[Vash]

Originally Posted by illumina

Much to my chagrin, there will be no hacking of the Cadillac ECM. Rockcrawl has pretty much set me strait on this issue from an email today.

That said, there are currently four options that I am will to try:

a.) Megasquirt (MS) fuel system. I would use this system to run two TBI injectors in reference to boost. There will basically be an extra fuel pump, feed line, and return line feeding the TBI system for auxiliary fuel supply. Because the MS system reads over 2 bars, fuel wouldn't come on until boost is being made if I so choose...

b.) 454 TBI setup. Tom, I would like to know exactly how to power the injectors and what parts I need to make this work. Please let me know because I cannot find the information you gave me a while back...

For both of the above systems, I will have to adapt the throttle position sensor from the current 4.9 liter setup to work with the TBI setup. It's all a matter of tuning then.

c.) Another ECM that will read boost. This will be especially difficult because of the Cadillac BCM will not be able to function without the stock ECM...

d.) MSD fuel management unit. This device gives extra voltage to the fuel pump, which in turn overdrives the injectors. Along with higher flow injectors and a rising-rate fuel pressure regulator, this is an option. The thing about this setup is the lack of tuning that can be done...

Please feel free to give any extra options if there are any...

You may want to look into the AEM F/IC-8 (Fuel / Ignition Controller) as an option.