DET rev counter prob fix (theory)

[umpkin]

can the rev counter on the s12 pick up the signal from one coil pack??? having looked inside my rev counter last night, i see a potentiometer same as what used to be on fords, this was used to change the sensitivity, depending on if it was used on 4 cyl or 6 cyl, so im guessing that you might be able to tune it to 2 cyl, or poss even 1 cyl pending on the spark freq on the det coil.

[30psi]

Yes but it will show 1/4 speed, so you need to bridge the signals from all 4 coilpacks and use diodes to avoid interference. Thats my theory, not been tried though.

[umpkin]

yeah.

but if you alter that potentiometer inside the rev counter, you may get it to read it with higher sensitivity, and may work. obviously i dont have a DET to test on, but worth a try to others that have. like i say its used for changing between 4 and 6 cyl engines, but im sure it goes low enuf for it to read 1cyl engines

[PukkaSilvia]

Theres a signal straight off the s13 ecu for the s13 rpm counter. It works fine on my aftermarket rpm counter but i recon it just doesnt have enough power to move the s12 one lol.

[honest_jim]

if you could get hold of a DET set of clocks you might be able to swap the bit on the back over. It might have an additional power feed on the DET?

[doski]

i got my det to run with my rev counter, all you have to do is run 4 diodes, one off every coil and then join them all together and wire into the one wire for your rev counter and the diodes only costed about a pound from maplins.

cheep and easy fix