Would my dual snorkel scoop be affecting my cooling at highway speed?

89on35s said

I finally got around to testing this. No changes to the motor at all for this test. 30* C day and I took a 40 mile cruise with the AC on high. Temp hit 210 and was confirmed by my IR temp gun. I taped off the openings in the dual snorkel hood and drove the same 40 miles home at the same speed with the AC on. I saw a 25* drop in operating temp and the AC was noticeably colder on the trip home. The unsealed scoop definitely has a negative affect on airflow through the Rad.

Cley

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It would only make sense!! The amount of air that passes through the radiator is determined by a pressure differential, that is to say that the more pressure you have in front of the radiator and the less pressure you have behind the radiator will determine how much air actually passes through the radiator fins. So if you have these scoops pushing air into the engine bay it creates pressure that interferes with the air that's trying to pass from the front of the radiator into the engine bay/??? That may be why Mopar "factory" hood scoops were always sealed off from the engine bay??

treblig