Thank you for a wonderful post.
I'm glad that somebody here is not only friendly toward this idea, but has actually had some serious experience making it work.
You may not have noticed, but one of the links I posted offers a box that comes between the controllers and the injectors, and seems to either fool the ECM or reprogram the injectors to turn on longer. Thats what the $500 bucks is essentially for, and the claim is that this box allows you to use ANY mixture of gas/alcohol. (E5-E85).
Now I am very curious about your alternate suggestion, because I want to know if its even cheaper to just replace the injectors:
You said:
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You may also need to either reprogram the PCM or change to injectors with a higher flow rating so the stock programming can satisfy the OČ sensors within the maximum allowable (programmed) injector pulse width.
I found that changing from 16.8 PPH to 19 PPH injectors was more than sufficient to end the constant P0171 (lean exhaust) error codes I would generate at almost every run cycle.
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This seems to suggest that I can skip the 'magic box' entirely with better (bigger) injectors.
Now I have two important questions:
(1) on my /94 3.4L DOHC v6, I think I have 3 (or 6) injectors... Are these what you replaced? or are the injectors on my engine actually big enough already? How can I find out what they can do?
(2) Where did you buy your replacement injectors, and what was the cost? Was it a kit? What else had to be changed in switching over? Can you give me a guesstimate for the total cost?
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Similar results can be achieved through increasing fuel pressure by altering the fuel pressure regulator. So long as the OČ sensors do not achieve too high a signal and produce sufficient crosscounts while the PCM does not have to pulse them longer than the allowable maximum, the PCM should not set any error lean codes.
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Here you suggest another approach: a bigger or better (or differently adjusted) fuel pressure regulator. This I assume would push the gas through the injectors faster, although I don't see how they would then perform optimally...
Can you suggest any dangers or drawbacks for this approach? And again, how would I source a more powerful fuel pump / higher pressure, or intelligently adjust the fuel pressure regulator? Would this increase its failure rate/ duty cycle?
Thank you for your time and experience!