayno
I just watched the video and first corner it looks way over sprung. 6/5Kg are a good spring rate for stock bars on street tyres. The fast guys here use a higher rate on the front and push the car around the corners. I don't like that very much, but it's certainly fast when you can plant your foot down mid corner and know it's not going to swap ends.
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HA, that's actually exactly how I would describe how my car behaves normally.
The video is not really representative because almost all clip all are from the same 2 corners where I was playing around with the throttle. If I had posted a full lap it would be boring to watch.
You are probably right that it is over sprung for wet conditions. I never had that in mind when choosing the coilovers. Also the AD08Rs doesn't help either in the wet (I was overtaken by stock GTI hatchbacks probably on normal street tires).
Also worth noticing is that the first corner in the video was the most slippery corner on the whole track, especially on the dry line.
For comparison, here is a short clip with the same two curves in the dry.
[ame="https://www.youtube.com/watch?v=5TKSvUCmqhw"]Understeer in the dry - YouTube[/ame]
First the 180 deg Dunlop. Adding steering angle has no effect, other that that the front tires squeal more. You can see that I feel it out be adding/removing steering angle.
Thereafter the fast uphill "Schumacher S", and we are at "the first corner" from the wet videos. With quite substantial trail braking, the rear rotates a bit, there after the right hand curve leading to the back straight I can control the understeer by backing off the throttle a bit (at the cost of speed on the straight). These are scenarios where I want less understeer.
On the other hand, maybe I should be pleased that the rear is not trying to overtake me with 120 km/h, with my skill level. It did once on Zolder - I was trail braking, but not that hard, could be the EBD kicking in (no pedal dance):
[ame="https://www.youtube.com/watch?v=zQe5AgxK0zc"]Rear wheel drive explained... :-)) - YouTube[/ame]
Quote:
Originally Posted by nikitopo
I think you are worrying too much with tire pressures. I was also playing for some time with pressures and then got frustrated. All these little details ruin the fun factor and the driving pleasure of the car. Just relax, get used with a reasonable pressure (personally I use the manufacturer's recommendation) and focus on the driving technique. This is also the reason I am not tempted to buy coilovers. It would give me more parameters to worry. In anyway, you cannot break any track record with this car. So, what's the point?
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I agree to a certain extent. Though I think it's a matter of personal preference and goals.
The fun factor may be just as high with a stock car, or at least without worrying about setup and just drive with whatever you get. In this case you are right, that one can focus on driving technique and learn to work around behavioural shortcomings of the car.
But for me part of the fun is optimising the car so that it behaves the way I want it and to make it as fast as possible with what is possible with the setup. In the meantime I work on my technique as well to work with the setup the way it is at the moment. The video I posted are all clips of trying to get the car to stop understeering, which succeed to some extend. In the Dunlop curve (the cambered 180), if I just put my foot down the car would plow. By modulating the throttle I got it to rotate. A mid corner left foot dap on the brakes might have done the same but I was too chicken to try.
The combination of using different techniques and adjusting the car is what I find fascinating. Lap times in itself is not so interesting, but a way to measure if what is done different works or not. This is in part why I have little interest in the Nordschleife, because it's so long and, I think, has so many variable that it's difficult to make back-to-back lap time comparisons.
Although we won't set records with the car, there is a substantial 86/BRZ community here, and there is somewhat respect credits to be gained by setting a good lap time.
