S12 ca18det brief pointers

[30psi]

I did it by tapping in to each ground wire that went to each coil and collated them together via the diodes to have the combined signal. Instead of tapping this in to the back of the instrument panel I used the original signal wire from the earth of the original coil. This was on a Datsun by the way but the principal should still be the same. On the S12 I think its the blue wire going to the coil that feeds the instrument, but check.

[paulsilv]

Got the Temp Gauge wired in and working like a dream

But I am stuck on the Tacho wiring.

Wired the 4 Diodes together with the stripe toward the Tacho


An here again from slightly further away showing the 4 seperate wires to be spliced into the coil packs


This is the plug that plugs into the Ignitor with 4 wires coming off it
Fig 1.


If you follow these wires through the loom they eventually end up at this plug. You can see them entering on the left hand side
Fig 2.


And again the same plug closer up
Fig 3.


These wires then come out of the other side of the plug in different colours (As Below) Which are the correct ones to splice into????
Fig 4.


I am completely lost trying to find the original blue signal wire from the original coil. Do I cut and join or Splice ??? Where is this???

If I dont use this original blue signal wire, is it the light green wire I should be using behind Tacho???


.

[Sharas]

Originally Posted by Pukkasilvia

same s12 engine mounts in exactly the same location.No mods needed

Now i have a little problem here.
Obviously as my s12 was fj20, the engine mounts are different and dont realy fit that well.
So i got my self a couple of s13 engine mounts, but they dont fit the travers (or whatever you call that thing that they bolt to). So now the milion dollar question: are the mounts different and do not bolt up (so i just need a couple of s12 mounts) or is the travers (or whatever it is called) different on the fj and ca cars? Anybody knows?

[30psi]

I used S13 mounts on an S12 subframe, but I used the S13 brackets (which are required to match the mounts). Benefit of S13 brackets is they bolt to the block via 3 bolts per side (not 2 like on the S12).

Thats all well and good, and you can mount the engine BUT I would like to point out a potential flaw.

I can not tell you if the engine will sit at a different height or not. Whilst this sounds trivial it may effect the angles on the prop shaft and therefore you could experience vibrations due to larger angles on the UJ's. It may be fine (in fact the difference is probably minimal) but I have to point this out as you could find youself with a problem.

I didn't have a problem as I was independantly setting the height of the engine, box and setting the angles up on the Datsun anyway. Only reason I used S13 mounts was coz I wanted to fit nice solid nismo mounts.

[s13eater]

the fj20 mounts are oblong and about 47mm with the engine sat on them.

[Sharas]

I am using the s13 brackets, because they came with the engine, so i never even checked if my fj brackets would fit (i just asumed they wouldn't).
Now the thing is that the s13 mounts dont just bolt to the subframe (thats the thing that i was refering to as "travers" ). Seems that i would need to drill a little hole in the subframe, for the little thing that aligns the mount (its closer to the bolt then on the fj mount).
If the left and right mounts are different in this aspect i might have to of the same side. Ill look into this today, maybe make some pic's to make it all clear.

[doski]

When i fitted my det on the mounts i cut the little locater off my nismo mounts

[30psi]

Just rotate the mount 90 deg's, the dimple is supposed to sit in the same slot that the bolt goes into. I would also recommend not tightening them up until you got the engine in place as you get a degree of flexibility from where they can move up and down in the slot

[bigdaves12]

quick question, can i do a det conversion using a loom and ecu from a auto s13 into my manual s12?

or must it be a manual s13 it comes from

[paulsilv]

Not sure on this one. Don't know if there are any differences.

I grabbed everything from a manual.

Maybe the S13 Manual may give any differences, you can find them free online if you do a search.