Vented hood thread

[wstar]

Originally Posted by EZT

Just reporting no issues with my vis and no problems in the rain. Not sure how they are at taking in cold air but you can see hot air escaping

Well, hot air escaping is the only goal here. The "cold" air intake for the engine bay is through the nose and radiator. We just want to give the air coming out the backside of the radiator (out of the fans) a place to vent/suck out of the bay on the hood somewhere. It improves the overall flow rate through the radiator because you're relieving that buildup of high pressure when it all hits the bay and has nowhere good to vent to.

The general "makes basic sense on most cars" point of view is that the best place to vent it is as near as possible to the front/center of the hood right behind the radiator fans, because up high in the rear there's usually a reverse flow of air pushing back forward down the hood (it rolls over at the base of the windshield). Without real data on this exact car, though, it's hard to know for sure. Any kind of venting probably helps, but it would be nice to find a design we know is optimal before cutting up hoods.