MPG Guage

[1987HondaAccord]

I'm not sure if anyone has done this, so i thought i would start a thread. I think i've seen one of these on my friend's IS300 a couple of years ago, and i was wondering how difficult it would be to hook something like that up.

i think it would take 3 guage readings. 1 would be the amount of fuel returned to the gas tank (assuming a constant amount is supplied) and the other would be the spedometer reading. but somehow you'd have to divide the speed by the fuel use rate.

any ideas?

[BlueBead]

You'd want to use a microprocessor like a PIC chip to input your signals to. From there it would do the calculations you needed and output a reading to a display device.
Best bet would be to find someone doing an electonics course and get them to do it for their project.

[Vanilla Sky]

i'm not exactly sure how the system works, but i'd be willing to try it out in my own car... i've always liked those things... mroe for the novelty, but i do kinda like to see if i can adjust my driving and gain some mileage