Etb Gauges

[deano266]

Hi guys. Just installed a on etb set of dials. Everything works fine apart from the rev counter and speedo. Upto about 2500 revs the rev counter is fine but then it bounces all over the play (connected to negative terminal of coil pack. Also after about 85mph on the speedo I get the same (connected up using the rev magnetic sender sensing the propshaft bolts).

 

Is this normal or have i fone something wrong when setting them up?

[Guest peter2b2002]

might be your coil playing up if that where the Rev gets its signal on the speedo how many magnets have you got I had 4 on mine

peter-2b

[deano266]

the speedo is taking its signal from the bolt heads. Does it work better with magnets as the instructions said the recommended method was for that. Is there anything that i can do with the coil pack to stop it from messing about or could it mean the coil is on it's way out as it seems good and is delivering a good spark to the plugs

[maccavvy]

Good earth's on gauges and engine and frame.. mine didn't have a good chassis and engine earth and some of my gauges weren't very accurate to say the least

[Guest peter2b2002]

I had no luck using bolt heads I stuck 4 magnets onto the off side 1/2 shaft near the dif with the pick up mounted on a bracket bolted to the dif

peter-2b

[MarkBzero]

I used a single magnet on diff flange. Works OK.

[Guest samss]

I don't know about etb, but on my aftermarket speedo I used a sensor that was supplied and it only went to a set speed before erratic readings, i used a camshaft (hall effect) sensor from a scrappy in the end, had to make a right emergency SVA bodge of a cigarette lighter usb socket to get the 5v for it. I can't remember if that even solved the problem, but i did fit magnets (araldited i think) think i did a pair on opposite bolt heads on diff flange and moved sensor across a bit and it was faultless after that. so magnets may be the answer.

 

I assume camshafts aren't magnetised, but I wonder if the distance tolerance is more accurate or is it down to the grade of steel used. hmm maybe its the size of the bolt heads or proximity of the steel flange that doesn't give it the clear cut difference. who knows!

[cb750]

I've had no problem with telemetrix speedo and sensor picking up from bolt heads but I made sure the sensor bracket didn't move and was bolted to the diff so any diff movement moved the sensor as well. I also made sure that the sides of the bolt heads were all aligned with the sensor to keep the air gap constant.

[fry61]

Our Smiths Flight gauges needed the rev counter pick-up to be very close to the diff bolts --- readings were/are still steady; after tightening the bolts the sensor was adjusted to be 1mm or less gap -- if bolt head point instead of flat was nearest that was filed down so all gaps within 1mm.