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Q&A > General Tech Advice > Megasquirt - a story of injection > Community Forums > Mustang Forum Australia - Mustang Tech

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Husky65
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So in the initial wiring you wire up each coil and injector individually. Then just add a cam sensor and that should be it?


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hybrid
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Yes, you can use a cam sensor from a later model windsor (I've got one in mine just to block the dissy hole and drive the oil pump).
And yes, the injector wiring is definitely different if you're running sequential fueling.
In batch fire, there are two injector channels, so you would wire up 4 injectors per channel.
With sequential, you will run 8 separate injector wires - one to each injector.


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hybrid
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When you get to the point of switching over, let me know and I can probably come and give you a hand.
I hate wiring, but I can sure as hell bark orders around while you do it Mr. Green


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Husky65
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Yeah I'll definately take you up on that offer. I am moving closer towards you anyway in a few weeks so that will make it easier.

Is sequential injection only run at cruise. At WOT does the ecu go to batch? And can you run sequential injection with the coils being batch fired?


Last edited by Husky65 on Sun Aug 06, 2017 7:01 pm; edited 1 time in total

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hybrid
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No, it's sequential all the time. The engine knows exactly where each cylinder is in it's cycle, so it injects the fuel at the right time for each cylinder.
Yes, injection and ignition are completely separate settings. But if you've got 8 coils, why not go sequential ignition too?


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Husky65
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Just ease of wiring. Is there any benefit to not wasting spark in sequential?


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hybrid
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Your coils spark twice as often in wasted spark (obviously).
On a high revving application it may mean that you don't have enough dwell (coil charge) time between ignition events.
But on our cranky old V8's this is generally not a problem. When you're putting all those wires though the firewall, it's not that big a deal to run 4 more.
But quite honestly, you won't notice any difference between wasted spark and sequential spark.

In many conditions you won't notice a difference between batch fire injection and sequential either.


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Husky65
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Another question. I had a read of the regular Megasquirt 3X, and couldn't see anything in the docs about AC compressor control
Do any of you know if you can control the compressor, as in turn it on and off, with the MS3x? I now with the ms3 pro you can, and can choose to cut it out at certain rpm's/tps settings.


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boofhead
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You can do that with any of the MS's even without formal functionality it can be done with programmable IO.

I did it on my MS2 mustang before they added formal feature them I changed it for dual speed fan control.

I did help gbx (phone calls only) to do the ac idle up functionality.

MS3 has full support.


I will someday think of something clever to say.

Last edited by boofhead on Wed Aug 09, 2017 10:39 pm; edited 1 time in total

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Husky65
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Ok sweet. Thanks. Just trying to research as much as I can before I pull the pin, unlike most things I buy


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boofhead
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Moving on as my log tuning approach had no comments and Husky looks set as well

In car visual dash;

I like to see gauges that display the data to the driver. lots of ways to do it but I feel the easiest and most integrated way is a head unit

www.aliexpress.com/ite...20207.html

This unit has so much functionality then on top add ShaddowDash android software for the digital dash

for example


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hybrid
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Do plenty of research on those chinese units. I was looking at them years ago and there's plenty of complaints about them being slow.

In particular, that one has 1G RAM - I personally wouldn't go that low.


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boofhead
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I would try it out - 1gig when only streaming data = ok in my mind.


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hybrid
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If that's all you're going to use it for then it *might* be OK.
But it's still got to run an OS, plus whatever other apps are part of the base system.

But in my Android experience, I'm not sure it's going to cut it.


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Dwayne
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Can you just use a handheld mini tablet? That way it's completely removable and easily upgraded.


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