Duffy's 1/71 Series 1 240z build - Page 90 - Build Threads - Classic Z Car Club Skip to content

Duffy's 1/71 Series 1 240z build

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  • Author
15 hours ago, w3wilkes said:

Looks like you might have some weather to contend with over the next few days for driving. It would be fun to hear the exhaust note and the sound of those horns breathing. It has been fun watching the build! We played Bonner Ferry and also the course up in Creston when we had a condo in Sandpoint. There's another course we played that's on the road heading east from Sandpoint that was called Hidden Lakes but I think the name has been changed. Oh and there was the afternoon sitting in the "husband" area of the Coldwater Creek store, I was almost thinking my wife got lost in the store.

I wont be drive it till spring. The road chemicals are nasty here.

On 1/5/2026 at 6:03 PM, w3wilkes said:

Looks like you might have some weather to contend with over the next few days for driving. It would be fun to hear the exhaust note and the sound of those horns breathing. It has been fun watching the build! We played Bonner Ferry and also the course up in Creston when we had a condo in Sandpoint. There's another course we played that's on the road heading east from Sandpoint that was called Hidden Lakes but I think the name has been changed. Oh and there was the afternoon sitting in the "husband" area of the Coldwater Creek store, I was almost thinking my wife got lost in the store.

  • 1 month later...
  • 2 weeks later...
  • Author

Well look at this snazzy haltech s3 ecu mount by Galgo! All I can say is wow.

I guess this means it’s time to finish my wiring from my 750 to my new S3.

This is for the passenger kick panel on a 240z.

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  • 4 weeks later...
  • Author

Finally found some time and finished up the engine bay for my new ITB setup!

Next is finalizing my rat nest or wires. Swapping ecus and adding a few circuits made a mess.

I’m happy with how it’s turning out.

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  • 1 month later...
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  • Author

I finally found some hours to start making the wiring not look like a rats nest.

Instead of fuses and relays, I am using a small PDM. So that complicated things, I am also using a buss plug for 5v sensors and all ground wires.

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  • 4 weeks later...
  • Author

Almost got it done. Such a pain in the as*

I probably should have started over, from my old ecu to this ecu wiring.

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Edited by duffymahoney

  • 3 months later...
  • Author

Why would I put my Haltech R3 in my engine bay?

Well I’m doing the opposite of most people and going with my ecu in my engine bay. My 240z has dealer AC (it’s huge) and I hate having my ecu on my passenger kick panel. I have so little room there and I currently have a 5v short I cannot find. My harness is a mess from multiple ecu changes and wiring changes and it’s time to start over.

The R3 is a 4 channel PDM with an internal 150amp fuse. So it can power my injectors, coils and fuel pump and leave me with 1-2 extra circuits for later down the line.

Having it here will allow me to make a sexy harness that is fully serviceable and the whole thing will basically drop in.

The mount will be getting cnc cut this week. The goal is a no holes drilled mount and no holes drilled in my car install, using a Braille battery. It will attach with dual J/V bolts.

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  • Author
12 hours ago, Patcon said:

How does power feed out to the rest of the car?

What do you mean? Stock Datsun harness is uncut and still there, it will attach to the battery normally.

  • Author
38 minutes ago, Mike said:

I don't have any experience putting an ECU into a Z but the position of that unit on the battery is a very good idea! It keeps the engine bay very clean.

Congrats on that backet, maybe build a few more and put them up for sale.

I am pretty happy with it. Should make ITB or EFI conversions easy and much easier to wire.

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