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post #1 of 11 Old 05-25-2011, 06:28 PM Thread Starter
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? on tire wear need advice!

The car is a 03 mach1 with MM suspension frnt coilovers stock kmember with MM A-arms bilstein hd struts + MM caster/camber plates, my rear suspension consist of a trq arm and panhard bar with MM adj LCA and hd shocks, the spring rates are 350#'s for the front and 330/340# trq arm springs for the rear.My caster/camber plates are in the neg orientation,my alignment settings are 5.31 deg+ caster on the lft and 5.62 deg on the rt camber is -1.8 deg with zero toe,i checked the tire wear and the out side edges on both side seem to have excessive tire wear the rt side is also cupped what should i do to correct the problem the car is 95% street driven sorry for the long post. Rob


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post #2 of 11 Old 05-25-2011, 09:06 PM
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How was toe measured? Sounds like the tires want a bit of toe in. I also wouldn't run that much neg. camber on the street if that's the only driving the car sees. I would reduce it to -1.2 to -1.3.


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post #3 of 11 Old 05-25-2011, 09:51 PM Thread Starter
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Just a few track days a year and i only drive the car about 6800 miles a year,i have another car for driving daily.

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post #4 of 11 Old 05-25-2011, 11:34 PM
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If he reduces the negative camber he's likely to get more wear on the outside.
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post #5 of 11 Old 05-26-2011, 01:01 AM Thread Starter
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When i went by the tire shop there #1 alignment guy was talking about trying more neg camber on the left side but not sure,what would you recommend and should i get a bumpsteer kit?

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post #6 of 11 Old 05-26-2011, 10:09 AM
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The type of wear he describes as cupping is not caused by camber. I have seen it caused by to much toe out or toe in, a bad shock or a worn out part. If the wear on the outer edges of the tires is due to not enough camber then he is driving very hard on the street and he did not describe his driving style in his post. He did mentioned that the car was 95% street driven.

In a later post he mentions he does some track day as well. I know that when I did track days with a dual purpose car I made changes to the alignment to maximize grip and reduce tire wear on track and then changed it back to the more mild street settings. Perhaps he is not doing this and seeing higher tire wear as a result. One reason I won't do track days with a FOX street car.

On a mostly stock street driven FOX I would run camber settings similarto what he does but on a modified FOX as he has I feel I could run less neg. camber due to the better suspension geometry those parts have over stock. Less deflection in the bushing, etc.

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Last edited by Jim Brozynski; 05-26-2011 at 04:58 PM.
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post #7 of 11 Old 05-26-2011, 10:43 AM
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Sorry I didn't see cupping in that hot mess of a post.
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post #8 of 11 Old 05-26-2011, 02:51 PM Thread Starter
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I do tend to drive aggresivly on the street but not all the time maybe 40% of the time,i only put about 160 mile a month on the car.

Rob: 03 A.B Mach1 5spd

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post #9 of 11 Old 05-29-2011, 05:24 PM
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I cant remember the term for what Im about to describe but I havent seen anyone else mention it so Ill throw it out.

If the front and rear end arent squared to each other then that could cause tire wear problems because the car is crabbing as it is going down the road. The rear tires possibly arent following right behind the fronts and causing excessive front tire wear.

What tires? How old are they? Just a thought if they are crap tires then they may just not wear well.
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post #10 of 11 Old 05-30-2011, 01:19 AM
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Was the alignment done with you or simulated weight in the car?

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post #11 of 11 Old 05-30-2011, 04:33 AM Thread Starter
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the tires are BFG kdw2's been on the car since 08 the alignment was just your standard alignment.

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