# Aero=Hood Venting/Scoops Theory Application **URL:** \ **Category:** SON240sx Automotive\ **Created:** [January 17, 2008, 2:25pm UTC](https://forums.speedlife.net/t/aero-hood-venting-scoops-theory-application/112509 "2008-01-17T14:25:37Z")\ **Posts on this page:** 1\ **Showing post:** 24
**Author:** ![BAS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bas/32/5540_2.png) [@BAS](https://forums.speedlife.net/u/BAS)\ **Post date:** [January 19, 2008, 11:02am UTC](https://forums.speedlife.net/t/aero-hood-venting-scoops-theory-application/112509/24 "2008-01-19T11:02:36Z")
No idea what thats about, air temp does not matter beyond say, heating your cabin. All modern cars have a pseudo ‘airfoil shape’ as such cars naturally have ‘lift’. The fact that a std car weighs in at what it does, keeps it mostly on the ground. ( Some super/hyper cars DO need wings to keep the damn things planted though ). As you smooth the underside of the car you DO gain flow eff. however you also increase the lift by increasing air speed, this lowers the air pressure under the car even more… ( airfoil theory again) the more pressure differential between the upper and lower surfaces the more lift in creates. A rear diffuser, front air dam, trim plates, rear wing, spoilers are all effective ways to keep a vehicle planted. but again, 99.9% of all daily drivers do NOT need to worry about lift… ever. Ducting… that is the key to any GOOD heat exchange system, I did a V mount for an S13 awhile back, he found that he had to tape off the std. pig nose front opening by as much as 50% because it was doing TOO good a job of cooling at hwy speeds by dropping the temps down below optimum operating temps… > [@Kumho Street Warriorz pics, videos, stories, experiences, etc](https://forums.speedlife.net/t/kumho-street-warriorz-pics-videos-stories-experiences-etc/15548/41): > > actualy there is hardly any vacume from under the car because cold and hot air REALY hate eachother. > > in effect this would not cause the car to lift of the ground, because the lines of the car push it down at high speeds. so you want as smooth of air flow as you can get to let the air compress and move untouched. there for pulling the car down more. > > if your that worryed about cooling put in 4 electric fans, 2 on the front blowing air onto the motor and 2 on the back of the rad sucking air in and blowing in on the motor. > > even still none of this matters THAT much unless your going 300kph+ --- _[View the full topic](https://forums.speedlife.net/t/aero-hood-venting-scoops-theory-application/112509)._