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Old Oct 27, 2005 | 08:28 AM
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From: Sittin on jackstands
Default Speed calculator
does someone have the formula to figure out speed?


I was turning 5700 rpm in 3rd with 3.73's and 31" tires. How fast was I going?
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Old Oct 27, 2005 | 09:43 AM
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I read that it is...Mph = rpm x tire diameter/Gear ratio x 336

which would mean you're doing 140?
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Old Oct 27, 2005 | 09:47 AM
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That can't be right...it has to take in account the trans gearing.

hmmmm....third gear is 1:1 right? If that's right...you were HAULING ***!!!
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Old Oct 27, 2005 | 10:05 AM
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When i typed it into the gear calculator it said you were going 141!
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Old Oct 27, 2005 | 10:47 AM
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What difference if any does it make if the converter is locked or unlocked on the final ratio on the tranny is it 1:1 when locked?
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Old Oct 27, 2005 | 11:11 AM
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Originally Posted by redLS1rado
When i typed it into the gear calculator it said you were going 141!

GAWD DAMN. I didnt think this brick could go nearly that fast. cool. This 6.0 must be bad
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Old Oct 27, 2005 | 11:27 AM
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i've been that fast in my 5.3...... and it was still pullin, stock motor. makes me a happy boy.
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