More Projection stuff

[Fitzgearld, Fredric]

HuMmmmmm...  I was told that the #502-20 (Universal 2D Digital System 
$625.) replaced the, now discontinued, 502-2 (analog system ~$500.).  
It's so new (I guess) that I didn't even see it on Holley's WEB page 
when I went to look.  The 4D and 4Di are about 2x the price.  I would 
love to have the 4Di but the low end will do just as well, for my 
application (rock crawling).  If they send me an analog system, it's 
going back.  I don't want any part of that, again.

I shouldn't have any trouble tuning it as I had the analog system for a 
while.  The brain died and they said it would cost $400. to replace it.  
So, instead of trying to fix/replace the analog ECU I just broke down 
and got the "NEW" system.  I'm hoping that the analog injectors, TPS, 
and stuff will be compatible with the anolog system as I have a bunch of 
new stuff for that system.

You can see the info at:
http://www.jegs.com/cgi-bin/genpg.pl?products/Fuel/projec/



FEF


______________________________ Reply Separator
_________________________________
Subject: Re: More Projection stuff
Author:  Bruce Plecan [SMTP:nacelp at bright.net]  at MSXGATE
Date:    4/1/98 10:05 AM


-----Original Message-----
From: Fitzgearld, Fredric <fredric.fitzgearld at intel.com>
To: diy_efi at coulomb.eng.ohio-state.edu <diy_efi at coulomb.eng.ohio-state.edu>
Date: Wednesday, April 01, 1998 12:46 PM
Subject: More Projection stuff


>Ok, I probably shouldn't have, but I just ordered the Holley, 502-20,
>open loop, TBI system (its' the digital version of the old analog
>system).  I'm hoping to use it as a base for some experiments I've been
>thinking about.  I also hope to use it as a learning tool.
>
>Questions:
>1.  What is the difference between the "502-20" and the 4Di ECM?

You got the analog system, just some dials to twist to calibrate it.
The digitial is the 504 series...

>2.  Is there a way to make a PC interface for the 502-20 like the 4Di

No tables, nothing to look at, sept buy a o-scope adapter, and look
at pulse lenghts.

>3.  Anybody have any interesting bits of information on this system?
>
>Other comments are welcome.


Sounds like ya got something crossed on numbers of discription,
my book says 502-20 Analog.   504 digitial

>Thanks,
>
>FEF

No worries mate
Bruce