More Projection stuff

[Tyson McPherson]

The 502-20 is a digital replacement for all of the two barrel analog kits.
It is still a open loop system that is adjustable via the familiar control
knobs, and there is no interface for any type of PC. This new box does allow
for the user to plug a oxygen sensor directly into the ECU; to allow for
limited closed loop operation.

The 4DI is a better system, but it does cost more.

Tyson
tyson at ns.net



-----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 9:53 AM
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?
>2.  Is there a way to make a PC interface for the 502-20 like the 4Di
>3.  Anybody have any interesting bits of information on this system?
>
>Other comments are welcome.
>
>Thanks,
>
>FEF
>