I have been meaning to ask this for some years but am a lazy git. My S6 still has its (gold faced) km/h clocks. No-one made mph faces that matched when I bought her from Sudesh in 2011 so I did a bit of research and didn't bother.

 

On my first Z, I just changed dial faces and it was fine. On a 2nd Z, I fitted a km/h > mph converter but something didn't feel quite right in the power steering. I did a bit of research and came to the conclusion that no-one I asked knew exactly where the clocks and ECU picked up the speed of the vehicle from and what the 9/5 pulse conversion done by the converter would actually do - would it correct all systems or leave the clocks reading in miles while the psu thought it was driving in km. (Plus there is the clocking issue which I would trust JeffTT on but not many others.)

 

Plus I have read so many posts here about issues of one sort or another involving clock changes or converters or steering issues etc that I now pose the question why does anyone bother?

 

The MOT just says it should have a fitted and working speedometer. Not whether it read km/h or mph http://www.ukmot.com/mot%20manual/index.asp?MOT_Section=Speedometer&MOT_Number=6.7 and http://www.theaa.com/motoring_advice/car-servicing-repair/mot-changes-2012.html - furlongs per fortnight would pass MOT.

 

The Vehicle Construction and Use Regs say: http://www.legislation.gov.uk/uksi/1986/1078/made

"every motor vehicle shall be fitted with a speedometer which, if the vehicle is first used on or after 1st April 1984, shall be capable of indicating speed in both miles per hour and kilometres per hour, either simultaneously or, by the operation of a switch, separately. "

 

1) My mobile phone (or satnav) if it is in a holder in the car is "fitted" and complies with VC&U Regs.

2) My km/h OEM speedo complies with MOT

 

If I want to be super pedantic, I could buy and fit one of these http://furoreproducts.co.uk/digital-speedos/197-hud-speedo-driving-school-secondary-speedo-simple-3-wire-fitting.html (£70 and gives HUD).

 

Or indeed, as I have done, one of these http://www.ecutalk.com/default.aspx which for my £140 gave me a USB Consult interface as well a lot of other functionality (error codes, realtime sensors etc etc)

 

No issues with first UK registration on import in 2011 and no issues with every MOT since (touch wood).

 

So what have I missed? Why do you need UK clocks and the hassle that (apparently) comes with them?

I assume it is, providing you have a suitable donor to get the plugs from and the wiring colours for both types (I don't know if they changed the colours for Series 4, I wouldn't put it past them! ). Interested to hear if anybody out there has tried this route

I assume it is, providing you have a suitable donor to get the plugs from and the wiring colours for both types (I don't know if they changed the colours for Series 4, I wouldn't put it past them! ). Interested to hear if anybody out there has tried this route

 

This might help you guys with your low-rent newer models. ;)

 

http://www.300zx.co.uk/forums/showthread.php?166978

"Low rent"? I like to think of it as an exclusive (if slightly dysfunctional) club... ;)

 

Thanks for the link, will definitely be bookmarking that one for future reference!

Surely what is needed is a regular speed converter/delimiter to adjust the instrument cluster from kph to mph. Divides the signal by 2/3 to convert.

Then another one working the opposite way around wired into the output from the instrument cluster that is sent to the ecu.

 

The ecu would be in effect receiving the original speed signal. Only the cluster would be displaying mph.

 

 

Surprised there doesn't seem to be a solution given how many 95+ cars there are

Looks like this is the ultimate solution to wire a converter into a 95+ kph speedo

 

Wiring it directly to the circuit board of the speedo drive assembly as he shows, allows it to adjust the needle speed to get mph, but leave the onwards signal to the ecu unaffected thus keeping the hicas & pas working at the correct speeds.

Chipped ecu to remove the jspec speed limiter.

 

 

Maybe its also possible to to take a mph speedo needle & motor assembly and swap that into a jdm cluster...

That second photo looks fantastic apart from chrome rings and LEDs etc. Maybe I'm just getting old lol but second pic looks great.

 

For me, apart from the technical reasons, I just think they look loads better (fully), on the second zed I bought, it had these EL dials, I had some normal jap clocks lying around so I've changed them for UK ones:

 

 

That second photo looks fantastic apart from chrome rings and LEDs etc. Maybe I'm just getting old lol but second pic looks great.

 

LED's? I'm a fan of the rings to be honest, Have them in both cars now

I am a fan of the rings, but considering removing them when I revert back to a stock wheel.

I chose to put a delimiter on my imported TT.

I cut the track & was done with one drop of solder.

Not a messy job Lexx.

Not everyone's choice but at least have the odometer

reading as with all import documentation & MOTs

Art213