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Old 11-06-2008, 12:15 PM   #1
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Time for an alingment.

I have the roush suspension which is a 1.75 inch drop in the front and rear. Though I did take an extra inch off the rear spring so the rear would be as low as the front.

So

Which is best for the front tires? Toe-in or toe-out? Also how much toe-out in the rear? I know toe-out in the rear causes the car to be very reactive, which is what Iím aiming for.


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Old 11-06-2008, 12:49 PM   #2
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for front tires you want just a little bit toe out (~1/16"). the moment generate by the tires pulling against the ground will straighten it when you're driving.

for the rear, i would recomend 1/8" or 1/16" total toe out, unless you auto-x and want more but at the expense of tire wear. in that case, max 1/4" total toe out.
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Old 11-06-2008, 12:57 PM   #3
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Ok. Can you translate that into something using a deciminal? (0.01)
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Old 11-06-2008, 01:49 PM   #4
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Bump
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Old 11-06-2008, 03:34 PM   #5
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Insane, where's your junior high math skills?....1/16=0.0625", 1/8=0.125", 1/4=0.25".

I'm a little bit more conservative than thenorm and prefer a max of .04" of rear toe-in per side and 1/32" toe-out per side up front (did that on purpose so you can practice). Toe out in the rear may be OK for an autocross machine but it can be a real hand full on the road (especially at freeway speeds where a sneeze or reaching for the radio can cause you to change lanes or inadvertently letting of the gas or braking quickly in a curve could induce undesirable snap oversteer. Little things add up quickly.
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Old 11-06-2008, 07:28 PM   #6
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Lol I did do that, but .125 just seem'd higher than what i was expecting so I thought I must have done it wrong.

There is a big parking lot 1 1/2 miles away from my house where I practice all the time.
I'm looking for snappy steering, but I dont want my rear tires to wear out quicker than a year.
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Old 11-06-2008, 08:53 PM   #7
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So after lowering car, an alignment is a must?
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Old 11-06-2008, 09:30 PM   #8
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It's recommended. If its done right which is what I am trying to figure out at the moment, it can greatly affect the drivability of the car.
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Old 11-07-2008, 09:32 AM   #9
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Quote:
Originally Posted by focusboy5 View Post
So after lowering car, an alignment is a must?
Absolutely! Lowering the car affects suspension geometry which in most cases increases camber and modifies toe settings. The only way to correct those changes is an alignment.
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Old 11-07-2008, 09:37 AM   #10
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Quote:
Originally Posted by Insane View Post
Lol I did do that, but .125 just seem'd higher than what i was expecting so I thought I must have done it wrong.

There is a big parking lot 1 1/2 miles away from my house where I practice all the time.
I'm looking for snappy steering, but I dont want my rear tires to wear out quicker than a year.

1/16 to 1/8" is a LOT of rear toe-out and will cause dramatic handling changes. It may be snappy in the parking lot but could be down right scary on the street.
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