Re: Need info/help on gm ecm conversion

[Shannen Durphey <shannen@grolen.com>]

That's it.  

But aren't rotaries good for 7k+ rpm?  Thought somebody said gm boxes
are better suited to low rpm stuff?
Shannen

Bruce Plecan wrote:
> 
> Hmm, ya, 3 rotor, them be them fancy jobs they use in LeMans type stuff.
> Would need 2 MSDs,
> How about using a 165 that just uses the coil fire signal off of the first
> one, as the EST input, and use 1 for all the timing values, and use the
> refence angle to run like 10d retard for the trailing plug.  I like that.
> Grumpy
>    Did a full day in the garage, without a catch net (no one else around).
>    Got heads all torqued, rocker arms/shafts, intake installed.
>    Some epoxy fell into some of the orfices, oh well <g>....
>    Life is good
> 
> > I dunno jack about Mazda rotaries, but I'm getting the impression that
> > one plug fires a short time after another?, in 3 groups of 2?  Anyway,
> > syty ecm controls 3 cylinders, add on a Jacobs or similar timing
> > computer to put out a delayed spark pulse to a second coil for 2
> > sparkies per cyl?
> > Shannen
> >
> > Bruce Plecan wrote:
> > >
> > > Hmm, maybe
> > > one injector event per spark event.
> > > One distributor, or two?.
> > > You wanna keep 2 plugs per chamber I a$$ume. So would take 2 ecms.  Wish
> ya
> > > lived closer, that would be a real fun exercise in kluding......
> > > 165 TBI might be a good beginning. Or that Geo 3 cyl thing....
> > > Grumpy
> > >
> > > > I don't remember if the thread was on this site or the diy site..
> > > > But anhow...
> > > > Bought another rx7.. well actually 1.5 rx7 :-) comes with nother motor
> and
> > > > trans.. coulnt pass it up.. heck of deal.
> > > > So now I have 2.5 rx7's..
> > > >
> > > > Was wonering if anybody had tried or succeded in converting the rotory
> to
> > > > run off of a gmecm....(gears are turning........)
> > > >
> > > > Truck is dead for the rest of this year....blew head gasket.......
> > > > Gonna try for 500hp this time (450 would make me happy)......
> > > >
> > > > Mike Rolica
> > > > Plant A,
> > > > Magnesium Products Division
> > > > Strathroy
> > > >
> > > > (519)-245-4040  Ext. 244
> > > >
> > > >
> > >
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