Edlebrock 3500 EFI system

[dzorde at aesprodata.com.au]

     Technically you can't copy it, but who's to know if you send a few 
     copies to people (scan and email).  I would love to see a copy if 
     possible.  Any mention what sort of HP can be expected from a 
     reasonably stock 350 with extractors and a mild cam when this system 
     is fitted ?
     
     Dan        dzorde at aesprodata.com.au


______________________________ Reply Separator _________________________________
Subject: Edlebrock 3500 EFI system
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    6/18/96 1:22 PM


Hello,
A new Edelbrock 3500 EFI system is on my bench awaiting installation in 
my truck. I could collect some information from the mechanical hardware 
before installation. Any requests? I have some dimensional measuring 
equipmen
t. Edelbrock tech support said the injectors are inclined 55 degrees 
from horizontal and the air manifold is derived from the Victor Jr. 
Any requests for information from the manuals? The manuals are 
copywrited, can I distribute or post copies for non-commercial 
purposes?
     
The installation manual is good. It could be most helpful to a DIY 
project.
     
The Owners manual gives Edelbrock, GM and Bosch part numbers for parts. 
Many graphs describe the fuel, spark, vacuum, and RPM data used for the 
350 SBC and how the data varies with different cams.  Charts describe 
factors
 needed to change the data for differing displacements, exhaust systems 
and valve sizes. The control pendant has a about a two line by 24 
charactor display. Consequently, all data is either numeric or short 
bar graph. Man
y flow charts describe sequences of reading and changing data points. 
The text describes of  EFI system operation, engine operation modes and 
requirements for reliable engine operation. Typical adjustment and 
effects of a
re well described.
In short, I believe the manuals should be used as guides to people 
doing the:
interface program for the EFI332
basic operating data used for first run of an engine with EFI332
text for troubleshooting, installation, adaption, first operation and TUNING 
The distributor adaption is includes defeating advance mechanisms and 
addition of the hall effect device and  shutter blade unit. One shutter 
blade is narrow for sensing of cylinder one timing; ten degrees BTDC 
static tim
ing and cylinder one reference are needed for sequential injector 
pulses. Perhaps this scheme is common, but new to me and perhaps 
applicable to crankshaft mounted sensors. 60 teeth, including one 
narrow tooth? Injection 
duration is a user variable. Injector timing is not user variable, and 
is controlled for best fuel vaporization. Ignition timing is a user 
variable, coil saturation is not.
     
Edelbrock had a bad (expensive) customer support experience with a 
previous fuel system and will not sell partial systems nor support 
systems adapted to extreme or non-SBC engines. They refused to sell me 
fuel rails, air 
manifold or throttle valve, one or all.
Except that the 68HC11 based system doesnt do spark knock detection, I 
am happy with it. Will write notes as I install and tune. Maybe my 
opinion of the system will change. 
The mechanical parts will be used again with the EFI332. For $1780 I 
have a (to be) complete working high performance EFI system into which 
the EFI332 can be connected.
     
Eric