Re: Re[4]: [ihc] Holley projection help

[Steven Stegmann <steve.stegmann@xxxxxxxxxxxxx>]

I suspect that what happens with the Holley is that
many of the purchasers don't realize that this is more
complicated than replacing a spark plug.  Nor do they
have a clue how much time is spent by the factories in
tuning and setting up the factory EFIs.  So the Holley
doesn't work well for them but they inadvertantly
learn some lessons.  

So they get involved  with the Megasquirt.  Of
necessity they will have to develop some understanding
of what's going on to build it. MS has a very nice web
site.  By the time they get the MS installed they have
enough knowledge to get it running and I'm sure it
works very well.

What nobody thinks about is that if they now tried to
install a digital Holley it would also work well for
them, it really is a good system.  But it is easier on
the self image to blame Holley for not making a good
system.

In talking to a Holley tech one time he said that 80%
of their calls come from people who don't understand
that a rusty chassis ground isn't good enough, even
though it might work for brake lights.  I'd bet that
if I read through the MS web site I would learn this
same thing.

Steve

--- Colin Gebhart <colin@domain.elided> wrote:

> Hi Mac,
> My comments are embedded
> Tuesday, November 16, 2004, 12:14:25 AM, you wrote:
> 
> MM> unlike the megasquirt, can be adjusted and tuned
> on the fly while
> MM> i'm going down the road, in traffic, under load,
> whatever the
> MM> situation,
> 
> If you like having to constantly tune the analog
> Projection, then it
> sounds great :) My idea of fuel injection is tune it
> once and touch it
> never again, like an OEM. MS can provide that if
> well set up.
> 
> And like MS and digital Projection, my anal nature
> prefers the ability
> to change specific variables rather than twiddle 4
> pots with a
> mishmash of interdependencies.
> 
> MM> looks to me like the only way to tune or adjust
> it is to hook it
> MM> up to your laptop computer, and then make
> adjustments in the
> MM> software, test-drive, adjust, test-drive,
> adjust, etc...
> 
> There are 3 ways to tune it,
> 1) Laptop minimum Pentium I & Windows 95 or Linux /
> MacOS-X / FreeBSD
> 2) A PalmPilot or Windows CE
> 3) MegaView car display unit
> 
> MM> somehow trying to make adjustments while you're
> going down the
> MM> road with this thing doesn't seem viable (or
> safe).
> 
> It is pretty much impossible to tune standing still,
> and no one
> advocates the driver tuning. Most of the 250 people
> who report they
> have installed MS used a friend to tune. Several
> people said they used
> their non-mechanical girlfriends or pre-teen
> children if that gives
> you any idea how easy it is to do. Most people have
> it running well in
> 1 day and might tweek it occasionally for a week.
> After that, the
> concept of MS was to never have to tune it again if
> you don't want to.
> 
> MM> trying to wire up the megasquirt to work with my
> XR3000 the way my
> MM> Holley already does, something that appears to
> be nowhere near as
> MM> simple as it was to connect the Holley to the
> XR3000.
> 
> There were some tach circuit problems with early
> edition MSes that
> required hardware tuning. Now the tach circuit is
> very reliable.
> However you have the Holley hooked up should work
> fine. If it is just
> tapped on the coil at the primary 400 volts, best to
> add an inline
> resistor. I would be amazed if the Holley hasn't
> barfed on that. Too
> bad Crane did not provide a "logic level" tach out
> like MSD.
> 
> MM> the whole thing seems *way* too complicated just
> to replace my
> MM> ECU, an ECU that already works very well and
> meets all of my needs.
> 
> If you are happy with your ECU, then I agree you
> shouldn't change. But
> the happy Projection users here seem to be in the
> minority in the
> wider EFI world. And I don't think you give yourself
> enough credit. I
> didn't know what I was doing when I started, and I
> put the MS together
> easily in 2 days. The Scout on the otherhand was a 2
> year ordeal
> trying to prepare for fuel injection, which I
> basically gave up.
> 
> --
> Later,                                         
> http://thegebharts.com
> Colin.                                   
> mailto:colin@domain.elided
> 
> My wicked email client is   
> http://www.ritlabs.com/the_bat/index.html
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> Money will not buy happiness, but it will let you be
> unhappy in nice
> places. -unattributed