ULTM8Z

I'm having way too much fun with this Tunerpro stuff...

Maybe some folks recall my mpg calculator earlier based on a snapshot in time of looking at my scanner while on the highway...

https://www.thirdgen.org/forums/diy-...alculator.html

This time I generated a trip average mpg calculator spreadsheet. Amazing how accurate it is...

Inputs => Tunerpro datalog export of engine rpm, injector pulse width, and vehicle speed for each data sample. Also, known injector flow rate.

I drove into work (~25 minutes) and got ~16,000 samples. Pretty much pure highway driving.

Basically for each data sample, it calculates the instantaneous mpg. It'll then average all the instantaneous mpg's into the trip average.

My latest highway run after getting my VE's dialed in with my VE auto-tune yielded 23.3 mpg. I know I've verified 23 mpg in the past with the traditional method of recording mileage and # of gallons on next fill up. I don't know how you get more accurate than that!

As with my auto VE tune, there's the issue of corrupted samples due to ALDL datastream drop outs, so I have to post-process the .csv data export to get rid of those samples first (like data showing that I was going 852 mph or engine spinning at 12,322 rpm ). But once it's all cleaned up, I get excellent results!!