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Old 04-24-2004, 11:46 PM   #1
makofoto
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Default Actual Figures: Toe Change when Changing Camber

A number of us were wondering how much the toe changes when changing the camber on our WRX's.

Darrin, at West End Alignment in Gardena, CA, did a bit of extra work for me to come up with these figures ...

With my NRX camber plates ... I have three degrees of camber range. At the moment I have mine set so I can go from - 1 to -4. But, without adjusting the toe ... I don't think one would ever want to use all of that range. Going from from -1 to -4 ... the total toe will change 9/8th of an inch!

So, for every degree of (negative) camber change ... there is 3/8th of an inch change in toe.

I had Darrin set my alignment so that I have 1/8th inch total toe-IN at -2.5 camber. At -3.5 camber, I have 1/4 inch (2/8th) toe-OUT. At -4.0 camber ... I would have a whopping 7/16th ... almost 1/2 inch of total toe-out.

Is that TOO MUCH toe-out to ever consider using in AX ... ? I'm hoping - 3.5 will be my "general" AX camber setting. How much toe-out would most of you consider desirable ?

When I set my camber plates for zero toe ... about -2.8+, my WRX, with Azenis tires, tends to wander ... especially on grooved Fwys. Seems like the car wants a bit of toe to have straight line stability.

Next ... calibrating my tie rods so I can adjust my toe ...
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Old 04-25-2004, 05:36 AM   #2
afpdl
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The amount of toe change will also vary depending on how much caster you have.
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Old 04-25-2004, 01:48 PM   #3
HoRo1
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Default

Quote:
Originally posted by makofoto
A number of us were wondering how much the toe changes when changing the camber on our WRX's.

I had Darrin set my alignment so that I have 1/8th inch total toe-IN at -2.5 camber. At -3.5 camber, I have 1/4 inch (2/8th) toe-OUT. At -4.0 camber ... I would have a whopping 7/16th ... almost 1/2 inch of total toe-out.

Is that TOO MUCH toe-out to ever consider using in AX ... ? I'm hoping - 3.5 will be my "general" AX camber setting. How much toe-out would most of you consider desirable ?
I did a time trial with just under 1.75" toe out (total). I was not a happy camper. Car all over the place under brakes, weird understeer etc
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Old 04-25-2004, 04:02 PM   #4
jmott
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Quote:
Originally posted by afpdl
The amount of toe change will also vary depending on how much caster you have.
it may also not be linear, hehe
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Old 04-26-2004, 12:00 AM   #5
makofoto
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I forgot to say that in our "test" ... we double checked the calculated toe with three camber positions ... and they corresponded perfectly ...
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Old 04-26-2004, 12:02 AM   #6
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Quote:
Originally posted by jmott
it may also not be linear, hehe
As long as your caster stays constant I dont see why it wouldnt be linear?
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