MP 360 overheats no matter what i do

Ccas said

I think something more is going on but a 3 row aluminum radiator is very inefficient. 'big' 2 row is about 20% more efficient.
Published HP ratings are total bull. We've had 1000 hp cars that are fine with small radiators and 400hp cars that need very big radiators. Way too many factors for a company to publish a HP range as the method to decide what radiator a motor needs.

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Over generalize much?

A 3 row radiator is not “very inefficient”. Is the 3rd row generally less efficient than the first two? Sure, in general. But the design of the radiator, size and shape of the tubes, spacing between the tubes etc all play a part in that efficiency. There are three row radiators out there that will outperform two row radiators, and two row radiators that will outperform 3. There’s a heck of a lot more to it than just 2 vs 3 rows in the core, so you can’t just throw out blanket “20% more efficient” claim either. That’s as much nonsense as a horsepower rating calculated by the manufacturer.

And I run a Champion 3 core 26” radiator in my Duster with a 400-ish hp 340 that’s punched out .060” and have never had a problem with it overheating. Quite the opposite, it’s managed just fine even stuck in traffic when it’s 110*F outside. Usually the the dual electric Contour fan set up I run stays on low speed, I’ve only ever had the high speed kick on a couple times.