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Rolling radius?

Old May 16, 2008 | 03:37 PM
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GIdriver's Avatar
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Default Rolling radius?

Does anyone know the rolling radius of the rears? I'm trying to crunch some numbers, and cant find it. Either my info or math is bad. If anyone knows or could measure it would be greatly appreciated.
thanks
 
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Old May 16, 2008 | 03:48 PM
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Default Re: Rolling radius?

Originally Posted by GIdriver
Does anyone know the rolling radius of the rears? I'm trying to crunch some numbers, and cant find it. Either my info or math is bad. If anyone knows or could measure it would be greatly appreciated.
thanks
I think it's 26" and about 800 revolutions a mile.
 
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Old May 16, 2008 | 04:04 PM
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Default Re: Rolling radius?

Ok, im running the math on the SRT 6.

So far....

Drive wheel torque = 2908.187,

Wheel thrust = 2692.737 ?

I need an accurate rolling radius measurement for accurate #s, And all other equations rely on these base numbers.

I tend to do insane research, and I am trying to plan a build from iraq, (royal pain)
any help here would be great.
 
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Old May 16, 2008 | 04:04 PM
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Default Re: Rolling radius?

Deleted, NIPR flashed.
 
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Old May 16, 2008 | 04:13 PM
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Default Re: Rolling radius?

What do mean by the rolling radius? how many revolutions per mile?
 
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Old May 16, 2008 | 04:24 PM
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MD SRT6's Avatar
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Default Re: Rolling radius?

Looking at your calculations, I think maybe you mean gear ratio, I believe it is 3:07-1 on the srt6. Hope that helps and be safe over there and thanks for serving
 
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Old May 16, 2008 | 04:24 PM
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GIdriver's Avatar
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Default Re: Rolling radius?

The rolling radius is the vertical measurement from the center of the wheel to the tire's point of contact on the ground. I have to equate for the weight of the vehicle as it slightly compresses and flattens the tire on the contact patch. Its a minimal value, but its pertanent in the equations.
 
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Old May 16, 2008 | 04:28 PM
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MD SRT6's Avatar
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Default Re: Rolling radius?

You lost me! Have fun.
 
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Old May 16, 2008 | 04:28 PM
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Default Re: Rolling radius?

Wouldn't it be dfferent depending on the tire.
 
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Old May 16, 2008 | 04:30 PM
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GIdriver's Avatar
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Default Re: Rolling radius?

Originally Posted by MD SRT6
Looking at your calculations, I think maybe you mean gear ratio, I believe it is 3:07-1 on the srt6. Hope that helps and be safe over there and thanks for serving
I have the ratios, I just need to confirm my numbers on the wheel thrust. Do the numbers look accurate to you? Been working 18 hours and my minds not as sharp as it should be. Right now coffee equals conciousness.
 
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Old May 16, 2008 | 04:38 PM
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Default Re: Rolling radius?

Originally Posted by robby363
Wouldn't it be dfferent depending on the tire.
I'm basing all equations on factory specs.
 
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Old May 16, 2008 | 04:57 PM
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Default Re: Rolling radius?

25" top to bottom, so 12.5" is what you are looking at roughly, thanks for your service...by the way, Doc
 
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Old May 16, 2008 | 05:00 PM
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Default Re: Rolling radius?

Thank you Doc, an I'm proud to serve. i will post all my numbers once ive finished.
 
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