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I should add that low rpms are not the magic key to high fuel economy. I find older 2wd nissan titan have pretty tall high way gears for a truck. Typically turning around 1600rpm at 70mph and still delivering pretty typical pickup truck fuel economy.
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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.
Last edited by oil pan 4; 08-19-2016 at 11:38 AM..
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