Turn & Burn
Club Member
I’m aware that this subject had been posted before but thought it warranted a 2nd thread.
I’ve been looking at operation of the tacho from an ECU, the standard 240/260 current sensing tacho will not function from an ECU, so I’d got in touch with Chris @Spiyda Ltd as they crop up when you research this.
He said the Z tachometer is a copy of the Smith’s RVI unit (manufactured under licence) as fitted to many British cars and recommended one of their internal boards (£42) as a direct replacement for the existing board inside the tacho.
Fitting involved disassembly of the existing tacho unit, removal of the existing board and making off 5 soldered wires, the board mounts pick up the existing internals.
Testing was a bit tricky and required purchase of a Signal Generator (only £5 off eBay) but after a bit of a learning curve everything was sorted and the tacho is spot on although my needle is a touchy sticky prob due to age. In a car that vibrates and constantly moving rpm I don’t think this will be an issue.
Not fitted in the car yet, but so far I’m pleased with the result.
I’ve been looking at operation of the tacho from an ECU, the standard 240/260 current sensing tacho will not function from an ECU, so I’d got in touch with Chris @Spiyda Ltd as they crop up when you research this.
He said the Z tachometer is a copy of the Smith’s RVI unit (manufactured under licence) as fitted to many British cars and recommended one of their internal boards (£42) as a direct replacement for the existing board inside the tacho.
Fitting involved disassembly of the existing tacho unit, removal of the existing board and making off 5 soldered wires, the board mounts pick up the existing internals.
Testing was a bit tricky and required purchase of a Signal Generator (only £5 off eBay) but after a bit of a learning curve everything was sorted and the tacho is spot on although my needle is a touchy sticky prob due to age. In a car that vibrates and constantly moving rpm I don’t think this will be an issue.
Not fitted in the car yet, but so far I’m pleased with the result.