DTA S40 and Mk2 Rev counter

Guys, I would expect the diode workaround to work with coil packs w/external ignitors, with the Sagem/Reno/Pug/DTA kit units being an example of units that are externally amplified, Diagrams similar to sparrow's have been put here.

However with VW amplified COPs you need the ecu to generate the tach signal ( low amplified signal) and then amplify to suit the vehicle cluster.

 

coil packs & leads over COP any day for me until they get reliable

 

I completely agree. The 4 pole things seem to have an edge when it comes to that.

 

going to try the new tfsi coils when i get a mo... so say more poke to them.. will see I guess

 

Let us know your findings

 

will do..

 

Is there an off the shelf solution available for this?
I want to incorporate an DTA S60 with my mk1 golf rev counter (tittendash)
As the pictures don't work anymore I am not sure what to do.

 

I will point sparrow to this. I believe he does.

 

I'll sort the pictures shortly.
There is a guy on the CGTi Facebook page that makes adapters as well.

 

James E looms

 

Pictures fixed. Shout if you have any questions.

 

Thanks, just for info on this thread: the tacho output on the ecu is a 12v square wave.

 

James E Looms has a converter which takes a 5v negative pulse to a 12v negative pulse.
As I thought the output from DTA was also 5v this probably would have worked (?).

But as the tacho-output from DTA is 12v wouldn't this just work directly on the mk1 tacho?
Has the tacho-output form DTA changed over the years from 5v to 12v?
I haven't got my engine installed yet so cannot test it yet.

 

Reviving an old thread for updated reference.
The ones which James had were originally supplied by myself for the VW OEM ECU's i.e Mk4 platform and pre can bus. I also supply a similiar tach fix for standalone ECUS. DTA, MS, OMEX etc. If required please message me on @dubs.n.diy on instagram.
https://photos.google.com/album/AF1.../AF1QipNoRpSJtPwt7emSlNDCFAOhNJw_tA6vyRTIhWgW

 

The other funny thing is, the OP is now the owner of DTA!

 

Browsing the forum (newbe) and checking this section, I stumbled upon this too.

The old tachos are fed by the coil signal, which is quite a high voltage. I reccon there is a filter in the meter itself, but I didn't dare to open it up further.
Non-OEMs supply a 5 or 12 Volt signal, usually a block type signal, but the tacho does not react on that.
I found people who sell amplifiers for quite some money, so I made an amplifier myself and it worked

I already sold 3, one of them is supplying @knarfmk1 's tacho with the correct signal! So if you need one, contact me. I can make them for little money, and since it's standard mailbox-size post it shouldn't be really expensive to ship to the UK.

 

No not the speedo, just the signal amplifier. £30 is a lot cheaper than I could find: € 75,-!!
That's why I made it myself, for a lot less

 

Exactly, if you see how fragile the meter is built (the filter is on the meter itself), you don't want to mess with that.
It's easier to literally add 5 parts to boost the signal