Re: 747 Rom Emulator / design

["Bruce Plecan" <nacelp@bright.net>]

try

www.kalmaker.com

was at one time, might need a .au
Dead end in my opinion, need a "special" ecm, and a special memcal.  Like
$800 to do one ecm, wow what a bargain (meant sarcasticly).
Then with the record of just closing shop, and no support, just watch your
wallet
Grumpy


> Yes, on the dyno under heavy load would be a bad time for
> limp mode. By doing the updates within the ecm cycle alleviates
> this. Hence, why I mentioned the technique.
>
> I've heard of this Kalmaker before, it would be interesting
> to see what/how it is made.
>
> BobR.
>
>
> Daniel N wrote:
>
> > Please Excuse me if i sound stupid here and/or correct me if i'm wrong.
> >
> > But what if your Tuning a car on a Engine dyno, and you change one of
the
> > settings, and the engine goes into limp mode whilst on load on the dyno?
I
> > dunno about you folks :) .. but i've seen quite a few aftermarket EFI
> > setup's on the dyno dynamics Dyno's we got here in australia.. and i
dont
> > really see it being a good thing?
> > like i said, correct me if i'm wrong..
> >
> > Also, a little on the Emulator board, isnt there a simpler way of doing
it ?
> > I mean, i'm not saying its bad or anything, but compared to the Kalmaker
> > emulator we have here for the Holden Delcos.. it looked much smaller /
> > simpler.. but then again have i missed something? Has anybody here seen
the
> > kalmaker setup ?
> >
> > Daniel
> >
> > >From: rr <RRauscher@nni.com>
> > >Reply-To: gmecm@diy-efi.org
> > >To: gmecm@diy-efi.org
> > >Subject: Re: 747 Rom Emulator / design
> > >Date: Thu, 27 Jul 2000 17:22:46 -0400
> > >
> > >
> > >Dual port ram is really not required. It's expensive and can be
> > >tough to get. Remember that the ecm's bus cycle time is almost
> > >a usec. Some 100 to 150 nsec SRAM can easily be updated
> > >within a part of the cycle.
> > >
> > >Another way to look at it is: Does it matter if the ecm goes into
> > >limp when your updating the ram, you can't be driving at
> > >the same time your punching keys on a laptop.
> > >
> > >BobR.
> > >
> > ><snip>
> > >
> > >
>
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