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Tuning suspension- understeer at corner exits

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Old Jan 23, 2010 | 08:40 AM
  #21  
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Going clockwise, at the big carousel on the left end and the little keyhole before the hot pits going into the smaller straightaway. No problems whatsoever otherwise. I don't remember having these problems running CCW, when there was no transition preceeding the problem area. This is the only track I've run on since fixing the previous oversteer problem. Running out to the edge of the track on corner exit is not an issue. It's just the middle of the turns.

Last edited by 12AutoX; Jan 23, 2010 at 08:43 AM.
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Old Jan 23, 2010 | 10:09 AM
  #22  
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Oh... that might be tough to try some of the driving suggestions due to that choke down key hole.
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Old Jan 23, 2010 | 01:29 PM
  #23  
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Originally Posted by 12AutoX


Going clockwise, at the big carousel on the left end and the little keyhole before the hot pits going into the smaller straightaway. No problems whatsoever otherwise. I don't remember having these problems running CCW, when there was no transition preceeding the problem area. This is the only track I've run on since fixing the previous oversteer problem. Running out to the edge of the track on corner exit is not an issue. It's just the middle of the turns.
Do you know if the elevation changes or camber?
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Old Jan 23, 2010 | 06:31 PM
  #24  
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The couse is completely flat. The keyhole is the part that gives me the most understeer trouble. It's just tight. I'm taking it in 3rd gear- Z's have such great torque!
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Old Jan 24, 2010 | 06:50 AM
  #25  
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Have you walked the track to see if there is anything different at those two turns?
I am going to see if I can find video online.
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Old Jan 24, 2010 | 07:05 AM
  #26  
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OK, looking at this:

http://www.youtube.com/watch?v=RylPGieNCN4

it looks like Turn 2 of Clockwise (Turn 15?) the camber changes right after the apex. Most likely its for drainage of the turn. With out actually looking at the track I am not sure if you want to apex slightly before or slightly after.


Option one - Apex a little later and a little quicker knowing that the rear will get light as the camber changes.

Option two - Apex a little earler but accelerate harder and adjust for the push that will occur towards the exit.

I would go for option one, turning in slightly quicker and then opening up the steering sooner than normal.

Maybe the same for the keyhole. I would recomend walking the track sometime and see exactly where the camber changes occur and finding good markers for each turn. I walk every track I run. You never realize what you miss when traveling at speed.

Last edited by mhoward1; Jan 24, 2010 at 07:07 AM.
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Old Jan 24, 2010 | 08:21 AM
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Good find Marty, it looks like the Ariel is having trouble mid corner there as well. I wouldn't call it a push but that section of track looks like it requires throttle control and slower speeds. I agree with what Marty said with the later apex so you can be a little more aggressive on throttle application on exit but I think this is just a classic give and take corner.

Last edited by Zazz93; Jan 24, 2010 at 08:26 AM.
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