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Originally posted by WickedESi
If bank 1 is one wire from the megasquirt, and bank 2 is one wire, then "alternating" mode must mean it alternates squirts between bank 1 and bank 2.
Yes this is correct. But when its set to alternating, as far as I know, only one bank fires per engine revolution(360 degrees crank rotation). This means now, since we have 2 injectors connected to one MS driver, we are sending fuel to 2 cylinders per one engine revolution. We only have 2 intake events anyway, per one engine revolution.
Originally posted by WickedESi
Ok, now my point... Why in the world would you want to squirt 1&3 and then 2&4??? 1&4 follow the same pattern, as well as 2&3. So, you should have them squirt in the pairs 1&4 then 2&3. If you squirted 1&3 together, then cylinder 3 would be in combustion while cylinder 1 is in intake (the proper time to squirt).
Its not possible, according the 420a firing order, to have cylinder 3 in the combustion stroke, while cylinder 1 is at the intake stroke. If you think about it, cylinder 3 fires directly after cylinder 1, only 180 degrees apart(half crank rotaion). So with 4 strokes in one engine cycle, its not possible as the way you describe it. Going in order, lets say cylinder 1 is at TDC waiting for spark for the combustion stroke. Cylinder 3 will be at BDC, with the fresh air/fuel charge ready for compression. Taking a step back, this means that cylinder 3 recieved an intake charge 180 degrees after cylinder 1 did. So this is why you would really want to fire injectors 1&3 together, since both cylinders are getting fuel only 180 degrees apart, or half of one crank rotation. Make sense? 
13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
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-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)
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