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Old 06-15-2008, 12:02 PM   #1 (permalink)
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Default Camber. Converting inches to degrees?

Also posted in the autocross/roadracing forum.

Does anyone know how to convert inches to degrees for a camber reading?

Using a straight edge on the face of the wheel, I shimmed up the straight edge so it was perfectly plumb up and down. Then I measured from the straight edge to the top of the wheel, which was 1 3/16". Then measured from the straight edge to the bottom of the wheel, 1/2" or 8/16". Making a difference of 11/16". So the top of the wheel is 11/16" more in-ward than the bottom.

Can anyone give me the formula to convert these numbers, or am I wasting my time trying to figure it out? This is for a 17" wheel
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Old 06-15-2008, 07:07 PM   #2 (permalink)
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easy enough with some basic trig.

You need to know the EXACT distance between the two points you measured. The face on a 17" wheel is usually in the 18" range. Given that, and everything being measured exactly right, you have roughly -2.2 camber.

Right Triangle Angle And Side Calculator for easy calculation. Just enter side a and side b and it'll give you the rest.
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Old 06-15-2008, 07:09 PM   #3 (permalink)
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Damnit. Too slow again!
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Old 06-15-2008, 08:53 PM   #4 (permalink)
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I got the calculater posted in my other thread, but thanks anyways. after you mentioned the wheel being more around the 18" size, I went out and measured the wheel. came out to 18.5" across. never knew that about my wheels, thanks for the imput.
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Old 06-15-2008, 09:00 PM   #5 (permalink)
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with the new measurements I came out with 2.13 degrees of neg camber. It sure looks like there is more negative camber than what was calculated, but I guess I was coming from 0 camber. just not used to seeing that much. I will take measurements of the rears tomorrow and see what they are at. (edit) curiosity got to me so I went out and measured

Front:

2.13 Negative Camber
1/16" - 1/8" Toe Out

Rear:

1.2 Negative Camber Passenger Side
1.8 Negative Camber Drivers Side
1/8" Toe Out


Any thoughts on my set up for a road course?


Also running Inverted BC's 6K front/4k rear, Budget sways with ES endlinks front and rear. 225/45R17 RT-615's

Last edited by Hi N Mity; 06-15-2008 at 09:15 PM.
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Old 06-16-2008, 05:03 AM   #6 (permalink)
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I would try to even out the rear camber just so the handling is the same left/right.
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Old 06-16-2008, 05:55 PM   #7 (permalink)
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messing with the camber in the rear sounds like a pain in the ass with only camber bolts to adjust with. I dont have rear camber plates yet. I am not to worried, since PIR is a mostly right hand turn track. out of 12 turns, 4turn to the right, but only 2 of those are on the sharper side.
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Old 06-16-2008, 06:03 PM   #8 (permalink)
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Old 06-16-2008, 06:04 PM   #9 (permalink)
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