View Single Post
Old 08-15-2014, 10:04 PM   #4
TJ's Chevy
Post Whore
 
TJ's Chevy's Avatar
 
Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,400
Re: C30 with 250/SM420/4.10 gears MPG/fuel economy results

That's not bad considering...a 292 would probably get as bad or a whopping 1 mpg better only cause its a little bigger...less engine stress...dump an ol 5 speed GM trans...oh what was it...Spicer 5 speed? That'd give you another gear. lol Something like .76 OD I think...not sure..it was on that GM heritage site. Not sure what the 292 in my C-10 gets...Wonder if the mileage increased a tad with the 4 barrel, headers, an HEI...they say it should get around 16-18 with those mods...but who knows. lol! Put a turbo on that 250..then when you WOT it from a stop light you be up to speed so fast you will have hardly used up any fuel.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643
1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056
My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw
TJ's Chevy is offline   Reply With Quote