When "big" power came out in the late 60s, early 70s, everybody was trying to put a bigger radiator, like Peterbilt 359 and Freightliner Powerliner, that had the grill almost to the headlights. In the late 90s and into the 2000s, we have real big power, and yet our radiators seem smaller. My 379 had a 470 Detroit, which is a lot more hp than a 335, and the grill is smaller than a 359. Yet it never ran warm. And forget about the Aero trucks, with the tiny radiators.
How are we cooling them better with less?
Old big radiator trucks
Discussion in 'Ask An Owner Operator' started by Bean Jr., Feb 21, 2016.
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Efficiency in the motors is my guess
Dominick253 Thanks this. -
Great question..Good points too...
I'm guessing its within the newer valvetrains and ports....Manifolds and turbos are scientifically enhanced these days.. 195 degrees TODAY is standard isn't it? Years ago i got nervous anythng over 180-185 degreesBean Jr. Thanks this. -
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I can tell you my little 3 row T600 radiator did a very poor job of keeping temps under control as a 525 hp MBN and no better as 550 hp 6NZ. Maybe it was just that motor, which does run hot like that, but my feeling was 500+ hp in a T600 with typical cooling system was just too much. The radiator must be upgraded in a T600 with that much hp.
NightWind and Dominick253 Thank this. -
I don't know but was the fan on the front of the radiator in the old days like cars? Was the fan on the back but blowing on the radiator? Now days the fan helps pull the air through the radiator
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Maybe today's rads are thicker? I know copper is a good conductor but maybe these new aluminum tube and fin radiators are more efficient overall.
Bean Jr. Thanks this. -
Bean Jr. Thanks this.
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If I were ever in the market for a truck with a big rad, this would be it.
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