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Old 10-24-2017, 08:24 AM   #743
Norm Peterson
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Drives: 08 Mustang GT, 10 Legacy 2.5GT, ...
Join Date: Jul 2012
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Posts: 4,953
Quote:
Originally Posted by The_Stache View Post
Need thoughts on new setup...

Running autox and hpde's (6-9 events a year) and daily driving on 2nd set of wheels/tires..

Hardware is: coilovers, rear and front sway bars, rear trailing arms and toe arms, 305/30r19s (race setup), 285/35 r20 (daily),poly bushes all around... sitting at about 400 rwhp...

Previs setup worked great... but wondering if I'm leaving more grip on the table..

Front:
Camber: -1.4 to -1.6
Caster : fixed
Toe: 1/16 total

Rear: -1.0 to -1.2
Toe: 0.00 total

Thoughts?
Is it understeering or oversteering? I'd start by pushing camber further negative on the end that's giving up first while leaving the other end alone.

If cornering in your daily driving gets enthusiastic enough, often enough, front cambers as high as -2.0° are do-able without getting into wear that's too uneven. Toe that's somewhere between zero and a tiny bit 'in' will definitely make for less 'twitchy' daily driving and may help keep the wear a little more even.

I do remember a Fox-body competitor at autocross who would change front toe to a "competition setting" for autocross and back again for the drive home. I used to do the same thing with front camber on a '79 Malibu. Both of these cars were stick-axle, but the idea of making temporary alignment changes to best suit the situation at hand stays the same.


Killboy - the conversion from degrees to inches for a 28" tall tire is pretty close to 1/2" per degree. Tangent of the toe angle times the tire OD.


Norm
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'08 GT coupe 5M, wheels, tires, pads, fluid, a few suspension mods . . . still almost at stock height
'10 LGT 6M (hers) and an '01 Maxima 5M (spare)
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