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JCD06, I am interested in what you are doing as well. I am a hobbyist that likes to think "outside of the box". I am looking into using a Whipple 5.0L supercharger and have thought the same things about the bypass valve. Naturally their solution is vacuum based (cheapest/easiest solution)...

Well that just about covers all of them. My plan is the same thing. Too difficult to try and get 120+lb injectors to act right idling through town. The factory PCM has all the part throttle stuff down perfectly and the aftermarket one is a dream when it comes to on boost fuel delivery. Let...

In the aftermarket world look at the Big Stuff 3. It has the ability to control 16 injectors and in a V-8 or less provide staged injection. Once the first stage hits 80% duty cycle (or whatever you decide) the second set picks up the slack.

Thanks TurboXS, Plan on keeping the factory PCM including it's O2 sensors for the first stage of injection (as the master). Then use the second PCM to handle the second stage of injectors and PWM devices with wideband 02's. I guess the only thing to do is to try it and see what sensors are...

Only one PCM would be used for the reference voltage since both use 5vdc as a reference. I do agree that having both of the PCM's monitoring the same line could introduce more impedance. If the change is low then it would not matter (engine is 180 but PCM's see 178) however if it is an extreme...

I am trying to find out if it is possible to share sensors between two PCM's. I don't think there will be a problem with the Crank/Cam position sensors since all is required from the pcm is to see the rising or falling voltages. But what about the TPS or other sensors that use a reference...