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It would appear the MAN diesel and Cummins are saying close to the same thing.
Man diesel was claiming air temps lower than 30'F to 40'F hurt fuel milage and cummins recomends staying above 20'F.
I knew cool air was good to a point, but never new what those numbers could be till now.
Cool air above 40'F and intake harmonics are the way to go.
Cold air intakes are good more often than not, just have to keep the air going into the enigne after the intercooler above 40'F.
I have a -40'C to +40'C temperature probe on order to put down in the intake manifold to get some real numbers.
I have the problem of 0'F temperatures in winter here.
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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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