How do I convert Minutes to tenths of a degree?
I just had a revelation about my alignment. I am using SMART strings to align my car and the chart documents 10ths of a degree while Porsche uses minutes.
Factory GT3 rear toe is 0 degrees 10 minutes + 5 minutes/-0 minutes (per side). I need to convert this into 10ths of a degree to use the SMART strings chart. I'm no math wiz but here it goes: 60 minutes in 1 degree so 10/60 = .1667 +5 minutes would be 15/60 or .25 So rear toe in would be .1667 to .25. Using the SMART strings chart and a measured wheel diameter of 19" I should be 3/64ths to 6/64ths of an inch. Right? |
Sounds right to me. I used to setup my GT3 with 3/32s toe-in on each side. Was very stable & didn't chew up the rear tires.
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Originally Posted by Larry Herman
(Post 6450107)
Sounds right to me. I used to setup my GT3 with 3/32s toe-in on each side. Was very stable & didn't chew up the rear tires.
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Too little rear toe will also make the car wag its tail under hard braking.
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For a second I though I was posting over on the long range shooting boards... (Minutes or MOA are what we use to factor wind/elevation, etc.) Looks correct to me, although I'm used to going from Minutes to Mils and vice versa.
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Download Convert.exe (yes, it's safe for downloading).
Very handy utility to have on your PC. http://wscope.com/convert.htm |
Thanks Lewis. I had something like that on my old iMac, and always wanted one for my PCs.
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Bill you better check your units and see if you are supposed to be using metric degrees or not.
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Originally Posted by mglobe
(Post 6450392)
Bill you better check your units and see if you are supposed to be using metric degrees or not.
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Hey Bill, I have a few metric adjustable wrenches for sale if you need any. :D
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on a 19" diameter, you can take the inches off parallel, and divide by the 19" diameter. just use a calculator and take that number and hit the INV TAN function. .5" is about 1.5degrees as you might find by looking at camber.
1/8" on toe, .125/19" Then use INV TAN, you will get .37 degrees or 22mins |
Originally Posted by Larry Herman
(Post 6450624)
Hey Bill, I have a few metric adjustable wrenches for sale if you need any. :D
I'm saving up for some "L" bracket. All I have left are brackets shaped like "7's". |
Originally Posted by mark kibort
(Post 6450672)
on a 19" diameter, you can take the inches off parallel, and divide by the 19" diameter. just use a calculator and take that number and hit the INV TAN function. .5" is about 1.5degrees as you might find by looking at camber.
1/8" on toe, .125/19" Then use INV TAN, you will get .37 degrees or 22mins Mark, thanks for the info. My brain hurt after reading that. Two glasses of Scotch and now I feel mutch butter. Camp't understnf whatcha' talkin bout. :cheers: |
Originally Posted by trackjunky
(Post 6452849)
I'm saving up for some "L" bracket. All I have left are brackets shaped like "7's".
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Originally Posted by trackjunky
(Post 6450094)
I just had a revelation about my alignment. I am using SMART strings to align my car and the chart documents 10ths of a degree while Porsche uses minutes.
Factory GT3 rear toe is 0 degrees 10 minutes + 5 minutes/-0 minutes (per side). I need to convert this into 10ths of a degree to use the SMART strings chart. I'm no math wiz but here it goes: 60 minutes in 1 degree so 10/60 = .1667 +5 minutes would be 15/60 or .25 So rear toe in would be .1667 to .25. Using the SMART strings chart and a measured wheel diameter of 19" I should be 3/64ths to 6/64ths of an inch. Right? |
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