How to Megasquirt your 3G Hemi
I'd like to thank map63vette for the ride in his ms hemi swap dart. Also the info and details of his swap and being such a nice young man. Very nice car indeed and it runs so smoothly.
I will be going to ms3x route for sure. Just seems a better option to know the in and outs of my efi system. Instead of plug and go. I also want to go with a single coil and plug setup like the ls coils. Can I do this with the hemi reluctor wheel???
The Megasquirt doesn't care which reluctor wheel goes with which coil pack. Two different systems, with their own settings. So yes, you can do it. But The part I would be concerned about it getting a signal to 16 coil packs to trigger... Not sure if wiring them in parallel or in series would get the signal correctly, or if you could modify the box enough to send 16 individual signals.
Are you afraid of blowing out the spark at high boost? Or? I understand the truck lsx coils can handle tons of boost without blowing out the spark. Also I believe the hemi coils are good up to 20+ psi with reduced spark plug gaps.
How much boost are you looking to run?
I actually think it's a decent idea (running 16 lsx coils). Reason I say this is because they are logic level and will fire without a coil driver box (saves ~$100-$200 in coil drivers).
Is the MS3 Pro worth the extra money? Im kinda thinkin since I may have a harness to pilage, this would save so much $$$$. I can solder fine and I can wire. Only EFI experience I have is with an EZ EFI. And it liked a 14.0 idle, 13.5 cruise and about 12.3-12.5 WFO. You can aslo datalog with Ms3x and Pro no?
MS3 pro has a cleaner look, is water tight, and has a different type of connector. If you don't mind putting the MX3x box in your glovebox, then you're not really giving anything up vs the MS3 pro as far as I can tell.
There do appear to be a few changes to the board. You don't need to adjust the pots internally for crank and cam signals.
Looks like you still need coil drivers with it. And it requires an external MAP sensor.
