Speedo Calibration

[ashpilot]

Where can I get my IS300 speedo calibrated to read the actual MPH and not over reading by 10%? and how much would it cost?

thanks

[Monster-Mat]

you cant, there designed to read over

[Tango]

How about re-adjustment using a different tyre... :winky:

http://www.dakota-truck.net/TIRECALC/tirecalc.html

[webbbr]

so all is 200/300 speedo's over read the speed?

[Bazza]

so all is 200/300 speedo's over read the speed?

no

all cars read over, all by different amounts, but all over

[aido]

The only thing I know of that can calibrate the speedo is the Thor box of tricks for converting from KPH to MPH on imports, that can be adjusted to make it read pretty much bang on, as I nearly found out to my mistake

[Dave-Ellen]

I'm told the faster you go the more they overread as well.............good for ones ego

I compare speed with the wifes sat nav to give me an idea of what speed really is 30/40/50/60/70.....on all my cars.....when on 9 points one must be careful

[lee_iceman]

I use my Origin B2 to get the actual speed by GPS.

[Bloodygoodbloke]

I use my Tom tom gps for checking my spead.

Its strange between 50-80 its always 4mph over.