Originally Posted by Mustang65
It all depends on who is driving...snip...
My 1969 Olds 442/W30 got 5 mpg (max) going down hill and a strong wind pushing me. ... snip ...
When I put in larger injectors, I expected my mileage to drop. It didn't. Probably because I was, and still am, easy on the throttle. When you think about it, it takes a given amount of energy to move down the road. My new injectors have the capability
to supply more fuel and faster than before, but at less than full throttle my throttle position was supplying the same amount of fuel (energy) as before. Only the throttle position was different.
BUT, my factory, on-board computer said my fuel mileage had increased - a lot - with the larger injectors! From ~20mpg to ~27mpg. I was on cloud nine, until I fueled up. No mpg change! Then it dawned on me that the computer wasn't measuring actual fuel used, but how much fuel the computer thought
(hmmm.. maybe computed
is a better word) was being used based on the fuel stock injectors supplied at various throttle positions.
(BTW, my 1969 Camaro Z28 got .... sorry... I can't recall what the mpg was. Didn't care.