My DIY EFI

[John Dammeyer]

At 09:56 AM 17/08/1996 -0700, you wrote:
>Dave,
[SNIP]
>	I personally think some of the levels of sophistication that's going
>into some of these DIY EFI's are a bit ridiculous.  I've done a lot of
>work with some antiquated units as well as very sophisticated units and
>when it comes down to raw horsepower, there wasn't much difference to
>speak about.  Maybe CAN bus stuff might be good for a electronic dash
>board, but personally I can't read flickering digits at 200+ Mph, give
>me analog any day.
>
>Todd Knighton
>Protomotive Engineering.

CAN bus here has nothing to do with how you output the information.  Just a
handy way to report what is going on inside the system and communicating
that information to other parts of the car.

Look at it from this perspective.  You need some of the engine parameters at
the dashboard for the instruments; digital, analogue or mindlink.  The
drivers door just needs to attach to this bus and tell each of the outher
windows to go up/down or doors and trunk to lock/unlock as opposed to
running the heavier wires and switches all over the place.  Each door just
has the +12 and CAN bus.

The grief my '87 Jeep Cherokee is giving me at this point because somewhere
I have a defective set of wires and ergo no power doorlocks makes a
supporter of less wires, just heavy +12 Volt and signals.  Down side is
definitely more technical knowledge and equipment needed for trouble
shooting but the level of trouble information available at one location,
(the mechanics laptop sitting in the passenger seat), as the vehicle goes
around a left hand corner at 13 MPH and stalls; not at 12 MPH and not at 14
and never at the dealers.

As for antiquated verses modern.  I quite agree, for general tooling around
town where the last 1.3458213 HP isn't that important even the old
mechanical system in my '76 SAAB was awesome but I did have to change points
periodically.

John.


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with arrows in their backs.
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