Quote:
Originally Posted by 67ChevyRedneck
Anyone getting 25-28mpg (in US measurement) with a TBI is completely full of crap. I don't know the converstion, but I know the Canadian gallon is bigger than the US gallon, even so, that seems high. 10-13mpg "city" is just about normal for ANY full size truck with a small block V-8 with just about any trans/rear end combo. The big difference is highway.
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Not true. My parents '91 Firebird, with a 305, auto and TBI routinely got 28mph highway and the best they did on a long trip was 32mpg. This was cruise control set at 65mph on a long, flat streach of freeway.
Biggest advantage of the Firebird is that is was very aerodynamic, unlike our bricks (or most any) of a truck.
I had a program at one time that would tell you how much power it took, at what speed based on how much frontal area there was. It was amazing how much more power something like a truck took to push thru the air then a streamline car did. It was even more surprising as you went up in speed. Something like twice the speed took four times the power.