SV: auxiliary fuel control that modifies factory ECM pulse widths

[espen hilde]

Racelogic clames:FORD EEC4/EEC5
Ford have always used a complicated chip to control their engines, and this 
chip is unique to Ford. Racelogic have cracked this chip, and can supply 
units to read out the original information, and adapters to allow normal 
eproms to be used on the target vehicle. The software supplied with the 
unit allows the contents of the chip to be altered. This can be done either 
using numerical format or a 3D graphical format. Usually the maps are 
located by using the graphical format, and then changes made in the 
numerical display. An demo version of the software can be downloaded by 
clicking this link <map6.zip>

http://www.racelogic.co.uk/emulator.htm

Espen

Shirley, Mark R [SMTP:MarkRShirley at eaton.com] skrev 22. mars 2001 16:26:
> I'd be interested to see what this EEC-Tuner is.  I have a SD Ford that
> I have never been able to find a module for, but I do have the Tables as
> a 'government' document.  Also, I don't believe changing the displacement
> will have desirable effects on non-boosted VE/RPM/MAP points.  I think
> you'll
> find it's much too rich.  Whether the O2 trim can take it out or not is
> debatable.
>
> -----Original Message-----
> From: Raymond Brantley [mailto:raymond at iwantperformance.net]
> Sent: Thursday, March 22, 2001 9:39 AM
> To: diy_efi at diy-efi.org
> Subject: RE: auxiliary fuel control that modifies factory ECM pulse
> widths
>
>
> Jason, I'm going to assume your tuning a GM :>) But I am tuning a 
Vortech'd
> speed density Ford Lightning (EEC-IV and EEC-Tuner) and wrestling with 
the
> same problem. My load/VE is 99% around 10lbs of boost. The VE lookup 
tables
> can only go to .999 (based off a stock displacement of 351cid) so it goes
> extremely lean under boost. What I am hoping to do is change the engine
> displacement multiplier (the Ford code is funky for S/D displacement, 
long
> story) to a larger number in hopes that will equate to a larger 
displacement
> engine. So when the PCM references the VE table and calculates airflow at
> 99% VE for a 451 (or whatever, I haven't calculated what CID a 351 at 10lbs 
is)
> pulsewidths will be longer. I may be waaaay off and I hope the more
> experienced on the list will comment :>)
>
> The easy way is to edit the fuel tables (heavily), but I really want to 
see
> if I can do it via engine displacement.
>
>
> Thanks,
> Raymond
>
>
>
>
> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Jason R. Haines
> Sent: Thursday, March 22, 2001 7:48 AM
> To: diy_efi at diy-efi.org
> Subject: Re: auxiliary fuel control that modifies factory ECM pulse
> widths
>
>
>
> Thanks for the links. The Chipstar system looks like it works like the
> Dastek Unichip system someone else posted. Both systems take in the 
factory
> sensors and modify the signals to allow tuning the engine management 
system
> (without having to change the factory tuning). The problem is we already
> have calibration capability in the factory ECM so we can make many of 
those
> changes already. The bigger problem is that we are already at basically
> 100+% VE at 5 volts input for the MAP sensor (the engine we are working 
on
> is a speed density system) so you can't fool the computer into adding any
> more fuel than it already is. We need something that goes between the ECM
> and the injectors and increases the duty cycle based on auxiliary inputs 
(in
> our case a boost or 3 bar MAP input).
>
> I spoke with a Dastek distributor and the Unichip can do what we need but
> because we are running a V8 sequential system we would need 8 of their
> devices (they claim to use them between the ECM and the injector on 
single
> injector TBI applications).
>
> Jason
>
>
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>
> 
------------------------------------------------------------------------  
----
> To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the 
quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> 
------------------------------------------------------------------------  
----
> To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the 
quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> 
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org