Functional Fender Vent Kit
Senior Member
Joined: Jul 2006
Posts: 3,611
Likes: 2
From: Lebanon, Tennessee
Re: Functional Fender Vent Kit
Originally Posted by JHM2K
Working for Nissan, I've learned that the GT-R's fender vents are opened for one purpose: lower drag. By allowing the air to escape the fenderwell, the pressures are lowered and witchcraft happens, allowing teh car to slip through the air more efficiently. They're not tied in with the engine bay at all.
Regarding the heat aspect -- if we could somehow tastefully incorporate NACA ducts into the hood, and line these up with a perforated tube linked to the side vents, it would provide a low-pressure slipstream to assist drawing the hot air out.
Now if we could only get the hot air out of this thread...
Ram-air or not, there are definite advantages to facing the air inlet as directly forward as possible, as unimpeded as possible. Otherwise, you wouldn't see F-1 teams place a saucer-sized inlet above the driver's helmet. Skeptics of ram-air abound, but the air ingested into an engine with a forward-facing scoop is always going to be at a greater volume/pressure than a rearward-facing scoop.
F-1 teams have millions of dollars, countless hours, and endless resources to play with. We don't. They build cars based on what works; anything more detracts from performance, anything less undermines it.
Brake ducts, air inlets, radiator cooling surfaces -- all face forward.
The only thing opened towards the rear is the underbody diffuser, and that's to scavenge (remove) air from underneath the vehicle as quickly as possible.
Which, brings me back to my GT-R point.
Regarding the heat aspect -- if we could somehow tastefully incorporate NACA ducts into the hood, and line these up with a perforated tube linked to the side vents, it would provide a low-pressure slipstream to assist drawing the hot air out.
Now if we could only get the hot air out of this thread...
Ram-air or not, there are definite advantages to facing the air inlet as directly forward as possible, as unimpeded as possible. Otherwise, you wouldn't see F-1 teams place a saucer-sized inlet above the driver's helmet. Skeptics of ram-air abound, but the air ingested into an engine with a forward-facing scoop is always going to be at a greater volume/pressure than a rearward-facing scoop.
F-1 teams have millions of dollars, countless hours, and endless resources to play with. We don't. They build cars based on what works; anything more detracts from performance, anything less undermines it.
Brake ducts, air inlets, radiator cooling surfaces -- all face forward.
The only thing opened towards the rear is the underbody diffuser, and that's to scavenge (remove) air from underneath the vehicle as quickly as possible.
Which, brings me back to my GT-R point.
Senior Member
Joined: Mar 2008
Posts: 8,222
Likes: 620
From: St Louis MO
Re: Functional Fender Vent Kit
This thread is supposed to be about functional vents being fabricated and sold from a rather new member. I simply injected a possible alternative for his mod which would entice me to purchase.
And now we are discussing CAI and Ram air concepts.
Perhaps the subject ought to be about the effectiveness of his design concept.
I believe to be effective in evacuating the air, a cowl may be required, preceeding the active vents, in order to provide negative pressue at that point. Despite the flow of air over the car, it is not negative there.
Thirteen's idea of a fan would leave the aethetics the same, which I like. And it woudl also provide air movemet when the car was at stand still. It could operate on a thermal relay, cooling the car even after you shut it down, or just come on when the ignition is active.
And now we are discussing CAI and Ram air concepts.
Perhaps the subject ought to be about the effectiveness of his design concept.
I believe to be effective in evacuating the air, a cowl may be required, preceeding the active vents, in order to provide negative pressue at that point. Despite the flow of air over the car, it is not negative there.
Thirteen's idea of a fan would leave the aethetics the same, which I like. And it woudl also provide air movemet when the car was at stand still. It could operate on a thermal relay, cooling the car even after you shut it down, or just come on when the ignition is active.
Last edited by Franc Rauscher; 09-02-2011 at 01:03 PM.
Senior Member
Joined: Jul 2006
Posts: 3,611
Likes: 2
From: Lebanon, Tennessee
Re: Functional Fender Vent Kit
Originally Posted by Franc Rauscher
This thread is supposedto be about functional vents being fabricated andsold from a rather new member. I simply injected a possible alternative for his mod which would enticeme to purchase.
And now we are discussing CAI and Ram air concepts.
Perhaps the subject ought to be about the effectiveness of his design concept.
And now we are discussing CAI and Ram air concepts.
Perhaps the subject ought to be about the effectiveness of his design concept.
Senior Member
Joined: Mar 2008
Posts: 8,222
Likes: 620
From: St Louis MO
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