Chris -
Quote:
Originally Posted by Chris D.
how does a scanguage give you accurate fuel used data? does it know the size of your fuel tank, your injector pulse rates, voltage to the pump, regulator settings?
I dont see how it could be any more accurate than anything else..
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I agree, so I don't use the SG for reporting my MPG. I use the GPS adjusted odometer and multiple tank fill-ups for my fuel log. The SG has a "cheat bias" that you use to calibrate fill-ups. If you change the way you drive between fill-ups, or you're driving context changes, there is the possibility that the cheat bias would lose validity between fill-ups.
The SG requires that you input the size of the engine in liters, a speed adjustment based on non-OEM tire size changes, and the tank size.
From what I can tell, the SG does not know about injector pulses, 02 sensors, or fuel trim. If it did, I would expect it to
report that data in the instant gauges, but it doesn't.
I only trust long term MPG, so I look at my MPG over 90 day fill-ups. The problem with my methodology is that is is harder for me to claim improvement of mods that have
small effects on MPG.
I think the SG is a fantastic *relative* MPG barometer. With all else being equal, it can tell you that you are increasing or decreasing MPG consumption.
CarloSW2