Road Racing / Autocross & Time Attack Road Racing / AUTOX, HPDE, Time Attack

what is the ideal toe setting on a road coarse??

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Old Aug 3, 2002 | 12:42 PM
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underrated99si's Avatar
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From: SOCAL
Default what is the ideal toe setting on a road coarse??

Well I was told to get the front as much toe out as possible within factory specs and the back to be at 0 is this good or bad. I went ot buttonwillow with this set up and one of the instructors said my car was on rails and not ot change a thing but I wanted to hear what you all have to say.

my set up suspection wise is
Progress coilovers @ 22mm rear sway bar and factor upper front strut bar
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Old Aug 3, 2002 | 01:47 PM
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Default Well....

..my toe settings are: 1/32 total toe out up front and 3/32 toe in out back. Having just run at Willow Spring-the Bid track- I can vouch that the settings plant the car extremely well, the car is planted period. If your in the LA area you should give West End Alignment a call, and have Darrin set up your car.


[Modified by bb6h22a, 2:48 PM 8/3/2002]
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Old Aug 3, 2002 | 10:29 PM
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Default Re: Well.... (bb6h22a)

coo thanks for the help and I am thinking that the toe in on the rear helps rotate the car in low speed 90 degree type corners or S's
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Old Aug 4, 2002 | 12:31 AM
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Default Re: Well.... (underrated99si)

Front Wheel Toe
Purposer:
To stabilize the car in straight line driving, and to help steering responsiveness.

How:
Viewed from the top of the car, toe is the amount of angle the wheel has relative to the front-to-back centerline of the car. It is measured by the difference in the distance between the front edges of the wheel rims versus the rear of the wheel rims. If the front edges are wider than the back edges, the toe is "out." If the front edges are closer together than back edges, the toe is "in." The units are length (inches, mm, etc.) rather than degrees.
For racing, front toe-out is preferred to increase steering responsiveness and help minimize understeer. However, this may make the car unstable in straight lines during street driving.

Optimally the front is a balance between straight line stability (acheived with toe-in) versus quick steering response (acheived with toe-out).
Too little: Sluggish steering response. Increased understeer.
Too much: Very nervous in straight line driving. The car will want to wander and is easily led by road surface features like seems, cracks, etc. Can also cause rapid tire wear.

Typical range is 1/8" to 1/4" total toe out. 1/4" can be extreme for the street.

Rear Wheel Toe
Purpose: For most street and track applications, rear toe-in is preferred to stabilize straight line driving.
Too little: The rear of the car will be less stable in straight line driving.
Too much: Tire wear will be accelerated.

Typically the factory settings are suitable.

per turnfast.com

So, actually toe settings are NOT really responsible for rotating the car; tire pressure, spring rates, and anti-roll bar's are what are more instrumental in aiding you roatate the car, as well as wheel size/tire profile, etc.



[Modified by bb6h22a, 1:34 AM 8/4/2002]
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