9 replies to this topic

[miniboo]

I have a set of smiths clocks that is in KM/H and a set of nippon clocks with MPH on that i need for out here.

anyway i plugged the nippon clocks in and they only show the tank as being half full and possibly the temo gauge is readuing half what it should aswell.

on the smiths gauges there is the silver resistor or volts regulator(not sure what)

now is there a simple mod i can do to the nippon clocks to get them to read right or should i do what i am thinking and mod the smiths setup so i can fit just the nippon speedo part into it. I dont really want to do this as it means butchering the smiths moulding and also one gauge will be black an dthe other grey.

[Udo]

I have a big box of "spares" for the smiths type I'll have a look if I have a MPH outer/inner ring if it helps, do you need it to go to 90 or 120!

I did a similar swap froom smiths to nippon oones and my gauges worked fine without touching anything

[miniboo]

not sure if the dial face thing will help as it is an aussie speedo with a weird 820tpkm but i guess it wonr hurt to try it. the Km/h face goes upto 160 so whatever that is. i think it will be 120?

hold on with a bit of maths i should be able to work out what 820 tpkm converts into for tpm shouldnt i?

[Udo]

You should be able to yes but its late and my maths is letting me down at this moment in time

I'll have a look anyway

[miniboo]

so is mine i cant get it to work lol

EDIT: ooo i think i have it. i think it works out at 1320 tpm

[miniboo]

http://www.theminifo...ppon temp gauge

just found this where i asked about tpm before and guessworks even did the maths aswell DOH

[Udo]

divide by 5 times by 8 gets 1312 so somewhere close!

[Dan]

I believe your problem is the senders. Australian Minis have always had locally produced electrical systems, even when they were built as TKD cars. So the gauges and senders worked on different values for resistance than the British built cars. Try checking the resistance of your senders at different fuel and temp levels to see if they are the same as the values we would expect to find on our cars (DK knows the correct values, I don't). If that's the problem then simply swapping the senders will fix it.


by the way, for the face swap the TPM / TPKM won't matter at all so long as the needle moves the same amount of degrees for the same speed. Check that the miles on the new face would line up with where the equivalent KM marks are and if 25 mph is at the same clock position (sweep angle) as 40 Kmh and 50 mph is at the same position as 80 Kmh it will be fine.

160 Kmh is 100 mph.

Edited by Dan, 15 February 2008 - 12:21 PM.

[miniboo]

Thanks Dan.

i will look into the senders. does that mean that the Smiths clocks will be setup to accept different level signals?

[Dan]

Yes, the Australian clocks will expect a certain resistance to show a full tank or hot engine and the Nippon gauges (or any gauges made for a different spec car) will be designed for a different value. That means the senders can not be compatible with both types, only with one or the other.