Automotive ratio calculators & conversion charts.

[CHARGER_FAN]

I found this site that will help answer lots of questions regarding most any automotive mathmatic problem around.
Main site; http://www.csgnetwork.com/automotiveconverters.html

For example:
Ring & pinion ratio
http://www.csgnetwork.com/rnggrpinioncalc.html

CFM calculator
http://www.csgnetwork.com/cfmcalc.html

Compression ratio
http://www.csgnetwork.com/compcalc.html

Tire size-to-engine RPM 
http://www.csgnetwork.com/multirpmtirecalc.html

Time zone calculator 
 http://www.csgnetwork.com/localtimezonecalc.html 

I don't know about you guys, but I'm always trying to find info like this. This is by far the best one-stop-calculating spot I've found yet.