Cooling issue on highway

SlantedDart said
No **** lol all I really wanted to know if the air flow was blocked on the freeway with the electric fan on.. update. I did add an air damn that helped level out the temp at 193 in the city.. didn’t try it on the freeway yet…

Side note.. all the guys saying to run a mechanical fan.. I can’t no provision for a mechanical fan on a gen three hemi..

Second I know your rock stock 2020 hemi challenger runs at 220. They do this for emissions. Everything gets hot and thin and spins faster. ( almost to thin) for emissions. No other reason for it! This engine is NOT stock and in a totally different car. 190-195 is my happy spot. Air flow is the current issue. The 318 in here did the same thing.. along with the slant 6. I believe air flow is not evacuating down under the car. It’s getting trapped, the whole engine bay is cylinder head and there’s not really a way for air to come through and escape is my theory. Going to get a core support to hood seal( don’t have one)

Some YT video I watched recently about Gen 3 Hemis mentioned that even stock they put out a lot of heat and thermal management can be tricky. So I'd reckon it's not abnormal for yours to be running on the hot side and having a tough time keeping it cool.

The only way I can see an air dam helping in city driving is if the fan was recirculating hot air from the engine bay around the bottom instead of cool air through the grill? Strange that it helped but if it works...

Core support to hood seal is a good idea too. Reminds me I need to put one back on my car, old one was in bad shape and I just pulled it off and threw it out.

I thought trucks still used mechanical fans but just did a quick search for 'Ram 1500 radiator fan' and the results were electric fans. So yeah definitely no point in even thinking about trying to use a mech fan setup.

EDIT: Another obvious option if you aren't set on having a pristine flat hood would be to add louvers or a scoop to vent the engine bay.