Citroen CX GTI Turbo Engine Management

[Bilkob]

So, a fantastic day today for this project. The bespoke loom, ECU, new injectors, all new sensors, fuel pump and filter, turbo, radiator, clutch, diesel gearbox, turbo and boost plumbing etc, etc....all came together and IT WORKS!!!!!!!
Ignore the messy wiring and layout, I just wanted to get it running. A massive thank you to Karl at Emerald tuning who has been superb all the way through.
A CX GTI Turbo 2 now running on completely new engine management.
No more air flow meter, AEI or fuel computers, old wiring, etc and fully map-able and adjustable boost.
A very good day!!!

Edited by Bilkob on Wednesday 6th January 16:44

[rickygolf83]

Amazing progress, turned your dream into reality

[Bilkob]

Well, I’m getting there. I’d not really thought about how hard it would be doing this outside, on a gravel drive, I used to build Group C cars in a beautiful heated workshop...... but I’m determined to see this through.
Will hopefully have the hydraulics up and running by the weekend, then it’ll really feel like progress.
ONWARDS!

[Bilkob]

[Bilkob]

So, lots more progress. The car now starts, runs, drives, brakes, all hydraulics seem to be working, steering self centres, etc.
I’ve had a first installation of the new heat A/C unit, and after plumbing it into the water system and jury rigging a switch inside, I now have a SRTONG blast of interior hot air on a CX. A first!!
Also now have all lights, etc now working.
Next up is to finish engine bay wiring for good, tidy/rationalise central console wiring nest, service front brakes, fit drivers seatbelt then it can’t be far off an MOT!
Then it’s new bespoke stainless exhaust system, then............PAINT!

[Bilkob]

[stevieturbo]

I would generally avoid routing HT leads in parallel, and in direct contact with each other. At least try and give them some sort of air space between them all.

Some will get away without issues, some will not.. Although if it still retains a dizzy, potential crossfire issues may be less.

[Bilkob]

That’s the clever bit. They’re not H/T leads. It now runs coil on plug units, Denso, from a GSXR1000.
No distributor or coil pack as such. All run from Emerald’s bespoke ECU. No air flow meter, no Sparks computer(AEI) no fuel computer.
Emerald’s car is now running 1bar boost and churning out 300lbs ft of torque, I’ve fitted a turbo diesel gearbox and uprated clutch, if it’ll drag it’s old arse through the air it SHOULD do 150mph.
The sheer wiring in the two redundant looms is astonishing, I expect the same amount to be removed from the ‘climate control’ wiring and looms inside.....
Mind you, it might blow up too...😂

[Huff]

Loving this! Wonderful car and project.

[Bilkob]

Thank you. I’ll keep posting, and if all goes well, there’s a road trip to Gaillac in August planned to deliver (another project..) Look bike to keep at a friend’s and ride down there.
Please, no one soil this thread with COVID or Brexst garbage.

[stevieturbo]

Bilkob said:

That’s the clever bit. They’re not H/T leads. It now runs coil on plug units, Denso, from a GSXR1000.
No distributor or coil pack as such. All run from Emerald’s bespoke ECU. No air flow meter, no Sparks computer(AEI) no fuel computer.
Emerald’s car is now running 1bar boost and churning out 300lbs ft of torque, I’ve fitted a turbo diesel gearbox and uprated clutch, if it’ll drag it’s old arse through the air it SHOULD do 150mph.
The sheer wiring in the two redundant looms is astonishing, I expect the same amount to be removed from the ‘climate control’ wiring and looms inside.....
Mind you, it might blow up too...??

The picture certainly looks like HT leads.

[Bilkob]

Silicone shrouds over 2 wires to feeds the coil on plug units. Deliberately made to look like the original leads

[stevieturbo]

Bilkob said:

Silicone shrouds over 2 wires to feeds the coil on plug units. Deliberately made to look like the original leads

Haha, very nice.

[seveb]

Lovely car and a lovely conversion, what a great project. Also nice to hear Emerald is still delivering, really nice people. I remember a very long time ago Dave Walker writing in Car Mechanics magazine that he'd been really impressed with the performance of a car and that it had an ECU not carbs, and that he intended to spend some time learning more about ECUs. He did that didn't he !

[Bilkob]

Emerald-Karl- have been utterly superb. Everyone else said I couldn’t do this , Karl understood immediately, it did help that he has one there......
They also get that this will be no hot-rod, but a wafty whooshy continent hoover, but it will have a decent amount of grunt!

[stevieturbo]

Don't see why anyone would say you couldn't do it, let alone everyone. It's all pretty straightforward stuff.

But a cool and different project and neatly done.

[Bilkob]

It was getting the crank trigger signal to ‘work’ Apparently its an odd number of flywheel teeth. This set up still uses a signal from the original crank trigger, rather than have to drill the flywheel for a ‘slug’ or run something off the camshaft...

[Huff]

Bilkob said:

They also get that this will be no hot-rod, but a wafty whooshy continent hoover, but it will have a decent amount of grunt!

Exactly the reasons I think this is ... a wonderful project: take all that was special about the original, and just amplify it, sui generis.


Heartening to read you've had such great support, too. Looking forward to reading about where you go next

[Bilkob]

Thanks. I’ll keep posting. I am determined to drive this to the South of France before year’s end

[Bilkob]

More progress. I now have all lights, horn, etc working, so I THINK that’s most of the MOT-able electrics done. I’ll do another brake bleed now that the hydraulic system has settled down, it’ll let me run more new green magic fluid through the system. The engine bay is 90% there now I think, and because the custom heater unit is now so compact and hidden mostly behind the centre console, it looks like I CAN run the spare wheel under the bonnet as per original.