From: "Haywire" <haywire@telus.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Tachs & things
Date: Sun, 27 Jul 2003 12:21:25 -0700
Message-ID: <KBEFIEPBOPOMCMDLIBAAKELPCAAA.haywire@telus.net>
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Hi Dave;
	Thanks for the info, but I already have my wires. It wasn't really a big
deal, I was just pointing out that the whole GM-LS1 package is not as
"off-the-shelf" as expected. And that it is not a simple matter to swap
wires from my Jeep, to test operation of an inductive tach.
	I had ordered 2 divide-by-"N" binary counters from a local dealer for $1.05
each, but he informed me that they might be up to 2 weeks, so I found a
different divide-by-"N" counter on Digi-Key for $0.71, but I ordered 25 of
'em. Should be here in 2 days. Hopefully it will work on the tach.
	Tracy, if you're listening, what do you think of this idea to divide the 12
pulse EC2 tach pulse by 3 to give a signal that will indicate correctly on a
4-stroke tach set for 8 cylinders?

S. Todd Bartrim
Turbo 13B RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

   "Whatever you vividly imagine, Ardently desire, Sincerely believe in,
Enthusiastically act upon, Must inevitably come to pass".

> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of David Leonard
> Sent: Sunday, July 27, 2003 10:57 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Tachs & things
>
>
> Todd,
> I found getting wires for the GM coils very easy.  Simply order a set of
> MSD custom wires then call MSD for the fittings.(got mine from Summit)
> They will send them free in a few days.  Here is the original message
> from Al....
>
>
>   "Looks basically the same idea as the MSD 8.5mm wires.  Best price I
> found on the MSD wires was at www.sdpc2000.com .
>
> "Since the only sets that MSD makes with the LS1 coils end sockets are
> factory made for specific engines, I talked directly to the MSD tech rep
> and he offered to send the LS1 ends at no charge, so I could put them on
> a "universal" set from a retailer.  If you are going this route, call
> MSD at 915-855-7123 and them you need the LS1 coil ends for your
> wires.-Al Gietzen"
>
> David Leonard
> The Rotary Roster:
> http://members.aol.com/_ht_a/rotaryroster/index.html
>
> > -----Original Message-----
> > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
> On
> > Behalf Of Haywire
> > Sent: Sunday, July 27, 2003 3:38 AM
> > To: Rotary motors in aircraft
> > Subject: [FlyRotary] Re: Tachs & things
> >
> >
> > Hi Ernest;
> >
> >
> > > Todd,
> > >   What kind of plug wires are you running there?
> >
> > They are a custom made plug as the GM 'vette coils don't fit a
> standard
> > plug
> > wire. I seem to remember the parts guy saying that all the plug wires
> are
> > suppression these days, however there is no marking on the wires to
> > confirm
> > this.
> > 	Anybody who is yet to order the EC2 should know this when
> deciding
> > whether
> > to have it set up for Mazda coils or GM coils. When I made my choice I
> > assumed it would be a no-brainer. Knowing that the Mazda coils are
> > expensive
> > and assuming they may be hard to find, I figured that the GM coils
> would
> > be
> > a cheap off-the-shelf product, available from any number of
> aftermarket
> > parts stores. They are anything but. This is not to say that they
> won't
> > work
> > well, but just a heads up, that they are not as easy & cheap to use as
> > might
> > be expected.
> >
> >
> > >
> > > So, with this theory:  Your timing light might be working because
> it's
> > > pickup is more sensitive.  That could be because it has more wraps
> of
> > > wire in it's coil, or because it has a more expensive transistor.
> Or
> > > it could have a Hall Effect transistory and the tach not.  But it's
> all
> > > to say that you're not emitting enough noise for the tachs, even
> though
> > > there is enough for the timing light.
> >
> > A quick inspection of the inductive pick-ups on both instruments
> revealed
> > that the timing light has far more wraps of a much finer wire than on
> the
> > tach.
> >
> > >
> > > Try using an unshielded wire on one plug that you attach the tach to
> and
> > > see if you get any response.  If the tach works on your car, try
> pulling
> > > one wire from there for just a few minutes as a cheap test.
> >
> > Good idea, but as pointed out above, the standard plug wires won't fit
> on
> > the GM coils :-(. Now with that said, I must confess that I haven't
> even
> > tried a standard plug wire. When I bought the coils and asked for
> wires, I
> > was informed that they wouldn't have anything to fit them, but they
> were
> > able to have some made up and shipped up next day at no extra cost.
> > 	This is the unfortunate thing about having the airplane at the
> > airport.
> > It's not as easy to quickly try new things, when good suggestions come
> in.
> >
> > S. Todd Bartrim
> > Turbo 13B RV-9Endurance
> > C-FSTB
> > http://www3.telus.net/haywire/RV-9/C-FSTB.htm
> >
> >    "Whatever you vividly imagine, Ardently desire, Sincerely believe
> in,
> > Enthusiastically act upon, Must inevitably come to pass".
> >
> >
> > >>  Homepage:  http://www.flyrotary.com/
> > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html