Calculators for Stuff !
 

Tire size Comparator
http://www.miata.net/garage/tirecalc.html

Wheel Offset
http://toy4two.home.mindspring.com/offset.html

Speed/RPM
http://www.car-videos.com/tools/spee...B1=Recalculate

Gear Ratio Speed Calculator
http://www.davewin.com/tech/gear_ratios.shtml

Horsepower & Aero Drag Calculator ( requires drag coefficient which I have never been able to find )
http://www.davewin.com/tech/horsepower_calc.shtml

Hope these help somebody :)

Just so you know, the drag coefficient for most FB's is .29 It's probably a bit higher or lower for some models, but that's close enough.

Thanks !

In case anyone is wondering....

Tranny gear ratios:

1st- 3.67
2nd- 2.22
3rd- 1.43
4th- 1.00
5th- .83

At least for an 81 GSL.

The bumper change from 80-81 reduced the drag coefficient... can't remember the numbers

Jon

a .2 cd change with the new bumpers

Some info that might go well with the calculators:

http://members.ij.net/mrmazda/tranchrt.txt

http://members.ij.net/mrmazda/tirechrt.htm

All courtesy of Felix Miata of http://members.ij.net/mrmazda/main.html.

a .2 change?

do you mean .02?