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Lean burn was good for another +20% for me.
I would expect up to +20% from a fairly radical gear change from 4.11 to 3.21, what I have in store for the suburban or from 3.73 to 3:1 or 3.25 to 1 for the firebird.
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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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