Vishnu Cold Air Intake- Prototype... now with fake carbon fiber

cn555ic · 03-02-2009, 11:39 PM

SO cold air is better than hot air going into the intake before it reaches the intercooler...There has been many that would think otherwise and this topic has been debated for quite a while..

jpsimon · 03-02-2009, 11:43 PM

Restriction was the most important issue to begin with (when talking about higher HP figures). But If we can get the best of both worlds than all is good!

Slidewayz · 03-02-2009, 11:44 PM

Quote:

Originally Posted by cn555ic

SO cold air is better than hot air going into the intake before it reaches the intercooler...There has been many that would think otherwise and this topic has been debated for quite a while..

This is high school physics...not really subject to debate, IMHO.

The less thermal energy you need to remove from the inlet charge via the intercooler, the better, right?

If cooler air wasn't better, then why have an intercooler at all?

Cooler air is more dense, which means there's more oxygen molecules per unit volume.

Making power is all about getting as many oxygen molecules as possible into the combustion chamber per unit time combined with exactly the right ratio of fuel and the right ignition event.

cn555ic · 03-02-2009, 11:48 PM

Quote:

Originally Posted by Slidewayz

This is high school physics...not really subject to debate, IMHO.

The less thermal energy you need to remove from the inlet charge via the intercooler, the better, right?

If cooler air wasn't better, then why have an intercooler at all?

Cooler air is more dense, which means there's more oxygen molecules per unit volume.

Making power is all about getting as many oxygen molecules into the combustion chamber per unit time as possible combined with exactly the right ratio of fuel.

I am one of the people that agree with cold air is better than hot air, but if you have been on this forum for the last 2 years, alot of members think otherwise and for the life of me I could never understand their reasoning....I think Shiv at one point also stated the same thing, but I am not sure...I am sure I heard Terry from BMS state this though...If you do a search about this topic you would understand...Thats why I chose the UR Intake over any of the intakes that have the filter ontop of the manifold without any shield whatsover...The only thing I dislike about the UR is the size of the filter, but thats for obvious reasons because a larger filter would not be able to fit in such a small area.

OpenFlash · 03-02-2009, 11:57 PM

Quote:

Originally Posted by Slidewayz

Interesting. Aluminum transfers heat really well, so I would think the incoming cold air would keep it cooler than the CF, which will tend to absorb radiant heat and take longer to cool down. Also, there might well need to be less mass of Al than CF, so less thermal energy would be stored by the housing & transferred to the incoming air.

Try putting aluminum foil in the oven at a high temperature, then take it out. Yeah, it's hot for a few seconds, then cools right down. Do that with CF...it takes longer to warm up, but stays hot for a LONG time.

It's the reduction in mass that gives CF the advantage. It weighs next to nothing compared to aluminum. So the amount of thermal energy it stores at any given time is relatively small. The aluminum intake box would weigh 10x more. But at the end of the day, it really doesn't matter in the big picture.

Shiv

geneatals · 03-03-2009, 12:53 AM

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geneatals · 03-03-2009, 12:53 AM

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OpenFlash · 03-03-2009, 01:06 AM

Update: New pics in first post

XPO186 · 03-03-2009, 01:20 AM

Nice... how about some pics with the top/side open?

**335i** · 03-03-2009, 02:11 AM

i think its enough without any box, dual cones even look better without that protection

its my opinion

lazyassand1balla24 · 03-03-2009, 02:12 AM

doesnt look to great

OpenFlash · 03-03-2009, 02:45 AM

Quote:

Originally Posted by **335i**

i think its enough without any box, dual cones even look better without that protection

its my opinion

IATs are lower and more stable with the box. Aesthetics aren't an issue to me when it means mo powa.

Shiv

**335i** · 03-03-2009, 02:48 AM

Quote:

Originally Posted by shiv@vishnu

IATs are lower and more stable with the box. Aesthetics aren't an issue to me when it means mo powa.

Shiv

so u recommend to get also that box for dci? i saw dci cost 195 and how much it will be with box? what about instalation? also easy? color looks brown, maybe its possible to be made in a black carbon fiber?

GeorgeSmooth · 03-03-2009, 05:43 AM

Quote:

Originally Posted by RambleJ

Looks nice.. But how would i get to my JB+?

You can make the wires longer and stick it in the boot.

pander5 · 03-03-2009, 07:34 AM

I would also guess an enclosure would keep out more dirt to the filter elements resulting in less frequent cleanings? I would really like the look of CF under the hood also.

scalbert · 03-03-2009, 07:49 AM

Dang, I had planned on doing this soon as I wanted to clean up the aesthetics underhood. Probably will still as I have a different take on the look.

Ilma · 03-03-2009, 08:16 AM

Quote:

Originally Posted by pander5

I would also guess an enclosure would keep out more dirt to the filter elements resulting in less frequent cleanings? I would really like the look of CF under the hood also.

I don't think that would be the case given that there is still outside air being fed in from the intake snorkel.
The snorkel would be the greatest source of dirt and dust and it still flows onto the DCI's.

It would probably keep the engine bay cleaner though!

Ilma · 03-03-2009, 08:23 AM

New photos look good Shiv.

So there are two sources of airflow then?
The intake snorkel and also the cutout vent beneath the box in the engine bay.

My only concern would be to keep the enclosure as large as possible so as not to impede airflow by having the sides of the enclosure too close to the filters and create a pressure drop.

I think this is one of the shortcomings in the AFE design.....the enclosure walls sit so close to the filters that they can't seem to fully breathe.

Klepper1 · 03-03-2009, 09:31 AM

looks good Shiv!

hotrod182 · 03-03-2009, 09:31 AM

Quote:

Originally Posted by munters

I Like this look and hope the sound is also nearly not noticable.

