Definition: The delay beteween when the injector driver
fires and when the injector actually starts to open
Platform:
Min Value:
Max Value:
Description:
Hints: If this value is too low, the actual pw will be
slightly shorter than commanded across the board and you'll run slightly
lean, if it is too long, it effectively increases the pw and you'll be
slightly rich. The offset varies with battery voltage because at lower
voltages the injectors take longer to respond.
The EEC uses this to compensate for the injector open and close time. The amount of time it takes the injector to open and close varies by the amount of voltage available to drive the injector.
The offset vs batt voltage should be good for most injectors, but if you want to adjust it then use the original injector size / new injector size ratio.
19.64 / 42.1 = ~0.45 now multiply the Y value of the batt offset function by 0.45.......
Injectors offset examples
For breakpoint the pulsewidth in ms is just a conversion. My breakpoint
is .000025004 lbs. or 2.5004e-5 lbs. My 30 lb injectors deliver (30
lb/hr)/3,600,000 ms/hr = 8.33e-6 lb/ms. Therefore my breakpoint in
ms is 2.5004e-5 lbs/(8.3333e-6 lbs/ms) = or 3.0005 ms. If you can
figure out at what ms value the breakpoint needs to be (only way to do
this is graphing KAMRF vs. PW) you can use this conversion to determine
the lbs value for the breakpoint.
Brian