[Diy_efi] New guy on board - and my personal DIY project

[Steven P. Donegan]

I just joined the list today. I am assisting a friend in building an EFI
setup for an old V4 SAAB, am building one from scratch for my
supercharged Mustang (1985 vintage) and am designing one from scratch to
'fool' the stock ECM in my 1998 LS1 Camaro to do what I want it to do.

The last project is one that may interest you. As of this AM I sent a
PCB fab order for 20 prototypes for my first piece of the design. The
little 3 inch by 1.5 inch board collects wideband O2 data, GM MAF
(frequency based) data, and 4 other optional Analog inputs, has a little
20 MIPS microcontroller on it, and if you tell it a goal it reads the
MAF/O2, determines how much to adjust the signal, and lies to the stock
ECM - i.e. if you set 15.7:1 AFR as a goal (economy) the unit reads the
MAF gms/sec frequency and the O2 sensor and adjusts it's MAF output
frequency to the ECM to fool it into leaning the mixture appropriately.

It will shortly read the MAP sensor and do the equivalent lying to the
ECM - as the stock ECM cross checks sensor data to detect errors.

This is just the first little board in a distributed computing ECM
design that can be used as a stand-alone (like a Megasquirt) or to make
a stock ECM do what you want it to do.

Very fun to be able to enjoy my motorhead, electronics, engineering and
programming skills/hobbies all at the same time.
-- 
"Each new law makes only a single guarantee. It will create new
criminals."-- John Tandervold