Quote:
Originally Posted by ShocknAwe
Another note is that the cowl and cabin filter are designed to promote proper airflow as it dams on the windshield at speed. It IS functional (if only slightly), and if you take it out the air swirls at the base of the windshield trapping heat in the engine bay and negatively affecting flow patterns over the front of the car as it creates a giant negative pressure spot right there. I've marked running cowl-less as a bad mod (in my book) for this reason. It's one of those small bits of engineering like the flaps in front of the wheels that while generally innocuous, are good to have.
That being said I plan on trying this BOV mod. For $2 and change, cant say no to that!
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Can you elaborate on your testing procedures? I have only anecdotal evidence in regards to the cowl's effect on cooling. Without the cowl, the rear of the hood is now a large vent for heat to escape. When driving the car hard, without the cowl, you can see heat escaping the hood that it otherwise would not do with the cowl in tact.