Normally this would make the intake quieter. So for those of you that like the loud intake whooshing sounds, you need to decide what is more important to you.

This confirms the over Vbox runs I made comparing open element with my stock air box. I switched to the open air element then put my stock air box back on. The Vbox showed a faster trap with the stock air box. Who would have known?, LOL. But I have also states for Dyno Numbers with the hood open, etc, the DCI has its advantages I guess. But I have always been one more interested in road testing than dyno results.

jadeddjay · 03-03-2009, 09:39 AM

will this fit with my forge dvs and hoses?

and for others.. bov?

jpsimon · 03-03-2009, 11:10 AM

Quote:

Originally Posted by jadeddjay

will this fit with my forge dvs and hoses?

and for others.. bov?

+1 on the forge DV question. Although, I would assume since Shiv is probably mocking this up on his own car which has forge DV's, he'll design it to fit

03-02-2009, 11:39 PM	#45
cn555ic 460 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	SO cold air is better than hot air going into the intake before it reaches the intercooler...There has been many that would think otherwise and this topic has been debated for quite a while..
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03-02-2009, 11:43 PM	#46
jpsimon Team Zissou 3154 Rep 10,200 Posts Drives: 2022 AWD M3 Comp - SMB Join Date: Dec 2006 Location: CT iTrader: (7)	Restriction was the most important issue to begin with (when talking about higher HP figures). But If we can get the best of both worlds than all is good!
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03-03-2009, 12:53 AM	#50
geneatals Ninja 545 Rep 4,051 Posts Drives: 2019 530e Join Date: Dec 2007 Location: So Cal (SFV) iTrader: (3)	---delete--- __________________ Current:2024 G60 550e Retired: 2022 G30 530e, 2019 G30 530e, 2016 F80 M3, 2012 E90 M3 ZCP, 2008 535i Last edited by geneatals; 03-03-2009 at 01:22 AM..
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03-03-2009, 12:53 AM	#51
geneatals Ninja 545 Rep 4,051 Posts Drives: 2019 530e Join Date: Dec 2007 Location: So Cal (SFV) iTrader: (3)	---delete--- __________________ Current:2024 G60 550e Retired: 2022 G30 530e, 2019 G30 530e, 2016 F80 M3, 2012 E90 M3 ZCP, 2008 535i
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03-03-2009, 01:06 AM	#52
OpenFlash 1806 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	Update: New pics in first post
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03-03-2009, 01:20 AM	#53
XPO186 Colonel 130 Rep 2,740 Posts Drives: E92 335i Join Date: May 2007 Location: Albany, NY iTrader: (19)	Nice... how about some pics with the top/side open?
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03-03-2009, 02:11 AM	#54
335i Colonel 188 Rep 2,320 Posts Drives: TOYOTA & 2008 E92 335i 6MT Join Date: Jul 2007 Location: Swiss iTrader: (4) Garage List 2008 335i [9.00]	i think its enough without any box, dual cones even look better without that protection its my opinion __________________ E92 335i Black Saphire 6MT PROcede V5, BMS DCI, Big Tom IC, AR CL-DP's 3", AR Design OC, Forge DV's, OEM M3 side skirts, BMW Performance Wheels 19 inch 269 Black Gloss+Continental ContiSportContact 5P (400hp and 550nm) https://www.youtube.com/user/aistis7..._as=subscriber
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03-03-2009, 02:12 AM	#55
lazyassand1balla24 Lieutenant Colonel 21 Rep 1,618 Posts Drives: 2007 Alpine White/Red Interior Join Date: Mar 2008 Location: Glendale, California iTrader: (0)	doesnt look to great __________________
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03-03-2009, 07:34 AM	#59
pander5 Special Forces - Discretion is superior 32 Rep 1,011 Posts Drives: 335i Coupe Sapphire Black Join Date: Mar 2006 Location: Tampa, FL iTrader: (0) Garage List 2007 335i Coupe [0.00]	I would also guess an enclosure would keep out more dirt to the filter elements resulting in less frequent cleanings? I would really like the look of CF under the hood also. __________________ M3 + trailer hitch = oxymoron
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03-03-2009, 07:49 AM	#60
scalbert Major General 158 Rep 5,776 Posts Drives: '13 S4, '15 Q7 Join Date: Feb 2007 Location: Woodstock, GA iTrader: (8)	Dang, I had planned on doing this soon as I wanted to clean up the aesthetics underhood. Probably will still as I have a different take on the look.
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03-03-2009, 08:23 AM	#62
Ilma Colonel 193 Rep 2,854 Posts Drives: 2023 M4 Competition Join Date: Nov 2008 Location: Mississauga iTrader: (0)	New photos look good Shiv. So there are two sources of airflow then? The intake snorkel and also the cutout vent beneath the box in the engine bay. My only concern would be to keep the enclosure as large as possible so as not to impede airflow by having the sides of the enclosure too close to the filters and create a pressure drop. I think this is one of the shortcomings in the AFE design.....the enclosure walls sit so close to the filters that they can't seem to fully breathe.
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03-03-2009, 09:31 AM	#63
Klepper1 Lieutenant 29 Rep 548 Posts Drives: 2011 1M Join Date: Dec 2007 Location: Houston, Texas iTrader: (7)	looks good Shiv!
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03-03-2009, 09:39 AM	#65
jadeddjay Major 118 Rep 1,441 Posts Drives: e92 335i, f10 m5 comp Join Date: Oct 2005 Location: jackson, ms iTrader: (4) Garage List 2007 e92 335i [0.00]	will this fit with my forge dvs and hoses? and for others.. bov?
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