Quote:
Originally Posted by 83gs1100g
hey guys thanks for the help!
dont quite on me now! please respond!
maybe i was thinking this wrong after all maybe not? please bear with me on this.
is vx and hx operate the exact same? from idle to what ever rpm its in 12v mode?(i understand when it hits crossover rpm and goes to 16v mode)
so what happens to a vx if its already in 12v mode and it goes into lean burn? i thought that was what it did when going into lean burn?
so does the hx go into lean burn like the vx?
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Yes, they are activated in the same manner. They both start 12V and the vtec solenoid kicks in 16V. It is a mechanical activation by the solenoid that opens an oil passage way and the pressure activates the pins in the valvetrain to lock in the 16V.
Lean burn is software controlled that will change the air fuel ratio from stoic, i.e. 14.7:1 ,... to honda's lean burn which I've read is above 22:1. This lean burn mode will only kick in when certain requirements are met,.. i.e. car is up to temp, no CEL, in 12V mode, engine load is below a certain amount,.. and others.
Yes the HX also has lean burn, but from what I read the Cali version ECU will not go into lean burn as much as Fed version due to the cali smog requirements.