- Mon Nov 09, 2020 3:44 pm
#46312
As much of this is unique to your setup, and you need to not only wrap your head around it but know the real-world effects involved in your specific setup; I suggest (IMO) plugging a pair of injectors above your carb throat or in the air filter housing (F1-style down-throat injection), shut off your carb fuel, and do some tests. It's the simplest and easiest first-step, and what you learn in a couple days should go far in guiding you to the better direction. Just ideas, and that's entirely up to you. Good luck!
Jcrotts wrote: ↑Mon Nov 09, 2020 2:26 am It's a flat plane crank so each "event" should be 180 degrees after the previous one. If I could fire 1 injector off 2 channels it might work. …That would depend on which scheme you are choosing. If you plan to offset the injections on 2 cylinders, then I'd look at INJ1 injector (1&4) firing "on-time", and INJ2 firing one injector (2&3) offset. Offset injection will be touchy, as the induction is overlapped. This is the prime issue with Siamese setups, and why alternative options are considered. Some have gone so far as to construct independent-runner tubular manifolds with port dividers in order to side-step the issues inherent with timed Siamese fuel delivery, versus constant-flow systems such as carbs and mechanical injection, as even those are not perfectly balanced. Hence, other options for deep-port (relatively isolated fuel) or TBI (fully-shared fuel).
Jcrotts wrote: ↑Mon Nov 09, 2020 2:26 am… Is it possible to run 1 injector off 2 channels without seeing the magic blue smoke?No blue smoke worries, but your fuel delivery signals will overlap, botching your actual-vs-calculated fuel flow. If the overlap were consistent, then it would be doable, but overlap charge stealing varies with speed and load. With typical injector sizing and flows it's not an option.
As much of this is unique to your setup, and you need to not only wrap your head around it but know the real-world effects involved in your specific setup; I suggest (IMO) plugging a pair of injectors above your carb throat or in the air filter housing (F1-style down-throat injection), shut off your carb fuel, and do some tests. It's the simplest and easiest first-step, and what you learn in a couple days should go far in guiding you to the better direction. Just ideas, and that's entirely up to you. Good luck!
-= If it was easy, everyone would do it =-