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Message: <blockquote data-quote="New recaros" data-source="post: 1823146" data-attributes="member: 33856">Once the thermostat is wide open, no matter the set temp, your system is at 100%. Only adding more air flow or cooler air to the radiator will drop the outlet temperature of the radiator. Or you can reduced the engine load and create less heat.  The set points your adjusting makes the system go to this 100% capacity sooner but does not provide increased cooling. Once you reach 100%, increased engine load equates to increased engine and cooling system temperature.Maybe this might help, your cooling system has a fixed amount of cooling capacity, it is sized for near max engine load. The thermostat is only there for low load conditions so you’re engine does not run to cold. Increasing water flow helps sometimes but it is because of velocity and better washing of the wetted surfaces in the engine. What happens in this case, the outlet water from the engine is hotter which enters the radiator hotter and outlet of the radiator is also hotter. This increase outlet temp happens because the velocity has increased and residence time inside the radiator drops. Remember the capacity or btu removal capacity of the radiator is already maxed out. Changing the thermostat and fans can really help on short term loads like off roading, but on long sustained loads as you described, you will not get the results you are looking for. Like I said, if the thermostat is less restrictive it may lower your temp a bit from increased water flow.I hate tune-ups in a can, but anti foam really helps. Engine Ice, Redline water wetter, VP cooldown. These are all silicone antifoamers. I use the VP cooldown. What you’re talking about doing should not hurt anything and it’s cheap, so try it. I can see some nice gains under normal driving, but not sustained heavy loads.</blockquote>

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