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Post by JMM » Tue Mar 25, 2008 2:54 pm

Tire Size Calc. -(

Crawl Ratio - (

Tire Size Change Calc. - (

Poor Mans Dyno - (

Convert Liters to Cubic Inch - (

20 degree RTI calc. - (

If you need to convert an RTI score to see what your score would be on another degree ramp you can use this exquation. divide sin(degree° of original ramp) by sin(degree° of desired ramp) to get your converted RTI score.

Here is the equation for calculating your RTI score:

(distance up ramp)
-------------------------- X 1000 = RTI score
(wheelbase of vehicle)

Last edited by JMM on Tue Mar 25, 2008 3:04 pm, edited 2 times in total.
Reason: added new calculators!

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Re: Calculators

Post by LS1Jeeper » Tue Mar 25, 2008 3:50 pm

4 Link Calculator


Gear Ratio and Crawl Ratio (a lot more options than the one you posted)

Gear and Crawl Ratio

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Re: Calculators

Post by suzukirider08 » Wed Dec 10, 2008 9:51 pm

1975 CJ5

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Re: Calculators

Post by dagr8tim » Fri Feb 06, 2009 10:47 pm

For tire size calculators, I like's one. It gives you a graphical indication of the size difference and how much it will throw the speedo off.
1997 XJ Lightly Modified
1998 TJ Full on Mall Crawler

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Re: Calculators

Post by tupton » Sun Feb 08, 2009 12:19 pm

Speedometer Gear Calculator and How To
Tom Upton

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Tube Coping calculator

Post by Vec » Sat Feb 21, 2009 6:13 pm

tube coping calculator.... sweet !

found this gizmo, it will come in handy for building a cage

you can print out the result and make life easy

In case it's not entirely obvious, the point of this thing is to create a cutting pattern for a tube or a pipe to accurately fit it at an angle to another tube or pipe so that you can weld it. This is a whole lot easier than eyeballing the cut and scribing it by hand, and if you do it right, both the grinding and welding are pretty easy. This process is also frequently called "tube notching" or "pipe notching"
En este mundo hay dos tipos
Los de armas cargadas y los que cavan

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