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Old 07-26-2000, 07:05 PM   #1
Patrick Olsen
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Join Date: Jul 1999
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Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Post Suggestions to correct inside front tire spin at auto-x?

I've noticed at just about every auto-x I go to that on the really tight corners I'll spin the inside front tire. I honestly don't remember if this happened on street tires, but it's definitely happening with my Kumhos. Perhaps with the extra grip, the car is rolling more, unloading the front tire too much. Anyway, it makes the steering kinda vague coming off the corner, and obviously isn't the fast way out of a corner.
As of now the suspension is stock with the exception of an 18mm rear sway bar (this is on a Legacy) and a front strut tower brace. I'm pretty sure the way to keep that inside tire planted is to put in a bigger front sway bar, and I know those are available in the aftermarket. What I'm unsure of is how that bigger sway bar will affect the overall handling of the car. A bigger front sway bar means more understeer, so will the bigger front wipe out the benefits of my 18mm rear bar? If I then upgrade to a bigger rear bar (let's say Whiteline's 20-24mm adjustable), does that then wipe out the benefits of the bigger front bar? I guess that's kind of a stupid question, but I don't want this to develop into a vicious circle of bigger front, bigger rear, ooops now I need an even bigger front, oh wait now I need more in the rear.....

Has anybody else experienced the inside tire spin problem? Perhaps the smaller Impreza is not susceptible to this. Actually, KC, who I auto-x'd with this past weekend, lifts his inside REAR tire, not the front, so it appears the Legacy and Impreza are different in that respect.

Anyway, any advice you could give me would be greatly appreciated.

Edit: I wonder if an anti-lift kit would help to minimize this problem. Any thoughts on that?

Pat Olsen
'99 Legacy 2.5GT 5speed sedan

[This message has been edited by Patrick Olsen (edited July 26, 2000).]
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Old 07-26-2000, 08:01 PM   #2
slide
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Hmm I dont have that prob on my legacy but I am a lot further on with my suspension upgrades. You are definitely going to want to stiffen the roll resistence on the front end. and since its lifting... I havent touched my front sway bar. But springs and struts.

If the tire is lifting on entry to mid turn its the sway bar. If it is lifting mid to exit then its spring rate.

a bit dodgy but thats all my notes say.
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Old 07-26-2000, 08:05 PM   #3
Scooby South
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Hey Patrick...how about the solid Sway bar endlinks for the front...MRT and Teagues have them...But that might also overinduce your understeering problem again. the AntiLift kit should help out alot.....Just change out the whole freakin suspension...ROFLMAO...J/K..
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Old 07-26-2000, 08:49 PM   #4
Patrick Olsen
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1997 Legacy 2.5GT
QuickSilver Metallic

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Slide - I would say it's more the mid corner to corner exit where this is a problem. As I start to get on the power again I think the body roll combined with the front end lift from acceleration just unloads that front inside tire too much. What is your combination, and on what model car?

New springs was definitely another thought that had entered my mind, but I don't think I want to lower the car at this point. I think what would really be sweet would be an adjustable coil-over setup - that way I could keep near stock comfort and stock ride height on the street, and then tighten/lower things for auto-x/OT events. However, the knowledge base for the Legacy seems much smaller when it comes to coil-overs (what spring rates work best, etc), and I'm not sure I want to spend that much money on the car right now anyway. The funny thing is that my Legacy is my "civilized" car, and yet I'm about to order a set of dedicated racing rims for my racing tires, and I'm considering substantial modifications to the suspension. Meanwhile, my "fun" car sits in the driveway waiting for parts.

Back to the subject, I think I'd be more inclined to try a bigger sway bar and the anti-lift kit first, to see what they do for me. If I decide to upgrade the springs/shocks/struts later, those components would still be worthwhile I think.

Pat Olsen
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