• Howdy! we're looking for donations to finish custom knowledgebase software for this forum. Please see our Funding drive thread

jonescg's eCRX pre-build thread!

Will be following this one close. The CRX in that condition (unmodified... riced out...spoiled) is getting very hard to find so the car alone is a great thing to have in 2018. Once it's fully electric it will be a treasure.

Im missing my old hoist...shed. So know how you feel about not wanting to start new projects without the space and gear.

Yeah it might seem like staling, but the reality is I would take just as long, if not longer if I wasn't set up for the job but started anyway.

Batteries are sorted - just have to find a way to make them fit. I can go for range or power. Not sure which is better, but in all reality range will be the main thing I want the CRX for - 200 km at highway speeds is the goal. I reckon these energy dense cells (208 Wh/kg) might be the way to go but the volume they occupy is still pretty big. It won't set the world alight, but 3 C peaks are OK for fun up to 100 km/h.

SloCo - yeah I have been following Arlin's work for ages. And he proves that the Leaf motor can take a lot of abuse. But just in case I can get a complete motor/inverter assembly it would be good to know if I can transplant the whole lot. No big deal otherwise - the PM150DXR inverter will be more than enough for the job. But it would also be good to save about $8000 in inverter spend.
Then look at the work Paul has done to control the Nissan Leaf motor. He sells boards to drive AC and DC motors. You would have to buy the 3 IGBT half bridges needed to get the power to the motor also. But that should be a lot less expensive in total than the $8k for an inverter you quoted.

Here is the driver board:

And the resolver to encoder board:

Here's a video showing Paul controlling the Nissan Leaf motor:

jonescg said:
But it would also be good to save about $8000 in inverter spend.

You should be able to do one of my kits for about 1/2 of this or less.
Arlo1 said:
jonescg said:
But it would also be good to save about $8000 in inverter spend.

You should be able to do one of my kits for about 1/2 of this or less.

I'm sure I can get it cheaper - but not as cheap as a home-brew.
Kurt said:
Im missing my old hoist...shed. So know how you feel about not wanting to start new projects without the space and gear.


It gets installed on Wednesday :D
Oh man this is so good.
CRX on Hoist.jpg

So it turns out the space available isn't as good as I thought. I'll still have to pull the tank out to know for sure, but it looks like some important structural spars are in the way of where I'd like my pack to go.
I can easily fit 6 of my liquid cooled modules in, but 8 would be unlikely. Unless I start to stack two modules on top of the others...
I have shop envy. :bolt:
Well folks, 12 years and 4 pages of posts, I'm finally starting my CRX conversion. The motivation to start it now is bittersweet.

Sweet because I'm finally settled in a nice big workshop, I have a steady job that pays well, and I've got enough DIY EV experience under my belt that I can start with confidence. I also have a spare vehicle on loan so having the car off the road for a year is no big deal. The Leaf motor is in the shed waiting for it's new chassis and I'm happy with my charging options.

Bitter because my wife has more or less dumped me. In 2020 she had a massive anxiety spiral which took her years to recover from, and when she did, she came through without me. Despite my best efforts to keep the flame alive, she's only pushed away harder, so we're going to split up. It's a bit awkward as we're still living together like flatmates (as we have for the past 4 years anyway) but it's clear we're only married on paper. I might not have a workshop for these sorts of things in a years time, so I might as well get this project done while I can.

Anyway, enough country and western song. Time for some pictures:
I wanted to keep the fuel lines in tact in case someone wanted to buy them, so I had to pull the dash apart to access them. I hope to never do that again, so I'm tempted to do a custom dashboard with new wiring to only key services. The heater core was blocked, so it had to come out anyway. Because I still need de-fogging on the windscreen and I want to put aircon back in, I might as well put a PTC electric element in place of the heater core.

The rear engine mount (aka steering subframe) has a big crack in it. It's probably been that way for a decade, but I'll have to patch that up with a welded plate, and paint over it ahead of the inspection. I might be able to find one at a wreckers, but at that point I wonder if a custom frame is better, one complete with Leaf motor pickups instead?


  • 20240309_171311.jpg
    319.3 KB · Views: 23
  • 20240309_171354.jpg
    259.8 KB · Views: 22
  • Crack small.jpg
    Crack small.jpg
    96.8 KB · Views: 18
  • Engine out.jpg
    Engine out.jpg
    163.2 KB · Views: 18
  • Engine out2.jpg
    Engine out2.jpg
    169.7 KB · Views: 18
  • Ian pulls the shafts out.jpg
    Ian pulls the shafts out.jpg
    99.4 KB · Views: 23
  • Two ageing blokes and a honda.jpg
    Two ageing blokes and a honda.jpg
    141.5 KB · Views: 25
Design for the battery is settling...


  • CRX battery cooling plate2.jpg
    CRX battery cooling plate2.jpg
    172.2 KB · Views: 4
  • CRX battery sandwich assembly.jpg
    CRX battery sandwich assembly.jpg
    322.3 KB · Views: 4
  • CRX battery cooling plate.jpg
    CRX battery cooling plate.jpg
    96.6 KB · Views: 4
Identified a massive crack in the rear engine / steering subframe which needs to be replaced. Luckily the aftermarket racing community has solutions. Once this is repaired I can work on mounting the Leaf motor and get some new driveshafts made up.


  • Ball joint separator.jpg
    Ball joint separator.jpg
    128 KB · Views: 10
  • Steering subframe out2.jpg
    Steering subframe out2.jpg
    134.7 KB · Views: 10
  • Steering subframe out.jpg
    Steering subframe out.jpg
    149.8 KB · Views: 10
  • CRX steering subframe FCS Race.PNG
    CRX steering subframe FCS Race.PNG
    536.4 KB · Views: 10
New subframe arrived, so I spent the weekend cleaning up the power steering rack and tack welding the mounts in place.
I won't get it painted up until I know where the Leaf motor's novel mounts will go. I've got a few options, including the original pickups, but I have a feeling it needs to go to the right as far as practical.


  • New subframe tacked up2.jpg
    New subframe tacked up2.jpg
    254.5 KB · Views: 3
  • New subframe tacked up3.jpg
    New subframe tacked up3.jpg
    281.3 KB · Views: 3
  • New subframe tacked up1.jpg
    New subframe tacked up1.jpg
    329.1 KB · Views: 3