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Old 08-21-2016, 02:44 PM   #72 (permalink)
oil pan 4
EV convert
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Join Date: Jul 2011
Location: NewMexico (USA)
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Sub - '84 Chevy Diesel Suburban C10
90 day: 19.5 mpg (US)

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Water to air coolers never preform better than air to air.
With air to air you can only ever cool the air down close to to ambient.
With air to water you can only cool the water down close to ambient and then cool the air down close to the temperature of the water.
Air to water systems also suffer from real bad heat soak.
About the only reason to run air to water is if you just don't have room for air to air.

You are wasing your time trying warm air with a cummins.
1 it has already been tried on here and confirmed.
2 the cummins engine manual says their eninges are going to get lower fuel economy and reduced power with warm air.

If you want something that will benifet from warm air get a gasser.
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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