RBT gear ratio calculator | The De Tomaso Forums

jb1490Member

For those that haven't seen it, RBT's website has a really cool gear ratio calculator complete with a graph, and it's printable.

John

Link to the calculator:

http://www.rbttrans.com/Gear%20Ratio/page1.php

Sample print-out

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4/17/103:56 PM

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4nhotrodHe who dies with the most toys is dead

Are those the stock gear ratios in the sample?

larrywMember

The tag on the ZF in #7102 lists 2.23, 1.47, 1.04, .846 and .705 with a 4.22 final.

The calculator shows a .704 for fifth. I guess it probably doesn't make much difference.

It is fun to play with.

jb1490Member

quote:
Are those the stock gear ratios in the sample?

Yes, stock ratios.

Selecting a vehicle will display the stock gear ratios. Enter your tire diameter and shift rpm and click calculate. You can see what affect different tire sizes and different gear ratios have (like a taller 5th gear or ring and pinion). You can also see what your speed should be at a specific rpm.....say 2950 rpm, in any gear.

John

rmccallMember

Cool! According to that,my GT40 will do 217mph in 5th gear at redline! I have been 8000rpm in 4th gear in it.

Ron

jb1490Member

quote:
I have been 8000rpm in 4th gear

That should have been close to 200 mph!

John

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