Neous
Veteran Member
this is my first fill so I don't expect tank accuracy to be correct but while my speedometer shows that I'm doing 70 mph the scangauge show that I'm doing 66 mph
Sip'n,Sip'n Diesel said:Neous - on your next top off (you do vent all the way to the brim, right?) you will be entering a "consumption correction percentage" or somesuch, along with the price per gallon you paid. this is where the calibration (for MPG) can get too sensitive, or not sensitive enough. I'll assume you are familiar with how it works, it's pretty self-explanitory
now, here's my tip on adjusting that percentage: if your SGII "thinks" you used 9.50 gallons (for example) but you actually top off with 10.0 gallons (measured by the pump) then don't tell SGII you pumped 10.0. instead tell it 9.60, 9.70, 9.80, or 9.90 and after several tanks it should be getting closer and closer to being accurate
for awhile I would tell it exactly what I was doing, but it seemed that it would over-correct even though it had the "real" numbers. for example: if it thought I used 9.50 gallons and I actually topped off with 10.0 then I would tell it I pumped 10.0. logical, right? you would think this is more accurate, but in my experience it is not. I've gotten more accurate results by "lying" the the SGII than being "honest" with it. over time the results are more and more consistent, usually accurate to within one-tenth of a gallon +/-
on 2 occasions the SGII has accurately hit the number to the one-hundrendth of a gallon. for example: SGII thought I used 9.28 gallons and I actually pumped 9.280
I use a "speed correction factor" (or whatever they call it) of 3 IIRC. either 2 or 3 seem to be accurate to within 0.5% on the MKIV VWs
due to the speedo correction, the distances traveled won't match perfectly. for example: on a 700 mile tank (dash tripodometer) my SGII will think I traveled 695 miles +/-
IMHO it's not really a huge problem since @ 50 MPG, 5 miles is a discrepancy of "only" 0.10 gallons. also, I occasionally treat a tank with ~5.5 oz of PowerService which (I think) is a good amount to blend for 17 gallons. so, they kinda cancel each other out on tank averages
have you tried tweaking with any of the X-gauges yet? so far I've only added an X-gauge for the "current trip average MPG" and horsepower
GPS is for what every you want. I use my hand held unit on sailboat deliveries and racing, my avon for fishing and other stuff, on my XR600R, in my automobiles, and as a hand held unit when hiking.Waterfrontray said:I go by a digital speed board every morning and it reads 45MPH when my Speedo says 48 - 50MPH. No GPS on the car. GPSs are for boats.... Stock wheels and tires...
Maybe you have the older firmware version (lower than v3.15) that doee not have price of fuel nor xGauge features... may need to ship it in to Linear Logic to get the upgrade. Click menu, more, more, more until you get to "version".jettawreck said:Sip'n,
Agree 100% w/above info...except what about the part of "entering in the price per gallon paid". How/where in SGII do you do that? I've happily had mine for a year or more and never done that, but then I haven't gotten into xgauge features if it's in there. So much to learn...