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Cold air gives better power and fuel economy on diesel.
On a gas engine cold air gives more power and typically less power.
And you can control the intake air temperature.
Of course any one trying to sell you a cold air intake is going to tell you there is no negative side effects.
Typically, not always, cold air reduces 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.
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