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03-16-2008, 09:43 PM
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#1 |
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Registered User
Join Date: Jan 2008
Location: Fort Campbell KY
Posts: 271
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gear ratio calculator
Is there anyware I can find a calculator to find out what my final drive ratio is?ie if I have 3:08 and 18 inch rims my ratio is blah blah.
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03-16-2008, 11:23 PM
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#2 |
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Registered User
Join Date: Feb 2003
Location: Northern Germany,near Bremen
Posts: 684
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Re: gear ratio calculator
Try 73-87.com.Its the great site from boardmember bigblock73 (friends call him Jeff)!YouŽll find all kinds of usefull stuff around the squarebodies!
Moneyeater
__________________
My little US vehicle parts business: http://www.thegearheaddepot.com/ Come have a look!  Ž81 GMC C 10, Spanish Red |
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03-17-2008, 12:25 AM
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#3 |
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Registered User
Join Date: Mar 2007
Location: st louis,mo
Posts: 313
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Re: gear ratio calculator
__________________
'79' shortbed |
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03-17-2008, 04:12 AM
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#4 |
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Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: gear ratio calculator
You want to know the gear ratio.
You will need to know the diameter of the tires, the type of tranny output ratio (OD will be approx. .70 a NON OD will be 1.0) take the problem and do this calculation RPM X Tire Diameter (Divided by) MPH X Trans Output ration X 336 = Gear ratio. Example: 2500 RPM X 29" tire = 72500 70 MPH X 1.0 X 336 = 23520 72500 divided by 23520 = 3.08 gear ratio |
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