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Analyze my alignment please

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Old 04-22-2011 | 12:00 AM
  #1  
Optical TDI's Avatar
Optical TDI
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Burning Brakes
 
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From: Cleveland, OH
Default Analyze my alignment please

After installing the RoW M030, I had it aligned at the dealer. Will these specs be cause abnormal tire wear?

Front Left
Camber: -0.3
Caster: 7.7
Toe: 0.04

Front Right
Camber: -0.3
Caster: 7.5
Toe: 0.05

Rear Left
Camber: -1.4
Toe: 0.16

Rear Right
Camber: -1.4
Toe: 0.15

Cross Camber: 0.00
Total Toe: 0.31
Thrust Angle: 0.00

I've put about 1,300 miles since the alignment and it looks like the inside of the rears are wearing quicker than the outside. Everything is within spec for the RoW M030 suspension it appears from the sheet.

I also feel that the front end wants to wander and doesn't want to stay on center.

Thanks for the feedback.

Last edited by Optical TDI; 04-22-2011 at 12:29 AM.
Old 04-23-2011 | 02:00 AM
  #2  
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X51
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James - I had my ROW M030 aligned to GT3 specs, so yours is more modest than mine, and mine is not that radical anyway. I don't see significant tire wear coming from your alignment - sure the rears may experience some with a touch more negative camber than stock, but it shouldn't be significant. Toe looks reasonable, but I'm puzzled why you say the front is tramlining (wandering). A little toe angle in usually makes it track nice and straight. Do you notice it on particular roads, rain grooved interstate lanes, etc.?
Old 04-23-2011 | 10:36 AM
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fpb111
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When I look at the specs for our cars I do not understand the front and rear toe specs.
IE: 0.00 to 0.05 not 0.00 to -0.05

When I had my 03 cab aligned the before reading was -0.02 on both fronts. After alignment it read plus on corrected spec, like James' printout above
I was always told that one wanted a small amount of toe-in on the front. That is front wheels pointed in towards each other at the leading edge or neutral, never out.
This is to keep from having toe-out which = wander.

I look forward to learning how toe is measured on our cars. Is it the back of the wheels that is spec'ed 0.00 - +0.05?
Old 04-23-2011 | 10:43 AM
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911SLOW
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^
WYSIWYG
Old 04-23-2011 | 11:15 AM
  #5  
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balefire
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you should comment on your alignment intent for your car. DE stability? autox agility? DD tire wear?

it appears you have toe out both front and rear since your toe values are positive.
most people would run toe in (a negative toe value) both front and rear.
in the front, toe in reduces wander
in the rear, toe in reduces acceleration instability

to reduce rear tire wear, you can reduce camber in the rear, but that would be at the expense of high speed cornering (e.g DE event) stability. toe in would also reduce rear tire wear.

i would also never trust someone to blindly set the alignment specs. it is easy for someone to put in in the "green" zone on their hunter alignment machines.




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