Quote:
Originally Posted by TitaniumTT
Negative... it works the opposite way. Removing the weatherstripping allows ambient air to get forced INTO the bay. Common misconception especially among the hondah crowd. At speed, the joint between the hood and the windshield is a high pressure area, removing the weatherstripping allows air to get forced into the bay. It then follows the path of least resistance and gets pulled through the tranny tunnel.
Stationary, sure, heat is going to rise so those ridiculous 2" gaps with spacers they add will relieve some of the heat from the bay because heat rises. However, as said before, at speed it's forcing air into the bay.
A vented hood on the other hand works in the opposite way. Assuming basic aeronautics are followed, the rise in the hood will create a bit of a low pressure zone and pull air from the bay. Of course this isn't the case on my car because the hood is ducted straight to the intercooler. The only purpose my drop vent hood serves is to keep the intercooler as chill as possible.
Last time I was @ LRP with the FC the ambient temps were about 104*. My charge temps of course were in the 300's, IAT's were about 120. Something something ram air something something vented hood something something expensive core.
Also of note.... my radiator fan literally broke to pieces that day... ripped it out (again literally with my bare hands and no tools) and got back on the track... coolant temps never got above 180* when it was 104* outside and tracking the car  Aero can be fun! |
Makes perfect sense to me (engineer). I'm familiar with cowl induction but for whatever reason I didn't put 2 & 2 together. My vented hood is arranged in a similar manner with the radiator and shroud except they're not connect at the moment. I just have the shroud exit pointed in the direction of the hole in the hood.
Quote:
Originally Posted by FC Zach
I have to disagree somewhat with the illustration mainly in the rear bumper area. .
For example if one was to have shitty taillight seals, wouldn't exhaust pull into the car like any other vehicle. Like mine does LOL
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Yeah, that part confuses me. I've owned a lot of hatchbacks and SUV's and the rear window/hatch always gets covered crap. Vortices coming off the sharp corner tend to curl the air back around. I don't have bad taillight seals but is it possible the fumes are only entering when the car is stationary?