additional thoughts...caddy-olds and the buick

[Don.F.Broadus at ucm.com]

The Spalding Flamethower was the coolest, looked like a Vertex Mag. I have a
H&H Dualcoil dist. that I could set up like you wanted to do with the
Flamethower. Why not use two   4 wire HEI modules on heat sinks triggered by
pickup coils where the points 
used to be. If the mag pickups wont fit , I haven't tried it but you should
be able to trigger the HEI modules with points and a small voltage. I have
spun a HEI on my dist. Machine and the pickup coil will run fine at 4000
dist RPM, (8000 engine) the  stock coil and  stock  990 module seems fine at
5-6000 RPM engine, The spark gets a little thin and erratic at 7-8000
engine. This is with plugs sitting in the open,  gapped at .045. You are
correct that the stock HEI coil can't be fully saturated with the stock  990
module. This is done to control coil temp and limit peak current in the
primary  to around 6 amps. External coils can dissipate the extra heat and
handle higher primary current. Aftermarket modules have longer dwells and
can sink 8 amps i believe.        
   




> -----Original Message-----
> From:	Shannen Durphey [SMTP:shannen at grolen.com]
> Sent:	Thursday, November 11, 1999 9:13 PM
> To:	gmecm at efi332.eng.ohio-state.edu
> Subject:	Re: additional thoughts...caddy-olds and the buick
> 
> gmecm at efi332.eng.ohio-state.edu wrote:
> > 
> > Right on the money Shannen ,Your thinking what I was thinking of doing
> with
> > the 4 cly coil paks, the  2 crank sensors 90 deg ,ref pulses, 1 coilpak
> > master, 2nd coilpak slave   ect. I would batch fire the injectors so you
> > wouldn't need a cam sensor. The north star system would of course work,
> but
> > I thought we were looking for a cheap alternative. I have also wanted to
> try
> > 4 pickup coils 90 deg around the balancer ,each pickup feeding a 7 term
> HEI
> > module. The HEI module would fire a coilpak. All controlled by the
> ECM,batch
> > fire the injectors. The Ref pulses would need to be figured out.
> Interesting
> > stuff.
> > 
> > Don
> New thoughts.  1 module, 1 sensor, 4 coil packs.  2 packs each tied to
> common power, alternate trigger between the two.  My Q is whether or
> not the 4 cyl module will care if it has extra crank pulses between #1
> and #1. 
> Double coil thing... At one time I was working on an HEI version of
> the old dual point "flamethrower" distributor.  Dual coils, flip/flop
> between the 2.  Is the HEI rpm limited because the coil can't be
> saturated?
> Shannen
> > 
> > 
> > 
> > > -----Original Message-----
> > > From: Shannen Durphey [SMTP:shannen at grolen.com]
> > > Sent: Wednesday, November 10, 1999 7:58 PM
> > > To:   gmecm at efi332.eng.ohio-state.edu
> > > Subject:      Re: additional thoughts...caddy-olds and the buick v6
> > >
> > > Shannen Durphey wrote:
> > >
> > > > > >
> > > > Thinking out loud, please correct me....
> > > > You'll need to have 2 crank sensors, offset 90 degrees around
> > > > balancer, and tie module ref outputs together, but keep pulse from
> 1st
> > > > module away from module 2, and vice-versa, and you definitely don't
> > > > want to run it with SFI unless you can guarantee that module for
> cyls
> > > > 8+5, 3+2 never sends ref. pulse first.  Didn't the caddy 4.1/4.5l
> and
> > > > the Norstar have DIS?
> > > > Shannen
> > >  EST line needs to be seperated also, yes?  Signal from ECM to module
> > > must be split up between the pair of modules.
> > > Shannen