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Calculators for Stuff !

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Old Jan 16, 2005 | 09:01 PM
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DAVID GRIMES's Avatar
DAVID GRIMES
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How About A Cup Of STFU
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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
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Old Jan 17, 2005 | 03:03 AM
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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.
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Old Jan 17, 2005 | 08:50 AM
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DAVID GRIMES's Avatar
DAVID GRIMES
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Thanks !
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Old Jan 17, 2005 | 10:24 AM
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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.
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Old Jan 17, 2005 | 01:37 PM
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The bumper change from 80-81 reduced the drag coefficient... can't remember the numbers

Jon
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Old Jan 17, 2005 | 02:13 PM
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a .2 cd change with the new bumpers
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Old Jan 17, 2005 | 02:15 PM
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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.
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Old Jan 17, 2005 | 09:46 PM
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a .2 change?

do you mean .02?
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