Junkyardbear Posted November 30, 2017 Posted November 30, 2017 The speedo in my zed convertible is in kph but has been converted to mph mechanically if that makes sence as it uses the same Speedo from factory but my car measures in mph . The thing is people pass me when Iam doing 60 "mph" in a 60 zone ive tryed doing 100 kph (60mph) using the Speedo but its to fast so I've downloaded a really good app that's confirmed my Speedo is 10 mph off so 60 is 50 and so on. I've confirmed this doing 40 in a 30 zone and the trafic calming sign said I was doing 30 mph. Any thoughts? wheels sizes and tyres are correct. Thanks Allen. Quote
coldel Posted November 30, 2017 Posted November 30, 2017 The speedo is converted using a box which intercepts the signal before it hits the speedo. All imports generally have these. They are however quite variable in how accurate they are. Best thing is download a GPS app on your phone which measures speed and go on a few roads where you can do a constant speed without interruption and look at the difference between speedo and app. My speedo over-reads by about 3mph'ish. Quote
Junkyardbear Posted November 30, 2017 Author Posted November 30, 2017 Thanks I did that earlier the app is really good and near perfect timed with the Speedo mine is 100% 10 mph faster. I can live with that just got to remember this when driving the BMW 330 sport vert lol. Only 40mph is 30 mph in the Zeddy : ) Quote
coldel Posted November 30, 2017 Posted November 30, 2017 There was a cheat on my celica where you lifted the speed needle over the zero pin so it's under it not resting on it then you start the car. It does a speedo calibration every start so once the car is running lift speedo needle back over the pin so it rests back on top. It got me to within a few miles per hour accuracy. Quote
Junkyardbear Posted November 30, 2017 Author Posted November 30, 2017 Thanks I did that earlier the app is really good and near perfect timed with the Speedo mine is 100% 10 mph faster. I can live with that just got to remember this when driving the BMW 330 sport vert lol. Only 40mph is 30 mph in the Zeddy : ) Quote
Junkyardbear Posted November 30, 2017 Author Posted November 30, 2017 32 minutes ago, coldel said: There was a cheat on my celica where you lifted the speed needle over the zero pin so it's under it not resting on it then you start the car. It does a speedo calibration every start so once the car is running lift speedo needle back over the pin so it rests back on top. It got me to within a few miles per hour accuracy. I break things when it comes to sensitive handling lol Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.