Jump to content
The mkiv Supra Owners Club

Speedometer reading incorrectly


Guest trickstermusic

Recommended Posts

Guest trickstermusic

Hi guys, new to this supra owning. Ive had my j-spec for a couple of weeks now but the speedo seems to be out. Its got an mph dial, but seems to be showing a higher speed than im actually doing. Ive checked it against a tomtom and a garmin sat nav, one says its 7mph out, the other 8mph. So if the clock says im doing 50mph, im actually doing 43mph. (helpfull for not getting nicked) Are the sat nav readouts reliable? Ive also checked it against a friends supra and its 5mph out to that, so whats right?. The wheels/tyres are 17's with 225/45 tyres. Ive checked a calculator thing against original size and it says it makes 0.36mph different to readout.Can someone help me out here, is it still measuring kph or something else. Anyone know how i can solve this or someone who can put it right somehow?. Rolling road?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.