Math whizzes needed...

[gw33gp]

I agree GPS is not 100% precise but I have checked it many times against road markers and percent variation compared to the speedometer. I would say that my GPS is within +/- 1% of being accurate overall.

Calculating fuel mileage with this kind of accuracy should be good. It is very hard to get better accuracy that that in determining how much fuel was used.

 

[scooter]

And I'm concentrating on baking oatmeal cookies so my brain isn't on the math so much....

Richard

Mmmm cookies.......

Yes he geared it up (to go faster).

Edit: And of coarse it gets worse the faster i go. I know gps isnt perfect, but its all close enough for a mpg guesstamate. Lol

 

[RonD]

Not sure what size cable your speedo uses but you can buy gearing changers to compensate for whatever percentage, + or -, you need, they just hook onto the cable.

This company has them($62) but there are others as well
http://www.transmissioncenter.org/speedometer_gear_housing.htm

 

[scooter]

Not sure what size cable your speedo uses but you can buy gearing changers to compensate for whatever percentage, + or -, you need, they just hook onto the cable.

This company has them($62) but there are others as well
http://www.transmissioncenter.org/speedometer_gear_housing.htm

Im 99% sure its electronic..... Its a Allison 545 auto.
Ill go look here in a minute.

EDIT: Yes its electronic.

 

[RonD]

Dakota Digital makes a "Universal Speedometer Signal Interface".
If there is ABS on the vehicle then you need to change the pulse after they go to the ABS module.