Thanks for the info =)

 

someone failed "reading comprehension"

 

i would like to see more of that cut hood as well

 

a vented hood should work because of all the heat youll be getting rid of.. if not jus raise your by the hinges like drifters do and youll have better engine temps, thats wat i did with my hood and i saw a good drop in my temps...

 

You mean where cowl induction hoods have their intake? Hmmm... OK.

 

just buy a fiberglass cowl hood scoop for like 50 bucks and get it molded on your hood.....rx7s with cowl hoods are SEXY

 

Cowl hoods, or pop-up hinges won't lower under hood temps. Atleast not in theory...

Riz.

 

umm yeah they do. have you ever watched wind tunnel testing? scoops like on subies and turbo II's pull a decent amount of air because it is getting pushed in those holes. but if you get moving fast enough the air will accually break right right above them and flow right over and you get little to nothing. cowl hoods and the drifter trick are basiclly pushing air out of the engine bay, it comes in through the grill or front of the car and then pushes the hot air out and over your windshield and over you car. and at any speed it workes as a funnel to move air in and out. granted it's not as badass as have some huge scoop on your hood that makes everyone think your cramming massive air lol

 

That is wrong. Cowl induction sucks air in. The cowl opening happens to be in a high pressure area for a reason. The carbureted cars these were originally on could get cool air right to the air cleaner from the high pressure area at the base of the windshield.

Josh

 

NO. if you are in a head on collision, you run the risk of the hood going through the windshield and lobbing your head off.

 

First of all you guys should figure out the difference between a scoop/intake and a vent. Second you should learn about the difference in pressure areas on the hood and on the windshield. Some peeps over here know what's going one, but most don't seem to know or wanna know.

To get this straight: A intake takes air into the enginebay, a vent vents it out... The last 20 centimeters or so of the hood before it hits the windshield is a high pressure area, making it unsuitable as a vent. Any opening you create here will act as a intake (including cowl hoods). Ever wondered why pretty much every car has it's interior air intake at the base of the windshield? My VW Bug doesn't even have a interior fan, it depends on the high pressure area at the base of the windshield and the end of the hood. The only exeption to this rule I could think of is when you are running a flat and closed underplate along the underside of your car, the enginebay pressure not able to escape under the car, might build up to a point where it can overcome the pressure at the windshield (still not making it a good location to vent tho). Air (carrying heat) will only travel because of pressure differences.

But to get back to the original question: The location af the TII scoop is a somewhat high pressure area --> making it a intake (as it was designed to do so) --> increasing enginebay pressure --> reducing pressure difference infront and behind the radiator --> there for decrease air moving through radiator and decreasing cooling capabilities.

Will a TII hood on NA car improve engine cooling ? In theory: NO!

Riz.