Projection

[Fitzgearld, Fredric]

Ya, I get around.  :)  This list is nearly over my head, but I like it!  
Some of the people on this list are so hot they have to wear the hats 
with the electric fan built in them.

One of the things I'm going to look into is the differences between the 
ECU connections.  I suspect that all the  stuff external to the ECU is 
the same, but I won't know till it gets here.  Also, rather then 
spending too much money for the Holley O2 setup, I'm hoping to make it 
myself for half the price.  I'm sure those with the 4D and 4Di can tell 
us if it's heated or not.

With the help of the list, I would love to make this a "2Di" system.  I 
know there is no way for it to be as flexible but there must be 
something that we can change to make it work for the better, or at least 
improve it's "Geek Appeal".  It could be as easy as adding/changing a 
few chips.  Then again, it may never happen at all.  

That's right, the temp sensor controls the choke, which is one of 
"things" (is map the right word?) I might want to change.

I will be happy to scan the manual.  I can't believe there is a whole 
lot of differences between the 3 units (2D, 4D, 4Di).  There must be a 
"Magic Box" we can make to program and view what's going on in the ECU.

In any case, it's still better then a carb.  :)

FEF
___________ Reply Separator _________________________________
Subject: Re: Projection
Author:  Michael J. Kupec [SMTP:mkupec at erols.com]  at MSXGATE
Date:    4/1/98 6:56 PM


Fredric,

I thought your name looked familiar. Nice to see fellow EB members here on
this list. I wasn't aware you were running a Projection on your EB. Anyway,
if you find out that the older analog stuff won't work on the new system,
let me know, I'd be interested in the parts.

You're right about the O2 setup for the 2D. The older system uses an add on
box that modifies the TPS signal to make the system either lean or richen
the injector flow. Neither the 2D or the analog has/had a MAP sensor. Both
just take the TPS and distributor pulses and use that to change the fuel
flow throught the injectors, crude, but it works. The 2D is simpler, just an
O2 and the wiring harness is all you need. Not sure if Holley use a heated
one or not though.  All the temp sensor is used for is for cold starting of
the engine. After the engine is at operating temp, the temp sensor is out of
the loop.

BTW what's the chance of you scanning in the manual and sending it to me?
Mostly I want to see what differences they did at the ECU plug. I'm thinking
I might be able to use a 2D whenever my analog system dies.

Anyone got the manual for the 4D/4Di? It'd be interesting see what I can do
with a 4's computer and the 2BBl TBI.

Michael J. Kupec
mkupec at erols.com

I live with constant fear and danger every day...
    and sometimes she lets me go four-wheeling!

Get in, Sit down, Shut up, and Hold on!

Management & Data Systems, Lockheed Martin Corporation
Woodbridge, Virginia, USA (703) 680-6903
1970 Bronco w/351W (in a constant state of dissassembly/refinement...)
1964 1/2 260 Convertible  w/PS, PB, & Power Top
1965 289 HP "K" Coupe w/PS, PB, & Pony Int. (Early '65, not a GT)

-----Original Message-----
From: Fitzgearld, Fredric <fredric.fitzgearld at intel.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>;
Bruce Plecan <nacelp at bright.net>
Date: Wednesday, April 01, 1998 8:30 PM
Subject: RE: Projection


>I'm pretty sure it's just like the old analog system with a temp sensor,
>trigger, TPS, and the possible addition of a O2 sensor.  It has the
>tuning pots like the old system.  I know this is a lot to ask for, but I
>would love to be able to program this unit via the PC, or something,
>then tune for altitude as needed.  I wouldn't even need to do that if I
>put a O2 sensor on it.
>
>The main reason I got the 2D system, instead of the 4Di system, is due
>to the lack of funds in the budget.  I know it's crude at best but the
>way I see it, any kind of FI is going to be better then the carb when
>changing altitudes a lot.  Changing jets and rods all the time stink.
>Not to mention the fact that FI will run upside down, an important part
>of rock crawling.
>
>FEF
>
>
>______________________________ Reply Separator
>_________________________________
>Subject: Projection
>Author:  Bruce Plecan [SMTP:nacelp at bright.net]  at MSXGATE
>Date:    4/1/98 2:02 PM
>
>
>Welp my catalog was outta date.  A new 2 barrel digitial design?.
>Does it have a MAP sensor?.
>Does it have a IAC, or just a throttle kicker?.
>Does it sit use the knobs for adjustments?.
>You happen to have the patent numbers?.
>Bruce
>