Speedo calibration

[Huli]

Is there a reliable method to recalibrate the speedo?
Different drive gear?
Mess with cluster?

[invader_star]

bump. I too would be interested in this info! Does your speedo run too fast or too slow huli?

[Movin]

Bigger tires is too slow, and makes fuel economy calculations bite. I don't know of any plastic gears to change the ratio. Even the the aspire is almost the same . There may be some mazda parts that come off of cars with 15 inch wheels, but have not looked into to it, I use a GPS.

[Huli]

Mine is indicating too slow, by about 12%. I am looking into taking the gear off of an aspire and affixing it to my sending unit. May not be the best method.

I hope to hear there is a direct replacement part.

[RhodeStiva]

Would be nice my is to fast 5 mph.

[mikeyjd]

Mine is indicating too slow, by about 12%. I am looking into taking the gear off of an aspire and affixing it to my sending unit. May not be the best method.

I hope to hear there is a direct replacement part.

I'm not sure about replacements but my last festiva also read 12% high vs my gps.

[TorqueEffect]

According to GPS speed, my speedo is running a bit fast, about 3-4MPH fast.

[Huli]

Looks to me this is a universal problem!

Is there anyone who knows a way to adjust the speedometer?

Can it be done in the dash?

Replace the gear in the transmission?

NOS part?

[Mustangman16]

I am also interested in this.

[Micro Mudder]

ill deffently need mine redone after i get my mudder tires on the frount

[Larry Hampton]

AFAIK, there is no solution to this that is easy or economical. I'm searching for the right gears to make a gear reduction box. Basically, I'd cut the housing that bolts to the tranny in half and mount one end to the bottom of the box and the other to the removable top of the box. You could take the box apart and swap out gears to correct for your tire size.

That being said, the easist way would be to change your tire size to correct for a particular speed that you run as just changing tires isn't linear.

[Huli]

Might be easier to find a source for correct pitch plastic gears and just epoxy them on the stock shaft.

I already have a 20T... just not off the old shaft yet. Should be about 10% fix

[Bathtub Tom]

I googled speedo calibration and came up with some results here in the UK, like this: http://www.jdo1.com/Speedometers.html

You'd think there'd be equivalent companies in the US.

[Huli]

Sent them an email with group buy request!!!!

[Huli]

They don't do american cars... as if that matters. Probably more festivas on the road in UK then here