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Bit of an odd one this, and I suspect I'd be better off asking on an Australin classic cars forum, but here goes.

When my Cefiro arrives from Japan, they're going to convert my speedo to MPH, this will be done by attaching a gearbox to the speedo cable and putting a bit of black tape over the K in KM/h, my understanding is that the speedo also does the job of generating the electrical signal for the ECU which means this signal will be wrong.

I'm not too bothered about this since the signal isn't used for much (and it also raises the speed limit in the ECU from 180kmh to 180mph), however I've just bought one of those Defi HUD displays which has preconfigured calibrations for most Japanese cars. Yes it also has a manual calibration mode but the problem with this is if you switch it back to KM/h you have to recalibrate it again which means every time I take the car to Europe I'd have to recalibrate my Defi HUD as that's the only way I'll be getting a KM/h display.

I realise this is a Japanese import forum and nobody in Australia or NZ will need to do this to a Ceffy or a Skyline, but I'm hoping one of you will know someone who has imported a British car that's new enough to use an electronic speedo signal rather than a cable.

Or am I barking up the wrong tree and Ceffy's do not use a speedo cable at all?

  • 4 weeks later...

wouldnt it be easier to have a sticker made that sits over the kph figures and has mph insteaed. It shouldnt be hard to make. You just need to line it up and stick it down. (You know that and 0 km/h = 0m/h, and 100km/h is close enough to 60m/h)

When they went metric in Australia some of the cars had these stickers added by the distributors.

wouldnt it be easier to have a sticker made that sits over the kph figures and has mph insteaed. It shouldnt be hard to make. You just need to line it up and stick it down. (You know that and 0 km/h = 0m/h, and 100km/h is close enough to 60m/h)

When they went metric in Australia some of the cars had these stickers added by the distributors.

The standard way (other than the gearbox method) is to change the faceplate, but it's a pain in the arse job and never looks right afterwards since most of the companies that offer them are aimed at ricers who want white dials and blue LEDs.

I've pretty much solved the problem anyway, going to leave it in Kph and just use the Defi HUD, then going to wait for a cheap Defi link display to turn up on eBay which I can shove in front of the speedo so that I can't see it any more. That way I also don't have to worry about the mileage reading wrong either (though selling it will be fun if I have to convince people it is really in kilometers!)

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