EEC-IV Modifying

[Ord Millar]

I know a lot of guys running EEC-IV's with boosted 302 applications, and
NONE of them read boost pressure into the EEC, they either use fuel
management units to increase fuel rail pressure with boost (usually 6:1 or
8:1), or else they program assuming boost vs. RPM is a table of constants.
These methods seem to work OK.

You could also look into the APE Speed-Brain, which connects to the standard
302-EEC IV wiring harness, but is allegedly easier to program.

There is the 7.3L Turbo Diesel truck engine, I believe they used EEC-IV
prior to 1995.  I don't know how much help a diesel calibratipon starting
point will be, however.

BTW, a company called alternative auto will modify EEC-IVs for low impedance
injectors, and their price seemed reasonable, so it can't be too difficult.

-----Original Message-----
From: Bruce Plecan <nacelp at bright.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Sunday, April 11, 1999 10:41 AM
Subject: Re: EEC-IV Modifying


>
>----- Original Message -----
>From: Paul S. Draper <psd105 at psu.edu>
>To: <diy_efi at efi332.eng.ohio-state.edu>
>Sent: Sunday, April 11, 1999 7:30 AM
>Subject: EEC-IV Modifying
>
>Before deciding on ecms, is there a T/C  S/C  ford application (perferably
>correct number of cylinders)?.
>Be a shame to do a bunch of work and find out the system doesn't see Boost.
>Does the ecm look for a barometric value?.
>I don't know about fords strategy on stuff is why I ask.
>Bruce
>
>
>> Hi all,
>>
>> I've recently decided that I want to switch my 1969 Mustang Twin Turbo
302
>> project from carb to efi.  The catch is, that I want to do it as cheap as
>> possible.  This means using stock Ford EEC-IV stuff.  My only problem is
>that I
>> want to use Low Impedance Injectors(2.2-2.4 ohms) with an EEC that was
>> originally designed to used High Impedance injectors (~14.50 ohms).  I
>know
>> that I just can't switch injectors without killing components within the
>EEC.
>> I have searched through the archives and have found a little bit of
>information
>> on this, but after looking at an EEC schematic I found on an FTP site,
I'm
>a
>> little confused.  The information I read in the archives from Dan Malek
>stated
>> that the Switching Transistors, Zener Diodes, and Heat sinks need to be
>> changed.  But, I didn't see any transistors used for the injectors on the
>> schematic, maybe I'm looking at the wrong schematic?  The part number on
>it is
>> XSK-E7RF-3451-A1.  That part number says that it's for a 1987 Ford, and
by
>> looking at the schematic it looks like it's from a Speed Density
>application.
>> What do I need to switch to make this work?
>>
>> If anybody can help me with this I'd greatly appriciate it.  Also, for
>those of
>> you looking for Ford Injector Flow Ratings I have compiled a table on my
>site
>> with this information.  If you have anything to add, correct, or if you
>know
>> where I can find more info, please let me know.  The page can be found by
>> following the the link to my site in my sig line, and clicking on the OEM
>fuel
>> system components link on my front page.
>>
>> Thanks,
>>
>> Paul
>> --
>> Paul S. Draper
>> psd105 at psu.edu
>> 1969 Mustang 302 Twin Turbo Project
>> http://www.geocities.com/motorcity/factory/9893
>>
>>
>
>