Originally Posted by Robin97396
cowlitzcoach; Years ago many buses were fitted with that air scoup and duct at the top rear of the bus for additional air flow in the engine compartment. Would something like that increase the airflow enough to help these newer buses with the heat issue?
I honestly don't know. I have driven Gillig buses with and without the high capacity air scoop. Both types overheated if it was hot enough outside and the hill was long or steep enough.
I think the major problem isn't so much getting air into the engine compartment but getting air to go through the radiator and coolers and then exiting the engine compartment.
You are trying to move air from a low pressure area and trying to make it go into a high pressure area. The laws of physics are some of the laws you just can't fudge.