toddk911

I didn't see it on the site.

Anyone have a copy or can tell me which is the RPM wire?

Also, on the DME diagram, there are several RPM pins. Which is the right one?

SamGrant951

Zt-2 pin 3 - green - RPM 0-5V = DME pin 21 solid green 1.0mm

chapstic951

Becareful with the which green wire you cut. On my 86 951, I had two green wires. A thick solid one is shielded, do not use it. Use the smaller green and black one.

See this thread Starting at post #8

SamGrant951

hmm interesting, its been awhile but Ill check which one we used when installing the Zeitronix. Could have sworn it was the solid green. rpm's work!

chapstic951

I should have clarified a bit. Someone chimed in and mentioned you could use the thicker one (which piggy backs to a couple of other pins) but you would damage the shielding and risk throwing off the signal to the other points. Looking at the mechanics manual, the direct tach signal was green/black.

Wish I knew that out of the gate.

SamGrant951

good to know, thanks.

User 41221

Wire 1 (red): connects to DME pin 18 (red/yellow) or other switched 12 volt source
Wire 2 – not used
Wire 3 (green): connects to DME pin 21 (green, RPM signal)
Wire 4 (orange): connects to boost sensor’s green wire
Wire 5 – not used
Wire 6 (yellow) connects to boost sensor’s red wire
Wire 7 (black) connects to DME pin 5 (brown, ground)
Wire 8 (brown) connects to boost sensor’s black wire
Wire 9 – not used
Wire 10 (grey) connects to KLR pin 22 (white/green, TPS)
Wire 11 – not used
Wire 12 (blue) spare input I connected to MAF DME pin 7

Tom M'Guinn

Do copyright notices mean nothing to you people?

User 41221

Sorry Tom! I had filed that away a while back and didn't notate the source at the time. I am happy to give credit where credit is due (um, as long as it doesn't cost me money! lol). That is a handy reference and should have been included with the original instructions.

Regards,

Tom M'Guinn

Just giving you a hard time. Happy it's helpful. (Invoice is in the mail.)

toddk911

Excellent info and it looks like some others can benifit as well!!

Thanks!

special tool

This is corret - you may use either.
but use the smaller green/black one!!!!!!

DLS

quick question

if i only use the o2 sensor and not have the boost sensor then i don´t need to connect wire 8 right?

i should only use
Wire 1 (red): connects to DME pin 18 (red/yellow) or other switched 12 volt source

Wire 3 (green): connects to DME pin 21 (green, RPM signal)

Wire 7 (black) connects to DME pin 5 (brown, ground)

Wire 10 (grey) connects to KLR pin 22 (white/green, TPS)

xsboost90

correct

skene

I'm glad this thread is here, I'm going to be doing the same wiring tonight.

On a somewhat related note, is it absolutely necessary to have the exhaust off the car to have the 02 bung welded on? My only other easily accessible transportation is my bike, and it's not so easy to drive around with an exhaust pipe on that.