kmead
Old enough to know better
This is rather interesting, using a precision barometer to measure pressure drop across a vehicles surfaces.
http://www.gcdataconcepts.com/carairflow.html
One could imagine getting some empirical data on what is actually happening by applying it to the bottom of the car, at various elevations inside the engine compartment and at various points across the engine cover at various speeds over the same route on the same day.
I suspect we will find there isn’t as much flow through the engine compartment as some may think given the number of covers at the front of the engine bay, the limited flow under the car and the relative low pressure over the top of the engine bay. That’s my opinion but one test is worth all of our opinions or the other saying that opinions are like a**holes, everyone has one.
It might also be interesting to get ahold of a anemometer to measure actual airflow speed in various parts of the engine bay. These are very cheap on various sites and if you find one that hold data for at least max min flow it would be worthwhile.
http://www.gcdataconcepts.com/carairflow.html
One could imagine getting some empirical data on what is actually happening by applying it to the bottom of the car, at various elevations inside the engine compartment and at various points across the engine cover at various speeds over the same route on the same day.
I suspect we will find there isn’t as much flow through the engine compartment as some may think given the number of covers at the front of the engine bay, the limited flow under the car and the relative low pressure over the top of the engine bay. That’s my opinion but one test is worth all of our opinions or the other saying that opinions are like a**holes, everyone has one.
It might also be interesting to get ahold of a anemometer to measure actual airflow speed in various parts of the engine bay. These are very cheap on various sites and if you find one that hold data for at least max min flow it would be worthwhile.