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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > VIP CAI installed!!!



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      01-13-2008, 01:36 PM   #45
Sniz
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I'm just going to wait until vishnu's dual cone intake comes out
thats going to be a hot air intake correct?
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      01-13-2008, 02:09 PM   #46
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Quote:
Originally Posted by Sniz View Post
thats going to be a hot air intake correct?
Hope not, or no ones going to buy it when they can make it, this time really from parts from a local store.
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      01-14-2008, 06:17 AM   #47
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AU335...Congrats on the CAI. Sounds like there is a definite power improvement. Keep us posted when on you're upcoming dyno...

O-cha...when I fist saw this CAI design I thought the same thing, but after some thought I've changed my mind. I don't think the 180 degree turn is as detrimental to airflow as we might think.

Think of it more like Air being sucked through the pipe, rather than Water being poured through it. I've studied Hydrodynamics and Air has Way less resistance that Water! Plus you have more of a pulling in or suction of outside Fresh-Air from the Filter to the Turbo's, than you do a ram-air effect from the outside airflow.

If you've ever lived in a house with an attic fan you'll begin to see what I mean. When the attic fan is on and it's pulling air from the furthest window in the house, that air is not moving in a straight line to get back to the fan. It goes around corners, under doors and up the steps because the Pull of the fan and the low pressure it creates draws it up and through the fan...

But IMHO I think a splitter/divider might improve the airflow on this 180 degree turn (highlighted in Red). At least each Turbo would be delegated HALF the incoming Air...
Ask any fluid engineer and he will tell you fast flowing air acts very much like a fluid.
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      01-14-2008, 06:24 AM   #48
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and MSDS's system will cost you $600 plus shipping, yet I'm still considering it knowing that I need an intake of some kind. I dont want an open cone intake sucking in hot air from the engine bay, so the cold air kits are my only choice.........

Once the 135i hits the market many, MANY new companies will be entering this market. They know the lower cost of the car means many people will be defecting from things like the IS300/350 Acura TL, etc. to the BMW. Some of the tradional Japan only companies like HKS, Apexi, etc. will all be getting into this market and it will make life much better on all of us.
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      01-14-2008, 02:01 PM   #49
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Originally Posted by Former_Boosted_IS View Post
Ask any fluid engineer and he will tell you fast flowing air acts very much like a fluid.
I think I realized it was useless when he compared the intake to his attic fan.
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      01-14-2008, 02:15 PM   #50
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I think I realized it was useless when he compared the intake to his attic fan.
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      01-14-2008, 02:40 PM   #51
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      01-16-2008, 12:51 AM   #52
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VIP Tuning CAI Sound & Video Clip

posted on "The Other Site"...Exclusively Would post a link, but im sure the admins call that spamming

**Look at my smilie on my sig if you don't know the "Other Site"
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      01-17-2008, 02:42 PM   #53
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thats funny
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      01-17-2008, 09:26 PM   #54
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it looks like the secondary pipe will definately see some vacuum?
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      01-17-2008, 09:39 PM   #55
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it looks like the secondary pipe will definately see some vacuum?
The entire intake sees vacuum, but yea probably more.
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