The question in short, I am a little confused. Is there any way to have a leading and trailing spark on 2nd gen coils using msII v2.2?

 

no there isn't. At least not yet.

Right now your only options are the 2.2 board or the v3 board either one with msns-extra on an MS1 chip.

 

Muythaibxr can you explain more, are you saying with 2.2 or v3 you can have leading and trailing if I use a ms1 chip I can have the both leading and trailing? Just to explain, I have not bought one yet. But for one of my projects I am wanting to use megasquirt because I beleive it would be the easiest option. But in your opinion which megasquirt should I buy to ever have a chance to have a leading and trailing spark. The project I am wanting to use it on is S5 Rotors and housings with 12a irons that are bridgeported. I am wanting to have it converted to fuel injection. Any advice you can offer would greatly help.

 

Right now only MS-1 chip is being used for rotary using stock ignition. It will operate both leading and trailing.

Im not expert but S5 housings and 12A irons ?

 

The MS-1 processor runs on either v2.2 or v3 board, and either can run recent msnsextra code that includes rotary ignition support. I'd recommend purchasing the v3 board, as it has many nice built-in features that greatly reduce the board mods required.

IIRC the early (12A) engines have o-rings in the housings, and later engines (S4, S5...) have o-rings in the irons. Are you machining your own o-ring grooves into the irons or housing? Early center irons have no injector provision as well, which may be an issue if you don't already have other plans in that area.

 

Yeah, thats what I was looking for. Will I have to have a seperatee board to allow for spark control or will the v3 board with ms1 processor take care of the spark for me?

Yeah, I already know about the o-rings. My uncle at T-J Automatics and Rotary Performance in atlanta georgia is doing all of the machine work for me.

As far as the fuel injection goes it will actually just spray into the intake kinda like a honda's fuel injection works. And yes I will still be using four injectors.

 

It really depends. If you want to cut 2 teeth out of your CAS, then you can control ignition without any extra daughtercards.

If you want to use a stock CAS, then you have to either get a daughtercard, or build an lm1815 circuit in the proto area on the v3 board.

Either way you have to do some other mods to the v3 board in order to control ignition (mods which don't require a daughtercard).

If you take a look at the FAQ sticky at the top of this section, it tells you what mods are necessary.

Ken

 

Thanks so much Ken you have been very helpful. Thanks to everyone else who has also helped.