Speedo calibration

[redline_13000]

anyone know where i can get this done? i just got bigger tires...about 2.5 inches bigger..anyone know how much my speedo is gona be off? is it even worth it to get it calibrated?

[Illusionsir]

im not sure what kind of difference it will make to the accuracy of your speedo, but if your not sure and wanna get it check out i recommend Mr.Speedometer. you can look them up in the phone book, they deal with just speedo's!

[ninspeed]

yep mr. speedometer.. i think is about 140$

[ramminghard]

you could buy a hypertech power programmer 3 and that will do it. it can also change shift points and take away the speed limiter.

[GTS Jeff]

Originally posted by ninspeed
yep mr. speedometer.. i think is about 140$

i thought 50?

[Weapon_R]

50 for a speedo check - not calibration.

Post your old tire size and new one - that way, I can find out the difference in speed. Usually its very very minimal.

[ninspeed]

does anybody have the link to the tire size caculator on a miata fourm? (i hate doinging all the math)

[FiveFreshFish]

Originally posted by ninspeed
does anybody have the link to the tire size caculator on a miata fourm? (i hate doinging all the math)

First thing Google turned up.

[4wheeldrift]

Originally posted by Weapon_R
50 for a speedo check - not calibration.

Post your old tire size and new one - that way, I can find out the difference in speed. Usually its very very minimal.

The difference on 4X4s tends to be a lot bigger, because it generally isn't a couple millimeters of rolling diameter being added with bigger wheels, its a couple of centimeters or more.