Its finally in etch prime! Woohoo

[damienengland]

Also worked out another mystery today. I couldn't figure out why the gearbox speed sensor didn't match the loom connector at all. Turns out the loom is from a VS and the speed sensor connector is different to a VR. Good news is that my gearbox shop were happy to swap over the extension hosing so it all matched up. Nice win!

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[damienengland]

Ok, i got the EFI wiring connections worked out, but not so sure what to do with a couple of the outputs yet. Thought i'd update my findings below;

VR Harness ECM pinout update 1.JPG

[Valencia]

You lost me at ECM

[damienengland]

You lost me at ECM

Haha, yeah sorry about that Valencia. As a sparky, this developing bit of the build is very interesting to me and i'm probably going down the rabbit hole a lot with the electrical bits. Should be back to normal stuff soon as i'm racing to get the engine fired up and the body back on the chassis.

[axistr]

Damo there isn't much to configure or wire in. 12v fused battery ECM supply, 12v ignition switched, A/C request to better control your idle, and the standard plug ins for the EFI and fuel pump relays which would still be on your harness. I got Calmaker to burn me a new Memcal. My V8 engine, harness and ECU was from a 1993 VR HSV Clubsport with 4L60E. He switched off the auto and configured it for a manual. The HSVs have a knock sensor so he also set the tune from 185kw to 195kw. I also got him to remove the VATS but in hind side I should have just used a voltage reducer/regulator (12v to 5v output). The ECM needs a 5v signal from the BCM for the ECM to wake up. It will save you heaps of time trying to fit the BCM and key reader to do the job. I could have used the alarm to switch on the voltage regulator or used a hidden switch to further protect the car from theft.

I also got Calmaker to set a thermos fan cut in to 93 deg C. The V8 engines didn't have thermos fans from factory only the V6 and both had A/C condenser fan. I don't remember if Holden configured the fan ECM output from factory or if Calmaker switched it on. I have never used the fan override but its peace of mind knowing its there. I don't have a condenser fan but triggered the two thermos fans to cut in when the compressor clutch cuts in regardless of engine temp.

[damienengland]

Time to move onto new radiator and fans. Spoke with my radiator/AC shop and have decided to stick with a copper brass overhaul of the WB unit rather than going aluminium. Radiator man suggested a new core with 8.5mm tube separation vs the original 12mm and its apparently the equivalent performance of a 5 row radiator, so going to try that out! Also mocked up a set of AU falcon thermo fans and they look like they will be fine with a bit of a nip and tuck. Should have it all back next week hopefully.

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[damienengland]

Ok, so I've got the engine wiring figured out (thanks axistr) and just doing some alterations before i drop it all back on the engine/gearbox. Of note, I decided to cut out the original injector circuits and run new ones along with an additional hall effect sensor wire to the distributor and this should future proof it for a different computer if i want. So instead of having the injector circuits spliced into two common circuits inside the loom, I'm running each injector circuit back to the computer and will common them up there. That way they can be separated in the future if i want to use a sequential injection computer.

For the electrical circuit geeks, couple of pics below.

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[damienengland]

Very very big day today. Will let the pics tell the story...

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[Innuendo]

Indeed!

Like a married and sex all in one photo collage.
Super exciting for you Damien. Long time coming and I wish all the best getting to the finish line.
I also wish you the best getting rid of those horrid alloy wheels.

[damienengland]

Haha! Yes i agree Innuendo, the wheels will be replaced in due course. Thanks for the encouragement. Cheers