Quote:
Originally Posted by Tulok
There are plenty of reports of people taking their time to tune a CARBURETOR on their BIG BLOCK in a '55 Chevy getting 25MPG on the freeway at cruise with an overdrive. many of these cars have 7000-8500cc engines, 400-650 horsepower and can do 0-60 in 3 -4 seconds.
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My 1985 suburban with 7.4L engine, non-lockup 3 speed auto and 4.11 gears was getting upwards of 20mpg with a lean carb tune on an edelbrock 650 using my AEM wide band O2 meter.
The 2015 suburbans with aerodynamics, smaller 6L engine, over drive transmission with lockup converter and electronic fuel injection barely get 20mpg.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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