The Triumph Dolomite Club - Discussion Forum

Bit odd I know, but Im fitting the stock type sensor in the bottom hose where its cooler (once the sat is open) and It'll read low. So instead of getting a proper sensor from Robsport, where can I get one that reads higher? It may not be perfect but if its near half way when up to temp it'll be visually pleasing

Cheers

Tony

There is not much sense in putting the sender in the bottom hose, since it will just read cold till the stat opens. A faulty stat will boil the engine and the guage will STILL be reading cold!
Best to put the sender in the water gallery next to and below the stat (in your case, in the engine backplate) I'd use a capillary type graduated in degrees for accuracy. Then you will KNOW what's going on!

Steve

There is not much sense in putting the sender in the bottom hose, since it will just read cold till the stat opens. A faulty stat will boil the engine and the guage will STILL be reading cold!
Best to put the sender in the water gallery next to and below the stat (in your case, in the engine backplate) I'd use a capillary type graduated in degrees for accuracy. Then you will KNOW what's going on!

Steve

Sorry bout post duplication, snow induced power cuts are playing hob with my computer!

Yes Steve I understand that but for now I want to see the temp from the bottom as I dont want to remove the plate yet. Its just a temporary thing. Not much room left in the head plate at the mo.
So which sensors read high?

Cheers

Tony

The original one I got from ANG reads hot, 3/4 on the gauge at normal operating temperature (measured with a laser thermomiter). The robsport one reads better but still a bit hot. I think that's down to the new voltage stabilizer more than anything.

Thanks James I'll try one of those.

Cheers

Tony

If you MUST have one, the one Rimmers were selling some time ago had a rep for reading high. I believe it was actually the part number for a series Landrover.

Steve

Another way of getting the water temp; gauge to read higher would be to swap the 10V nominal stabiliser for a 12V electronic one. ( 7812 from Maplins ) would probably be O.K. except the voltage overhead at 13.5V input is a bit low. The trouble is the fuel gauge will read high as well.
To give you an idea of what the gauge increase in reading would be it would typically rise from 1/2 way to about 3/4. Here is a part of the article I wrote on it recently.
HTH,
Tony.

i did think of your excellent post Tony, but the fuel gauge being higher would give me false happiness

Cheers

Tony

Then fit one behind the temp gauge just for that gauge.

Jeroen.

Yes thats an option too. For a tenner I'll try a rimmers sender first.

Cheers

Tony

soe8m wrote: ↑Mon Dec 11, 2017 9:43 pm Then fit one behind the temp gauge just for that gauge.

Jeroen.

Yeah, they're cheap as chips (sorry couldn't resist).

'Car builder solutions' may do a adjustable one.

You could also consider Gallaleo's soution of putting a shunt resistor in parrallel with the sender, i.e. down to ground.

The problem with that is it changes the linearity of the guage a bit - it will have more effect at the lower end of the scale than at the top. So, it will move the reading up, but compress the normal range into the higher region of the guage.

The advantage is, given you can solder a couple of wires with lucar connectors onto a potentiometer (about 5 kOhm sounds right), it's cheap, don't affect the fuel gauge, and fully adjustable to give the reading you want at normal running temp.

Graham

cheers Graham, I ve got a rimmers one to try for now. Once Im ready for the ecu to be fitted I'll have another sensor dedicated to the ecu so at least the ecu will know whats going on

Cheers

Tony