Tail happy GT3
06-13-2009, 08:07 AM
#1
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Tail happy GT3
My battle against understeer has taken a drastic turn, one that has me apply significant opposite lock in most turns, furthermore as I try to practice trailbreaking. From a stock set-up, I went through:
- corner balance + front sway 1 off from full hard: barely made a difference
- lower ride height by around 15mm, front camber 2.5, rear camber 2.0 with adapted toe: very noticeable difference ! So different I ended up sideways very frequently and spun twice during the day.
Video.
This particular track is more Elise than GT3 playground, but helped zoom in on handling traits.
Now I am going to lower the rear a hair and increase camber to 2.5 in order to regain a bit of turn in stability and track out traction. My next stop is another trip to the Ring, I don't want the car to be hairy in Schwedenkreuz, Kesselchen or Schwalbenschwanz.
I am also wondering whether the Corsa System are ageing well. This set has barely 3Kmi, but they don't seem to be holding up as well as my previous set.
- corner balance + front sway 1 off from full hard: barely made a difference
- lower ride height by around 15mm, front camber 2.5, rear camber 2.0 with adapted toe: very noticeable difference ! So different I ended up sideways very frequently and spun twice during the day.
Video.
This particular track is more Elise than GT3 playground, but helped zoom in on handling traits.
Now I am going to lower the rear a hair and increase camber to 2.5 in order to regain a bit of turn in stability and track out traction. My next stop is another trip to the Ring, I don't want the car to be hairy in Schwedenkreuz, Kesselchen or Schwalbenschwanz.
I am also wondering whether the Corsa System are ageing well. This set has barely 3Kmi, but they don't seem to be holding up as well as my previous set.
Last edited by ze_shark; 06-13-2009 at 10:43 AM.
06-13-2009, 11:39 AM
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if you get understeer from there either go to one from soft in rear or one from full hard in the front but not both. Keep in mind the preload when you do the front.
06-13-2009, 11:42 AM
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tires are probably your culprit but try the rear sway first.
Consider increasing rear camber to .2 less then the front. so it will "snap" less at your next alignment.
You know your rear toe may be off as well. check that.
Consider increasing rear camber to .2 less then the front. so it will "snap" less at your next alignment.
You know your rear toe may be off as well. check that.
06-13-2009, 12:43 PM
#5
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Shark,
You mentioned "Adaptive Toe". What is that?
To get your base line, get a new set of tires. Old, heat cycled tires will give you fits when trying to set up a car. Don't ask how I know.
Once you have fresh tires, try one from full hard in the front and one from full soft in the rear. This should induce some understeer.
Finally, if your practicing trailbraking, I would go with 4mm rear toe IN at the rear. This will keep your back end stable going into braking and then turning into trailbraking zones.
Good luck.
You mentioned "Adaptive Toe". What is that?
To get your base line, get a new set of tires. Old, heat cycled tires will give you fits when trying to set up a car. Don't ask how I know.
Once you have fresh tires, try one from full hard in the front and one from full soft in the rear. This should induce some understeer.
Finally, if your practicing trailbraking, I would go with 4mm rear toe IN at the rear. This will keep your back end stable going into braking and then turning into trailbraking zones.
Good luck.
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06-14-2009, 12:38 AM
#10
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Shark,
You mentioned "Adaptive Toe". What is that?
To get your base line, get a new set of tires. Old, heat cycled tires will give you fits when trying to set up a car. Don't ask how I know.
Once you have fresh tires, try one from full hard in the front and one from full soft in the rear. This should induce some understeer.
Finally, if your practicing trailbraking, I would go with 4mm rear toe IN at the rear. This will keep your back end stable going into braking and then turning into trailbraking zones.
Good luck.
You mentioned "Adaptive Toe". What is that?
To get your base line, get a new set of tires. Old, heat cycled tires will give you fits when trying to set up a car. Don't ask how I know.
Once you have fresh tires, try one from full hard in the front and one from full soft in the rear. This should induce some understeer.
Finally, if your practicing trailbraking, I would go with 4mm rear toe IN at the rear. This will keep your back end stable going into braking and then turning into trailbraking zones.
Good luck.
BTW are you using your wheels as freaking jackstands in your avitar you nut?
see you on monday! all the cool kids are wearing suits.