new scangauge 2 came in the mail

[doless]

So based on the real distance traveled and the scangauge recorded distance traveled I have to calibrate it based on the difference percentage?

[MetroMPG]

Yup.

EG: let's say you drive a 11 mile verified route (checked with GPS, or one of the other methods Niel mentioned). If the SG says you went 10 miles, you now have to change the SG's "Speed" value to match reality.

You need to increase it, so you know you're dealing with a positive calibration.

There's a 1 mile difference between reality and the SG.

1 actual mile / 10 indicated miles = 10% difference

So you'd enter +10% as the Speed correction.

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I had to adjust the Speed value in my "Winter beater" '07 Civic because I increased the tire size (to increase gearing). That caused the car's speedometer/odo to read lower than actual, so now I'm running a +6% adjustment in the SG.

[doless]

got it, i'll route my way to the gym this evening with google maps and check the distance traveled in comparison after i get there. This thing is pretty cool for the money.

[CigaR007]

After each tank fillup, do not adjust the % to the correct value (amount of fuel pumped) right away.

Basically you would calibrate the fuel value by only 50% of the variation. This will make the calibration process quicker since the scangauge will tend to overshoot less around the set point or the desired, calibrated value.

Also, try to use the same gas pump at each fillup for more accuracy.

[doless]

Alright so I tracked some distance with a app on my phone that measured it with my gos (assuming it's accurate) it said I went 8.388 miles and the sg read it as 8.5. That seems pretty accurate. Any calibration needed? I still haven't gotten to fill the tank yet, hopefully doing that this weekend.