Speedometer Calibration?

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May 6, 2003 | 09:46 PM

CarmonColvin

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Joined: Aug 2001

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From: Helena, Al

Speedometer Calibration?

Any clue how to adjust the speedometer of an FC to compensate for lower gears?

I have 4.33 LSD gears I want to put into my street car but I also want the speedometer to be accurate. Does anybody sell adjusting gears for the speedo cable?

May 6, 2003 | 10:00 PM

nashman69g

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From: Metairie, LA near new orleans

just pull the gear out of the tranny on a GTUs or find someone on the forum...see if rotary resurrection has one!!

May 6, 2003 | 10:38 PM

Snrub

Eats, Sleeps, Dreams Rotary

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From: London, Ontario, Canada

Icemark posted this link a while back:
http://members.ij.net/mrmazda/speedo.html

May 7, 2003 | 12:08 AM

Wankel7

Haven't we ALL heard this

Joined: Mar 2001

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From: Indiana

Kinda random....but I saw a GPS speedometer for sale in Sports Car magazine. That would be better then the stock speedo

May 7, 2003 | 02:50 PM

mazdaspeed7

mad scientist

Joined: Feb 2001

Posts: 2,665

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From: Savannah, GA

Buy bigger tires... One of my friends has 245 45 16's with 4.33 gears, and his speedo is dead on.

May 7, 2003 | 03:59 PM

rotary>piston

Rotary Enthusiast

Joined: Jan 2003

Posts: 873

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From: Boulder, CO

yeah, but bigger total wheel/tire diameter cancels out the acceleration benefits of narrower gears.
I'd say just memorize the percent off and drive like that, not worth the effort IMOto change speedo gears.