03-25-2014, 02:09 PM | #1 |
Drives: Red 2010 Camaro Join Date: Jun 2012
Location: Lynn In.
Posts: 88
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Need Help With Camber Measurement
Would some one who has had their REAR WHEELS aligned with a MINUS ONE DEGREE OF NEGATIVE CAMBER or close, PLEASE take the edge of a 24 in level, holding it against the LOWER BOTTOM RIM LIP, and measure the distance from the TOP RIM LIP to the edge of the level.
What I am trying to determine, is how much the wheels are ACTUALLY TILTED in at the top of the wheels with approx. ONE degree of negative camber. I am using a 19 BY 10 in. wheel in back , and a 18 BY 8.5 in wheel in the front using custom built FORGED conversion wheel adapters. After lowering my Camaro a full TWO inches using Pfadt Feather Light Coil- Overs, my wheels are tilted in 5/8 of an inch, which I think is about THREE degrees of negative camber. I am just trying to get some base line dimensions< from some one who has had their camber set at MINUS ONE DEGREE or close. I have attached a few pics for reference. Thank You In Advance for your help, Red 2010 Camaro |
03-25-2014, 03:22 PM | #2 |
Drives: 2011 Camaro SS L99 Join Date: Jan 2012
Location: Perry, GA
Posts: 553
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Why not use math? Stock tires on a Camaro SS are 28.7" in diameter, or 14.35" in radius. The tangent of a 1* angle is 0.017455. Multiply the tangent times the radius and you get 0.2505 for the length of the alpha leg of the triangle. Therefore, the horizontal difference from top to bottom of the centerline of the tire/wheel is 0.501", which means the bottom of the tire is 1/2" farther away from the differential than the top of the tire. If you have different diameter tires you can substitute their radius. Tangent of a 2* angle is approximately (not exact, but close enough to the 5th decimal point) twice that of 1* angle, and so on.
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03-25-2014, 05:20 PM | #3 | |
Drives: Red 2010 Camaro Join Date: Jun 2012
Location: Lynn In.
Posts: 88
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Quote:
Would some one PLEASE just measure what I asked for? Thank You Red 2010 Camaro |
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03-25-2014, 05:28 PM | #4 |
Drives: 14 1SS Camaro 1LE, NPP, Recaros Join Date: Nov 2013
Location: NC
Posts: 819
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use a app on your phone, they have digital readings, put it flush to your level, but you need to be on a flat surface
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03-25-2014, 05:36 PM | #5 |
Drives: Red 2010 Camaro Join Date: Jun 2012
Location: Lynn In.
Posts: 88
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03-25-2014, 05:49 PM | #6 |
Drives: 2011 Camaro SS L99 Join Date: Jan 2012
Location: Perry, GA
Posts: 553
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Just divide 26.3 by 28.7 times .501 and you'll get your answer. If you can understand one of those fancy phones (which I can't), just use its calculator. The answer is 0.459". Nothing Wizardly about it, basic trig. 3* negative camber would be 3 times that, or 1.37". Assuming your 19" wheel has a 1/2" lip, measuring at the lip you should see 0.349" difference from bottom lip to top lip for each degree of negative camber.
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03-25-2014, 06:02 PM | #7 | |
Drives: Red 2010 Camaro Join Date: Jun 2012
Location: Lynn In.
Posts: 88
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Quote:
Thanks Again For Your Help. Red 2010 Camaro |
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03-25-2014, 06:07 PM | #8 | |
Drives: Red 2010 Camaro Join Date: Jun 2012
Location: Lynn In.
Posts: 88
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Quote:
Thanks Red 2010 Camaro |
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03-25-2014, 06:34 PM | #9 |
Drives: 2011 Camaro SS L99 Join Date: Jan 2012
Location: Perry, GA
Posts: 553
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Red, I would venture a guess that I have been out of school longer than you, I'm 69 years old. I'm too old to understand these fancy phones. If you will give me the diameter of wheel where you want to measure it, I can tell you what the difference in measurement should be for each degree of negative camber. It will probably be very close to the .349" if it is a 19" wheel.
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03-25-2014, 07:58 PM | #10 | |
Drives: Red 2010 Camaro Join Date: Jun 2012
Location: Lynn In.
Posts: 88
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Quote:
Red 2010 Camaro |
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03-25-2014, 08:48 PM | #11 |
Drives: One of the baddest handling Gen 5s Join Date: Feb 2011
Location: Masachusetts
Posts: 4,177
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every 26.3" tire I have actually measure 26" new and mounted.
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03-26-2014, 09:47 AM | #12 | |
Drives: Red 2010 Camaro Join Date: Jun 2012
Location: Lynn In.
Posts: 88
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Quote:
Went out this morning and measured a spare 19 inch wheel with no tire mounted, and the OUTSIDE WHEEL FACE diameter measures 20.500 in. The inside WHEEL LIP DEPTH where the tire bead makes contact on the INNER WHEEL BARREL is .750 or 3/4 in. If you multiply this 3/4 in. dimension TIMES TWO which equals 1.500 in. and subtract it from 20.500 you do in fact get a WHEEL BARREL diameter of 19 in. My FINAL QUESTION is, what would the the dimension be for EVERY ONE DEGREE or NEGATIVE CAMBER of the 19 BY 10 in. wheel after installing it on the Camaro. I have a level cut to a 20.500 in length, and will be checking the NEGATIVE CAMBER of the wheel by using the edge of the level, contacting the wheel at the bottom, which would be the 6 O CLOCK position. I will then measure the dimension at the top of the level at the 12 O CLOCK POSITION, from the edge of the level to the wheel face, after CENTERING the SITE GLASS BUBBLE. I can then figure the CORRECT TOTAL CAMBER of the wheel after knowing the correct dimension for ONE DEGREE OF CAMBER. Using the above method, the Camaro is currently at 5/8 in or .625 of NEGATIVE CAMBER after lowering a full TWO INCHES. I have been told that the factory LOWER CONTROL ARM eccentric adjusting bolt has a TOTAL adjustment of ONE DEGREE. Thank You SO MUCH for your and every ones help thus far. Red 2010 Camaro Last edited by Red 2010 Camaro; 03-26-2014 at 09:51 AM. Reason: change word |
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03-26-2014, 11:19 AM | #13 |
Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012
Location: Vance Alabama
Posts: 8,014
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That thing is pretty low in the rear, wouldn't drive it around a whole lot. The front bushing on the rear upper control arm is maxed out or close to it and you can damage it.
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03-26-2014, 02:44 PM | #14 | |
Drives: 2011 Camaro SS L99 Join Date: Jan 2012
Location: Perry, GA
Posts: 553
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Quote:
Jeff |
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