Plug and play loom for 302 EFI

Hi. I am looking for a complete loom and engine management system for my Ford V8 302 stroked to a 347 with EFI. It has a Renault 5 speed box with Quaiffe internals. Motor was built by Mike Huddard.
thanks
 

Jasper

Supporter
Can't help you, made my own with a MS3Pro ECU, and Bussmann RMTR Fuse/Relay box.
Is a lot of fun to figure this out on your own. You are 100% in charge of the fit and finish of the loom, and you are 100% in control of what the ECU does.
Down side: steep learning curve.. but so is everything on a GT40
 
Can't help you, made my own with a MS3Pro ECU, and Bussmann RMTR Fuse/Relay box.
Is a lot of fun to figure this out on your own. You are 100% in charge of the fit and finish of the loom, and you are 100% in control of what the ECU does.
Down side: steep learning curve.. but so is everything on a GT40
Thanks Jasper, I’m starting from scratch. I will use the way dieting Accel management system and will work off that. I have a load of aircraft fittings and connectors ordered, going to use breakers instead of fuses. I know what I’m after I just don’t know what to do
 

Mike Pass

Supporter
Call Dave Walker at Emerald. They will be able to supply what you need and advise on open/closed loop etc.

Cheers
Mike
 
Call Dave Walker at Emerald. They will be able to supply what you need and advise on open/closed loop etc.

Cheers
Mike
Thanks Mike, appreciate it.
 

Andy Green

Supporter
I recently converted Neil Johnson's Southern GT fitted with a 347 engine to an Emerald ECU, with electronic throttle control, so they will have got a good base map. It already had 8-Stack throttles, but we ditched the distributor fitted coil packs. PM if you want more details
Regards,
Andy
 

Cliff Beer

Supporter
Jack, what EFI system are you using? I've installed a couple FAST 2.0 EFI systems on 8-stack 347's and they work really well. Quite simple and complete engine mgmt systems for a reasonable price. Easily custom-tunable, but the stock self-learning works very well. The ECU and harness and various sensors are all good quality.

Seems like it would be a lot more efficient to buy something off the shelf with some proven record rather than custom engineer/build it.
 
Does anyone know where I can buy a motec for my 302? Decided to come away from the Accel as it just seems there’s so much to do very little. Has a separate box the size of the ECU for spark and another for O2. Just seems excessive.
 

Shaun

Supporter
Hi Jack, Mick at SGT supplies a Motec ECU, I am just fitting mine now which is a little bit of a challenge not least as my Jenvey manifold fouls the MSD Distributor, some careful grinding has taken place. He also has a guy who builds a loom for it as well, mine is a 302 (stroked) got some pictures on my build log here of the ECU
I have the Motec M84 with MSD ignition
Cheers
 
Hi Jack, Mick at SGT supplies a Motec ECU, I am just fitting mine now which is a little bit of a challenge not least as my Jenvey manifold fouls the MSD Distributor, some careful grinding has taken place. He also has a guy who builds a loom for it as well, mine is a 302 (stroked) got some pictures on my build log here of the ECU
I have the Motec M84 with MSD ignition
Cheers
thanks Shaun, appreciate it. How much did it cost you for the ECU and ignition? Tidy build
 

Shaun

Supporter
ECU was about £1,400 with dual LAMBDA
Looms was £595, its well made for sure and seems to fit well I have sited my ECU behind the passenger seat
 
ECU was about £1,400 with dual LAMBDA
Looms was £595, its well made for sure and seems to fit well I have sited my ECU behind the passenger seat
I think that’s where I shall put mine. I only have one Lambda port on the left collector so I shouldnt need dual loom option. Who will you get to tune yours? I have managed to find one online for £1100 so think I’ll go ahead. Which coil was it that you went for, there are a few options.
 

Shaun

Supporter
Mick has a guy that will send an initial map to get it started then do the final tuning. I went for a MSD8579 billet distributor with a MSD6AL ignition control and to keep it MSD I chose the MSD Ignition Blaster 2
Not sure of single or dual Lambda but Mick did suggest dual so opted for that, only building this once, well this one once the next will be a doddle!!!
 

Andy Green

Supporter
Hi Jack,
I wouldn’t get too hung expensive & complicated ECU’s If you’ve got a cross-over exhaust system, a twin oxygen sensor will struggle to function correctly as it’s taking information from both banks and won’t be able to discriminate which cylinder to change the fuelling on. A single wide band sensor will be sufficient.
To use this function correctly, it will require calibrating with the engine with on a dyno, with individual exhaust sampling and the ability to carry out fuel trims within the software on each cylinder

Regards,
Andy

P.S. this stuff is also my day job!
 
Hi Jack,
I wouldn’t get too hung expensive & complicated ECU’s If you’ve got a cross-over exhaust system, a twin oxygen sensor will struggle to function correctly as it’s taking information from both banks and won’t be able to discriminate which cylinder to change the fuelling on. A single wide band sensor will be sufficient.
To use this function correctly, it will require calibrating with the engine with on a dyno, with individual exhaust sampling and the ability to carry out fuel trims within the software on each cylinder

Regards,
Andy

P.S. this stuff is also my day job!
Thanks Andy I appreciate your input. Do you have a full ECU/disi loom etc that will work for my set up?
 

Andy Green

Supporter
Hi Jack,

I’ve built engines for ‘40s with ECU’s from Emerald and SCS-Delta. Both companies can provide an engine loom with a pre-terminated ECU plug. These are then cut to length to the relevant components. I then add a multi-pin bulkhead connector (ITT Cannon), which makes installation and engine removal a lot easier. Emerald also do a nice relay/fuse loom to cover the functions of coil, ignition, fan & fuel pump control

Regards,

Andy
 

Chris

Supporter
Hi Jack,

I’ve built engines for ‘40s with ECU’s from Emerald and SCS-Delta. Both companies can provide an engine loom with a pre-terminated ECU plug. These are then cut to length to the relevant components. I then add a multi-pin bulkhead connector (ITT Cannon), which makes installation and engine removal a lot easier. Emerald also do a nice relay/fuse loom to cover the functions of coil, ignition, fan & fuel pump control

Regards,

Andy
With the Emerald it only has 6 injector/ignitor drivers I’ve noticed. Have you found any issues/downsides with running batch injectors against a sequential system?
Does this mean you don’t need to run a cam sensor because it’s not cylinder specific firing? I guess it makes it much simpler sensor and mapping wise.

What ignition system do you normally use with the Emerald?

Bear with me if some of these questions are for dummies please haha :cool:
 

Andy Green

Supporter
Hi Chris,
There’re no real issues running batch fired injectors, unless you’re trying to meet the ultra-tight emissions regulations. The only way you’d tell the difference is on an emissions drive cycle, and this would be after many hours on an engine calibrating the base spark & fuelling

With this type of system, it doesn’t need to know which individual cylinder is firing, but it does need to know where it is relative to TDC and the firing order. This is done with a crank mounted trigger wheel and sensor, typically 36 teeth, with one tooth missing to give a reference

An Emerald or similar system will work with a conventional distributor, but as it’s an archaic method and it’s a packaging issue on these cars. Modern individual coil on plug or wasted spark systems offer much higher energy and hence will ignite leaner mixtures. The Emerald K6 has 6 ignition drivers, so whilst this ECU is not suitable for coil on plug on a V8, it will run 4 wasted spark coils. I use two Ford 4-cylinder coil packs and these are paired up in the same way as the injectors

Hope this helps
Regards,
Andy
 
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