Megasquirt ignition setup on CVH EFI

[Red_bull]

Hello, I'm quite new to the megasquirt thing and trying to find out some things. I want to buy a Megasquirt 2 with V3. I would like to run a set up without the ford edis system to be fully in control of ignition and be able to run ignition cut for example. I also would like to stay with 1 crank input as that is std on my CVH EFI engine. I have found this in the manual about 1 crank input with two outputs: M-N toothed wheel comes in on Input 1 and there is no Input 2. The first tooth after the missing tooth starts the firing sequence on Output 1, then fires Output 2 after Skip teeth (= next tach), and alternates thereafter. This option provides 'wasted spark' coil firing for 1, 2 or 4 cylinders. For a 1 or 2 cylinder engine the two outputs must be tied to the single coil. You can also do 2 or 4 cylinder wasted spark with this crank wheel only option. There are 2 flavors of this: Odd angle = 0 and != 0. The difference is that pure wasted only has one coil - and you have 2 outputs, so you have to tie them both together using a logic OR gate. Or you could ignore one output, but then MegaTune would display double or half the actual rpm. This setup has symmetric inputs and outputs - that is you fire each output every 180 deg and it is even fire. With odd-fire, you have to fire non-symmetrically, so you MUST have 2 separate coils which are fired separately every 180°, with the offset put into Odd Angle. I have a even fire engine with a 36-1 toothed wheel so till now it looks fine for me.. Also this is in the manual IMPORTANT! You can directly drive a maximum of one coil per ignition driver with MicroSquirt! This is because the coil driver (the VB921) can only sink enough current for one coil. That one coil can be a double ended 'wasted spark' type coil for two cylinders/coil (ex. the Ford EDIS4 coil pack with each coil driven by a separate driver), and it will be fine. But you CANNOT 'direct drive' two separate coils in wasted spark configuration driven directly off of one ignition driver (see below). If my english is good enough they mean with ex. = example so my ford coil pack should be fine. My questions are : Is this possible with the MS2 and V3? Are there big disadvantages? What i need to change on the ECU to change it to get the two outputs! Can i fix it in megatune or do i need to change something in the hardware? Or is it a plug and play like it's displayed on here: http://www.extraefi.co.uk/Drawings/PDF_ ... l_Pack.pdf I hope somebody can help me, because my english isn't good enough to sort this out on my own and i don't want to start with blowing my ecu or forgetting things in my order...

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[rich123]

just leave it running coilpacks the m/s only needs a crank sensor and 36-1 wheel to run its an easy setup

[Red_bull]

Originally Posted by rich123

just leave it running coilpacks the m/s only needs a crank sensor and 36-1 wheel to run its an easy setup

So it's basicly plug and play like on the link in my first post? Sorry but it's difficult for my to understand your answer

[rich123]

yep plug and play basically

[AlexF]

just run wasted spark on an MS2 V3 ECU

Alex

[Red_bull]

Originally Posted by AlexF

just run wasted spark on an MS2 V3 ECU

Alex

That's what i want! I want to run it like this http://www.extraefi.co.uk/Drawings/P..._Coil_Pack.pdf

BUT!! the standard diagram has only one ignition output on 36 and not the output like the pdf says on #6.

So my question is how can i get the ignition output on #6 or is it allready there on the MS2 V3 board?