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Home > A-Series EFI / Injection > wiring up aftermarket ecu and wiring loom

matt-atude

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78 Posts
Member #: 8913
Advanced Member

seaford, east sussex

hi all. im running a 1293 with eaton supercharger. i am going to run it with fuel injection on an emerald ecu.
the only problem is that my current wiring loom is for a carb. what is the best way to wire the ecu loom to the mini one. i.e main relay what amp relay how many pins, what fuel relay what amp how many pin. should i run a relay for the fuel injectors or would that run off the main realy? is there any general wire diagrams? or is there any one who has don this sort of loom conversion before?
cheers matt


Joe C

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12307 Posts
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Carlos Fandango

Burnham-on-Crouch, Essex

the megasquirt site(s) is good for info like this,

typically automotive relays are 25-35 amps and are fairly generic.





Edited by Joe C on 19th May, 2010.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Rod S

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5988 Posts
Member #: 2024
Formally Retired

Rural Suffolk

I would have thought Emerald would have posted or provided a suitable (and safe) wiring diagram.

The Megasquirt one that Joe (mini13) has shown is quite generic so quite safe - it's what I have done but I've added an extra relay for the widebands and datalogging and another for the starter motor - but surely Emerald should tell you ???

Schrödinger's cat - so which one am I ???


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

actually thats a good point,

in the emerald manual there is a wiring diagram, it should be downloadable form thir website

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



MrOz

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248 Posts
Member #: 5007
Senior Member

Crazyhill, Livi

Yeah, download the manual from here
http://www.emeraldm3d.com/em_manuals.html

I've attached the relevent pages from it - just for information.


"se ne estas rompita, ne ripar ĝi - supercharge ĝi."


matt-atude

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78 Posts
Member #: 8913
Advanced Member

seaford, east sussex

i haven't resieved the ecu yet should be coming friday morning but i do have the part wiring loom, at the moment im just trying to sort the basic loom structure and what components are needed i.e the relays. i haven't done any wiring on this scale before so i want to make sure i do it right.
thanks for the wire diagram it is very helpful its made things quite alot more clearer. :)
matt


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

no probs,

on that megasquirt diagram not that there are connection numbers for the relays, they tie up with the pins on automotive relays *wink*

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



stevieturbo

3588 Posts
Member #: 655
Post Whore

Northern Ireland

Is the Emerald even capable of running a 5 port successfully ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Rod S

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5988 Posts
Member #: 2024
Formally Retired

Rural Suffolk

On 20th May, 2010 stevieturbo said:
Is the Emerald even capable of running a 5 port successfully ?


Wet manifold / electronic SU ..... *happy*
It won't have the code for siamese port injection.
But then define "successfully" :)


Matt, re. your original question about integrating it into the standard (carb) loom, I wouldn't.

It's all new stuff and the only bit of the existing loom that becomes redundant is the feed to the coil/dizzy (assuming Emerald will be running a proper wasted spark or CoP system) and you can just tape that out of the way.

I made a completely seperate loom for the injection, widebands, data logging etc with its own modular relays and fuses and it just takes its power from the main battery cable at the starter solenoid.

Edited by Rod S on 20th May, 2010.

Schrödinger's cat - so which one am I ???


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

with a charger you can inject before the charger and they are fairly happy. thats what v max do.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



jbelanger

1267 Posts
Member #: 831
Post Whore

Montreal, Canada

On 20th May, 2010 mini13 said:
with a charger you can inject before the charger and they are fairly happy. thats what v max do.

Have you or VMax or anyone else checked the AFR distribution between cylinders? If so, I'd like to see the actual data. But I doubt anyone's bothered to do it because it ran "well enough".

Not to mention that the supercharger manufacturer recommends not to have fuel going through it...

Jean

http://www.jbperf.com/


Paul S

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8604 Posts
Member #: 573
Formerly Axel

Podland

Don't you remember Andy500's problems with fuel distribution?

http://www.turbominis.co.uk/forums/index.p...tid=242798&fr=0

The pictures on the second page are the give away.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

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