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Massive oversteer issues

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Old Jun 10, 2011 | 04:36 AM
  #101  
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Originally Posted by psychoazn
Can anyone explain this >_<
Lifting inside front tire is common, similar to how most fast fwd cars will lift the inside rear. It is surprising that the stock CR sway bar is capable of lifting the inside front. Looks like your bar and rear wing are effectively loading the outside front and rear tires.

-David
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Old Jun 10, 2011 | 06:58 AM
  #102  
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Originally Posted by dtenney
Originally Posted by psychoazn' timestamp='1307693224' post='20668350
Can anyone explain this >_<
Lifting inside front tire is common, similar to how most fast fwd cars will lift the inside rear. It is surprising that the stock CR sway bar is capable of lifting the inside front. Looks like your bar and rear wing are effectively loading the outside front and rear tires.

-David

That's very interesting! I have never seen a S2000 with a stock front bar lift the inside front that much. It makes me think that you do have something wrong. Like a blown rear shock or binding the the front. I would check the front suspension and make sure everything is moving the way it should, and the rear shocks. When I had a bad rear shock the car would step out then plant hard and hook up when I got on the gas. That looks like what's happening in the picture. So I am thinking bad rear shock.


It is hard to tell from just one picture what's really going on.
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Old Jun 10, 2011 | 07:40 AM
  #103  
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Originally Posted by rjones
It is hard to tell from just one picture what's really going on.
Here's the entire series. I believe its roughly a 0.3 second gap between each pic? I may be completely wrong, as I have no idea what camera was being used.

I believe it is turn 14, which is 1 degree off camber. The track map below may be a bit wrong...








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Old Jun 10, 2011 | 07:47 AM
  #104  
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I cannot tell, are both inside tires off the ground?
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Old Jun 10, 2011 | 07:49 AM
  #105  
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It looks like just the front, and only for a moment.

It's super hot, and there's some distortion in the images, but the tire is very "square" in the picture which makes me think its off. There's some others that were taken in the same spot that look similar, but not quite to that degree. Maybe it's all an optical illusion =X
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Old Jun 10, 2011 | 08:01 AM
  #106  
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The stock shocks have a good amount of rebound right? That might be part of it.
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Old Jun 10, 2011 | 08:31 AM
  #107  
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Originally Posted by eastcoastbumps
Dan, why weren't you at NHMS 1?
Wife's friend over from Paris, spent weekend w/ her and her fiancee. Shoulda dragged them to the track...

Some of this info would have been helpful! Paddy and I were debating changing the rear toe at the event. Would have been great to have another AP1 owner to chime in. Paddy wanted to put in more toe until we measured it and had me convinced not to reduce it.
Knock it down. WAY down. .2 degrees (no more than .3 degrees) total. Seriously.

The car felt a lot more manageable at the other tracks we went to last year. We'll probably reduce the rear toe and put in new diff fluid. Hopefully that sorts it out.
If you're really running .5" (1.15degrees?!) total, that gives HUGE driveability issues When my car had that much it was a serious handful.

Too much rear toe = good for nothing, bad for everything!
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Old Jun 10, 2011 | 09:55 AM
  #108  
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Originally Posted by psychoazn
Can anyone explain this >_<

Higher front roll resistance.
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Old Jun 10, 2011 | 12:27 PM
  #109  
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My inside front would lift when I was running without the rear sway bar and a Comptech adjustable in the front. With the same suspension settings but with the rear stock AP1 sway bar hooked up I now lift the inside rear. Installed an OS Giken LSD to handle the inside wheel spin and now have power under steer.
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Old Jun 10, 2011 | 12:32 PM
  #110  
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I think you just hit a bump before the last image and the camera caught you mid-jounce. Tire contact looks fine in the other pics. A bump would also explain why the rear is a bit elevated too.
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