mk2 rev counter problem, 1.8t bam

hi all,

on my rallye, i'm running a late spec 1.8t bam engine. It's running all the oem ecu and what not. The problem I've had with it is I cannot get the rev counter to work. I can get it working on late spec corrado clocks, but as far as I'm aware the signal to mk3/corrado clocks are different than mk2.

I have tried using a black box which you get from jabba and I ordered a more advanced one which allows you to set some settings to convert up to 12 cyls into 4 cyl clocks. This does work, but doesn't work on mk2 clocks still.. Vince at stealth told me to get it.

http://www.bakerelectronix.com/products_tsd


What should I do ...

 

hold on.... i`ll take a look tomorrow i have a box of tricks that drives mine.

originally i had problems with mine too, turns out it needed a better earth and live to prevent overheating. all thats inside is a coil and 3 pin diode

 

thanks bud

 

http://clubgti.com/forum/showthread.php?t=213773
maybe of help?

 

this is from QPeng, the transformer is a 35:10.5 ratio its very important the metal tab on the diode does not touch anything.standard part number is BD243C
show here
top pin 1 Ecu signal
pin 2 coil black
pin 3 Earth

coil, show red 12v+ and black wire to diode pin2



coil, showing brown 12v+ and blue to tacho



hope this helps

 

Qpeng said they wont sell just the convertor ... , but Jabbasport said they now make these kits ,?


Jo

 

well thats it ^up there, mine came with the kit i can`t see it being expensive to make all the parts are standard consumables for a leccy.

diodes are under2 from farnell, they also have lots of them, but the vagueness of the info i know doesnt help. i`m still looking

 

seems they are known as "bobbins transformers" they start at 8

 

I've been looking for this information since last summer and its so close to being possible to build but cant find a suitable transformer anywhere since they dont do it by ratio? Has anybody got any more info (even a manufacturer would be handy).

Cheers

 

did anyone get this working??

I still haven't got a working rev counter, have been trying today to do this:

http://www.clubgti.com/forum/showpost.php?p=1928026&postcount=46

but it didnt work..

I guess my next attempt will be above. i did have a qpeng converter wired up, but it didnt work. is above any different?

 

it works correctly?

 

question.... what signal do the mk2 rev counter clocks want to see?

i have an s60 feeding pin 10 on instrument cluster, and scoped its signal output, which is a square wave dc switched output at battery voltage amplitude. rev counter wont work.. its run on an exp48 ecu before and worked, which is odd needless to say.

 

ahhh.. -ve.. doh!
cheers

wondering how the exp48 that was on there before managed to make it work.. ?

 

Another question. What do the original diesel mk2's use for the rev counter signal? no coil so no signal right.

 

Ah ye, just been hunting for info on the diesel forums. not much use without monumental effort... the hunt continues!!

 

I think its more than just a -ve feed.
Its getting that and no workie.. from S60 direct, and also off coil drivers direct.