Quote:
Originally Posted by Señor Gar
Time to move Fuggin R&D up into the snow belt  .
Doug, do you have any theories as to why the VT1300CX motor is running with a shortened (16° less) power stroke on the rear cylinder; i.e. retarded ignition and advaced exhaust  I speculate that it has something to do with the uneven firing of the single crank pin design and compensation for the shorter rear exhaust pipe. |
Gar,
To tell you the truth I am not sure why Honda does it this way. What I do know is Honda’s PGM-FI system is adjusting based on the engine speed and throttle. The ECU is adjusting the motor based on the intake-port pressure, engine-coolant temperature, intake-air temperature and atmospheric pressure. All this takes place a number of times per second. The motor itself is adjusting fuel, timing and firing along with all the sensing that’s going on. Honda’s design engineers have always done some different things with timing and valves to create a more efficient and emission friendly motor. I think this is one way they are trying to do so. The only way we are going to know what motor is doing with all the adjusting is to get the ECU codes and 3-D ignition mapping. If you get that information let me know, I would like to break it down.
