LT5 DIS was Re: How does a DIS

[Guenther, Max [ASCO/PA]]

I looked into the LT5 DIS conversion.  After reading the Vette shop manual
it appears to be 'almost' bolt in.  Signals to/from the ecm seem to be the
same as the L98.  Most of the work is done in the ignition module.  I really
think you could use it with reletively unchanged '90-'91 Vette code.  I've
priced it out a dozen different ways including Standard parts and its always
over 400 for the module alone.   Part#1103737(obsolete) and Part#(1103841)
I've tried it in all the plug in your # and get a price.  Let me know if you
find one cheaper.

> -----Original Message-----
> From:	Shannen Durphey [SMTP:shannen at grolen.com]
> Sent:	Wednesday, May 16, 2001 1:45 AM
> To:	gmecm at diy-efi.org
> Subject:	Re: LT5 DIS was Re: How does a DIS
> 
> Bob Wooten wrote:
> > 
> > I am not sure that I am completely falowing you here (or we are talking
> > different languages, which is completely possible).  I was not looking @
> the
> > module @ all other than to figure out where it was.  what I was looking
> @
> > was just the coil pack & the plate/holder that they sit on.  this just
> looks
> > like a holder for the coils.  where as the 6 cyl dis assy (GN etc) looks
> as
> > if the module & the holder are built into one.
> > 
> > if someone were to want to build a V8 DIS (as I am) I need a way to hold
> all
> > the coils.  this seems to be the way & I can not imagine that this
> holder is
> > that expensive, even @ dealer prices.  I am sure as the other gent
> mentioned
> > the module is rather expensive, but w/o the rest of the LT5 harness, ECM
> &
> > the other module next to the head lamp, I bet that it does not do you
> any
> > good.
> 
> It seemed like you were asking for a part number for the complete DIS
> system.
> 
> The "coil holder" is a needed part for the car to run, no?  Without it, do
> any of
> the other parts do any good? ; )
> It would be interesting to find out what that part alone is worth at the
> dealership.  LT5 parts cen be extremely expensive, due to their relative
> rarity. 
> Many are out of stock entirely.  But do not believe that GM prices it's
> parts on
> anticipated demand from over the counter sales.  Some of their prices make
> no sense
> whatsoever.  Just the same, it's worth the phone call to check.  Sometimes
> there's
> a great bargain to be found.
> 
> The 6 cyl DIS modules are different between Buick and 60 degree Cheverolet
> based
> engines, due to the different ignition system designs.  The 4 cyl DIS
> module as
> used in the Cavalier is similar to the 60 degree v6 DIS module.  Gutting 2
> of these
> units might provide an economical solution to your coil mounting dilemma.
> These
> parts are extremely common in many junkyards.
> 
> DIS and smart coils has been covered several times before.  No, DIS coils
> are not
> smart coils.
> 
> Hose down engine = spray water on engine.  Don't spray water on an LT5
> engine.  You
> run the risk of damaging the ignition module.  If you're ever in the
> position to be
> washing your ZR1, you might find this tip very useful. ; )
> 
> Shannen
> 
> > 
> > which brings me back around to my home grown DIS (on hold @ the moment,
> > whilst I install the new converter for an attack on the track), I think
> that
> > I have the "module" done for my DIS (both waste spark & CNP) I just have
> to
> > prove it out & ensure that I am not on crack.  but w/o some way to hold
> the
> > waste spark coils I am looking for some other units (RX7 or something).
> > 
> > Sorry, so now I have to ask, are any of the GM Waste spark coils "smart
> > coils"? if they are then cool, if not then I have to work on a driver,
> > probably something like the bosche units.
> > 
> > Hose down the engine?  what do you mean.
> > 
> > Sorry to be so long winded, I appreciate the help.
> > BW
> > 
> > -----Original Message-----
> > From: owner-gmecm at diy-efi.org [mailto:owner-gmecm at diy-efi.org]On Behalf
> > Of Shannen Durphey
> > Sent: Tuesday, May 15, 2001 6:41 PM
> > To: gmecm at diy-efi.org
> > Subject: Re: LT5 DIS was Re: How does a DIS
> > 
> > So far the problem has not been the part no., but the price.  As
> mentioned
> > in a
> > prior post, expect to pay over $400 per module.
> > 
> > Now if someone could come up with a way to use 2 four cylinder modules,
> we'd
> > have
> > scores of cheap parts available for 8 cyl DIS.
> > 
> > The second 8 injectors share pulse widths with the primary injectors.
> When
> > the ecm
> > determines the secondary injectors are needed, an injector driver box is
> > used.
> > 
> > And don't ever hose down the engine in your ZR1!  The module do not take
> > kindly to
> > water immersion. : )
> > 
> > Shannen
> >
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