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  #1  
Old 20-02-2011, 01:22 PM
Jozi Jozi is offline
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Default Diff & Gearbox Ratio, MPG and Tyre size calculators

Diff
Quote:
Originally Posted by eamo View Post
Juust enter diff ratio, wheel size and gearbox rattio

http://www.diffsonline.com/techinfo/...Calculator.xls
MPG
Quote:
Originally Posted by seanmul View Post
http://www.tvr-webmart.co.uk/tvr_info_mpg.asp

any chance the powerful people will lock and sticky this please???
Tire
Quote:
Originally Posted by Torq View Post
Hi Guys,
found this calculator for tyre fitment. Handy for fitting bigger alloys and keeping your speedometer as accurate as possible.

Torq
Quote:
http://www.1010tires.com/tiresizecalculator.asp - allows you to compare standard size tire to up to 4 other tire sizes.
Quote:
http://www.willtheyfit.com - Wheel Fitment, Tyre Stretch, Rolling Radius and Speedometer Error Calculator - also gives Diameter, Poke, Speedo error, Speed reading, Ride height gain, Arch gap loss difference
Quote:
http://www.carbibles.com/tyre_bible_pg4.html - This is something like a tire/wheel bible, lots of info!
Useful diff/gearbox ratios link and speed calculator
Quote:
Originally Posted by liam012 View Post
this came up in another thread but is worth a looky if you didn't see it....
http://www.behindmatrix.com/e30/foto...023/f00023.htm

also if you have these:
320i - 3.72, 2.02, 1.32, 1.00, 0.81 and 3.45 reverse
325i - 3.83, 2.20, 1.40, 1.00, 0.81 and 3.46 reverse
Sport - 3.35, 2.03, 1.36, 1.00, 0.81 and 3.20 reverse.

you can use this:
http://www.unixnerd.demon.co.uk/revs.html
Quote:
Originally Posted by DaveM-sport View Post
http://vlsicad.ucsd.edu/~sharma/Potpourri/perf_est.html

Found this calculator for comparing performance with different gear ratios and diff ratios...

The detail you can add to generate a result is brilliant
Original threads:
Diff thread
MPG thread
Tyre thread
Gearbox speed thread

Last edited by Jozi; 04-06-2014 at 01:13 PM.
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  #2  
Old 18-07-2011, 09:47 PM
Jozi Jozi is offline
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Added another handy tire size calculator
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  #3  
Old 11-03-2012, 03:28 AM
Jozi Jozi is offline
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Added "http://www.willtheyfit.com" a tire size comparison site
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  #4  
Old 04-06-2014, 01:14 PM
Jozi Jozi is offline
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Added another tire related link, this has to be some sort of bible for wheels/tires, lots of info and sciency stuff! http://www.carbibles.com/tyre_bible_pg4.html
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