Cold Air Intakes Mythbusted
05-04-2012, 12:19 PM
#3
Registered User
Join Date: Jun 2009
Location: Bellevue, WA
Posts: 339
Likes: 0
Received 0 Likes
on
0 Posts
Ok, so this is somewhat good that they are using a dyno, and they are doing multiple runs. And they do show an improvement in both air temperature and power when done in the extreme case (just not a big one).
BUT...
Here is the fundamental thing missing: air pressure at speed against the front of the car. This is a big factor, because all of the horsepower spent maintaining speed is pushing against the air. You can't get this kind of pressure from a fan, since as we know, the force is directly proportional to velocity squared across the front (which is why cars max out around 220 mph). In F1 cars, this is enough to generate multiple Gs of downforce. This is also where open filters will suck in a lot more air, since the air is pressurized beyond 1 atm. In fact, if you could get the force of the air on the front of the car through a venturi filter, you could in theory get +1 atm on the airbox, the same as a regular turbocharger.
You will at least see a few psi increase a highway speeds. That is what you feel when you stick your hand out the window. Thus, their testing is missing a critical factor that, combined with their results, would produce bigger gains.
Thus, MYTH PLAUSIBLE.
BUT...
Here is the fundamental thing missing: air pressure at speed against the front of the car. This is a big factor, because all of the horsepower spent maintaining speed is pushing against the air. You can't get this kind of pressure from a fan, since as we know, the force is directly proportional to velocity squared across the front (which is why cars max out around 220 mph). In F1 cars, this is enough to generate multiple Gs of downforce. This is also where open filters will suck in a lot more air, since the air is pressurized beyond 1 atm. In fact, if you could get the force of the air on the front of the car through a venturi filter, you could in theory get +1 atm on the airbox, the same as a regular turbocharger.
You will at least see a few psi increase a highway speeds. That is what you feel when you stick your hand out the window. Thus, their testing is missing a critical factor that, combined with their results, would produce bigger gains.
Thus, MYTH PLAUSIBLE.
Last edited by MaelstrØm; 05-04-2012 at 12:24 PM.
05-04-2012, 12:36 PM
#5
Super Moderator
MY350Z.COM
MY350Z.COM
iTrader: (8)
Ok, so this is somewhat good that they are using a dyno, and they are doing multiple runs. And they do show an improvement in both air temperature and power when done in the extreme case (just not a big one).
BUT...
Here is the fundamental thing missing: air pressure at speed against the front of the car. This is a big factor, because all of the horsepower spent maintaining speed is pushing against the air. You can't get this kind of pressure from a fan, since as we know, the force is directly proportional to velocity squared across the front (which is why cars max out around 220 mph). In F1 cars, this is enough to generate multiple Gs of downforce. This is also where open filters will suck in a lot more air, since the air is pressurized beyond 1 atm. In fact, if you could get the force of the air on the front of the car through a venturi filter, you could in theory get +1 atm on the airbox, the same as a regular turbocharger.
You will at least see a few psi increase a highway speeds. That is what you feel when you stick your hand out the window. Thus, their testing is missing a critical factor that, combined with their results, would produce bigger gains.
Thus, MYTH PLAUSIBLE.
BUT...
Here is the fundamental thing missing: air pressure at speed against the front of the car. This is a big factor, because all of the horsepower spent maintaining speed is pushing against the air. You can't get this kind of pressure from a fan, since as we know, the force is directly proportional to velocity squared across the front (which is why cars max out around 220 mph). In F1 cars, this is enough to generate multiple Gs of downforce. This is also where open filters will suck in a lot more air, since the air is pressurized beyond 1 atm. In fact, if you could get the force of the air on the front of the car through a venturi filter, you could in theory get +1 atm on the airbox, the same as a regular turbocharger.
You will at least see a few psi increase a highway speeds. That is what you feel when you stick your hand out the window. Thus, their testing is missing a critical factor that, combined with their results, would produce bigger gains.
Thus, MYTH PLAUSIBLE.
Very true , also the supporting mods like headers, exhaust , cams etc etc Many parts do little by themselves, but work together as a whole.
Last edited by terrasmak; 05-10-2012 at 10:46 PM.
05-04-2012, 03:25 PM
#7
New Member
iTrader: (4)
Join Date: Apr 2008
Location: manorville ny
Posts: 1,907
Likes: 0
Received 0 Likes
on
0 Posts
Saw this they dident use a cai made for that car they do somthing injen long tubes help to lean the car out a bit combine that and an exhaust setup and your pretty close to not needing a tune the tube will refine it but it gets it in the ballpark
Trending Topics
05-04-2012, 03:42 PM
#9
National Z Club President
iTrader: (15)
Join Date: Sep 2008
Location: the coolest place on earth
Posts: 9,952
Likes: 0
Received 2 Likes
on
2 Posts
If you introduce more airflow you need to add more fuel to see true power gains.
05-04-2012, 08:03 PM
#13
New Member
iTrader: (4)
Join Date: Apr 2008
Location: manorville ny
Posts: 1,907
Likes: 0
Received 0 Likes
on
0 Posts
Sorry posted this from my phone. What I'm saying is the intake helps to lean out the rich conditions caused by test pipes or hfc along with an exhaust there for getting the afr a little better in cheack but a tune will better refine it and help with drivability. Does that make more sense
05-04-2012, 08:57 PM
#14
Registered User
Join Date: Apr 2012
Location: Las Vegas
Posts: 87
Likes: 0
Received 0 Likes
on
0 Posts
05-05-2012, 10:16 AM
#19
could be right about this
Some type of screen covered with LEDS that goes over the cone filter stickin out about a foot from the bumper.With a HR,this would double the effect
and fun.
They are workin on this in Taiwan as I post.
Check E-Bay.
