Fitting an aftermarket rev counter

An alchemy of sparks, copper wire and earth

Moderators: User administrators, Moderators

Locked
Fin
Registered user
Posts: 314
Joined: 21 Jan 2010, 19:40
80-90 Mem No: 8714
Location: Bradford On Avon
Contact:

Fitting an aftermarket rev counter

Post by Fin »

Thought I'd get one,
Where the bloody hell does the wiring hook up? ie: what wires do I need to attach to where?
What's the rev range of a 1.9 WBX and of a turbo'd wrx scooby
i have the first fitted and the latter is waiting in the shed
Single cab pickup, running 1996 Subaru WRX STI engine, Aiden talbot gearbox.

Fin
Registered user
Posts: 314
Joined: 21 Jan 2010, 19:40
80-90 Mem No: 8714
Location: Bradford On Avon
Contact:

Re: Fitting an aftermarket rev counter

Post by Fin »

got quite a nice rev counter out of an old tractor with a 10 in dial, was gonna run up a swanky pod for it on the lathe
Single cab pickup, running 1996 Subaru WRX STI engine, Aiden talbot gearbox.

User avatar
kevtherev
Registered user
Posts: 18832
Joined: 23 Oct 2005, 20:13
80-90 Mem No: 2264
Location: Country estate Wolverhampton Actually

Re: Fitting an aftermarket rev counter

Post by kevtherev »

Fin
there's a write up in the wiki for fitting one.
But basically you need to run a wire from the coil
an earth and a power wire for the illumination

Image

you can get gauges fro Demon tweeks.. http://www.demon-tweeks.co.uk/Performan ... l_Kits/792
I would recommend the TIM gauge (pictured here)
AGG 2.0L 8V. (Golf GTi MkIII)

User avatar
AngeloEvs
Registered user
Posts: 1345
Joined: 22 Nov 2007, 19:22
80-90 Mem No: 4709
Location: Upwell, Norfolk

Re: Fitting an aftermarket rev counter

Post by AngeloEvs »

You can run a new wire from the coil but you don't need to. A lead from the coil is already at the dashboard (along with all the others you need!) on a van that has a buzzer of doom (and yours being an '89' model will have a BOD). I posted the circuit details in the thread below (click on the diagram to enlarge) with the pin numbers on the edge connector that feeds all your instrumentation. You can tap into these wires at the edge connector for your new tacho - Tacho pulse (9), Illumination (1), Earth (3) and 12V (8) ......if you need the colour codes then let me know! Wether you tap into all of them or just the tacho pulse wire is up to you (and wether you have an aversion to using those compression fittings that some people hate - used appropriately I find them useful)...............


https://club8090.co.uk/forum/viewtopic.php?f=39&t=70384
1987 DG Karisma LPG with remodelled interior

User avatar
kevtherev
Registered user
Posts: 18832
Joined: 23 Oct 2005, 20:13
80-90 Mem No: 2264
Location: Country estate Wolverhampton Actually

Re: Fitting an aftermarket rev counter

Post by kevtherev »

Nice one Angelo.. I guess my post was basic, the BOD is more refined
AGG 2.0L 8V. (Golf GTi MkIII)

User avatar
bigherb
Registered user
Posts: 2581
Joined: 27 Mar 2008, 13:50
80-90 Mem No: 5789
Location: West Kent

Re: Fitting an aftermarket rev counter

Post by bigherb »

If it came out of a tractor then I would assume it was a diesel engine and will be worked by a phase signal from the alternator not an ignition signal. You might need a frequency pulse converter otherwise it will doing 4000 rpm at idle
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow

Fin
Registered user
Posts: 314
Joined: 21 Jan 2010, 19:40
80-90 Mem No: 8714
Location: Bradford On Avon
Contact:

Re: Fitting an aftermarket rev counter

Post by Fin »

Cool - Thanks for the info guys, I'll dig about under the dash
And maybe buy a new rev counter
Single cab pickup, running 1996 Subaru WRX STI engine, Aiden talbot gearbox.

Locked