Quote:
Originally Posted by darcane
I have it calibrated for mileage...
This last tank was off by less than a mile. The tank before, it was off by about 6 miles. The tank before was right on. If it was consistent, I could tune it out.
Differences in the tire due to wear over time will cause a deviation on the odomoter reading... but my dash and my UG will both have the same deviation as both are collecting data from the same signal.
Whatever the reason, it's only a small difference and doesn't affect the usefulness of the data.
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New tires at 44 psi= 1.0265 difference in odo vs gps.
20,000 mile tires at 50 psi= 1.0285 difference in odo vs gps.
My UG has read anywhere from .7 low to .7 high.
If it was consistently high/low I could then adjust the VE RPM value.
My onboard dash gauge reads from 1 to 4 mpg high and always high.