Ram Air Scoops (probably not what you think)

Vulcan50 · 05-29-2019, 05:27 PM

So I understand that with a stock routed intake offer very little to no improvement. I however have a hot side inlet. So a friend of mine that has a 335d is letting me borrow his scoops and the air duct that is between the engine and core support (it ducts to the passenger side instead of the driver side).

I tried with a box fan to see what kind of flow improvement there is through the duct with and without the scoops feels like there's at least 2x the air moving through the duct. I'll report back later what temperature difference I see driving. Right now it's usually around 25 degrees over ambient. If this will bring it around 15 over I'd consider it a success.

Jeff@TopGearSolutions · 05-29-2019, 05:29 PM

Quote:

Originally Posted by Vulcan50

So I understand that with a stock routed intake offer very little to no improvement. I however have a hot side inlet. So a friend of mine that has a 335d is letting me borrow his scoops and the air duct that is between the engine and core support (it ducts to the passenger side instead of the driver side).

I tried with a box fan to see what kind of flow improvement there is through the duct with and without the scoops feels like there's at least 2x the air moving through the duct. I'll report back later what temperature difference I see driving. Right now it's usually around 25 degrees over ambient. If this will bring it around 15 over I'd consider it a success.

Keep in mind, unless you are reading IAT in the air box, your IAT reading on the car is after the intercooler. Therefore your intercooler has the largest if not all the part in controlling IAT.

To see improvement on the stock airbox from an efficiency standpoint it's best to look at WGDC.

Vulcan50 · 05-29-2019, 06:46 PM

I currently only have access to the AIT. But I already have the 7" IC, so 10 degree drop would be pretty stellar

tisdrew · 05-30-2019, 04:35 PM

Are you talking about the 335d snorkel?
https://www.ecstuning.com/b-genuine-...lDQRoC2EPw_wcB

I have one but did it for looks and theory. In practice, I saw no performance gain but I also don't measure things in +/- 5hp. Considered custom-making a heat-shielded box around my relocated inlets or maybe pulling from the pass wheelwell.

Vulcan50 · 06-29-2019, 04:25 PM

Quote:

Originally Posted by tisdrew

Are you talking about the 335d snorkel?
https://www.ecstuning.com/b-genuine-...lDQRoC2EPw_wcB

I have one but did it for looks and theory. In practice, I saw no performance gain but I also don't measure things in +/- 5hp. Considered custom-making a heat-shielded box around my relocated inlets or maybe pulling from the pass wheelwell.

Yeah that's what I have on (borrowed) with the scoops, and no additional ducting, it's around 10 degrees better, that's just with air blowing in the direction of the filter.?If I decide to keep it, I'll run a heat shield with a duct going to the snorkel.

Boosted12a · 07-03-2019, 02:32 PM

Have you looked at any type of ducting coming up from inside the bumpper? I don't even know if this can be done, haven't even been under the car since I bought it.....

Bimmer_Engineer · 07-03-2019, 02:56 PM

I can't resist reposting this in case you haven't considered it...

https://www.e90post.com/forums/showt...hlight=burrito

Vulcan50 · 07-05-2019, 11:09 PM

Quote:

Originally Posted by Bimmer_Engineer

I can't resist reposting this in case you haven't considered it...

https://www.e90post.com/forums/showt...hlight=burrito

Quote:

Originally Posted by Boosted12a

Have you looked at any type of ducting coming up from inside the bumpper? I don't even know if this can be done, haven't even been under the car since I bought it.....

Do you mean like from one of the front openings? I've considered it, but I like the stock pieces because the install is a breeze and it all fits tight.

Quote:

Originally Posted by Bimmer_Engineer

I can't resist reposting this in case you haven't considered it...

https://www.e90post.com/forums/showt...hlight=burrito

😂 YIKES!...well...hmmmmm

Vulcan50 · 07-06-2019, 03:44 AM

So I finally had the chance to run back to back, with and without the snorkel and scoops.

It looks like there is no appreciable difference.

Same speed, same water temperature, and the intake temperature remained at about 14 degrees above ambient.

Same stretch of road, temperature (general conditions), and only a few minutes apart.

If I would have seen 3-5 degree drop, I'd think it had merit. But I saw no difference. So I'll try something else. I don't know what...

Jerain · 07-06-2019, 05:33 AM

Not only lower iat is good but feeding colder thus denser air to your turbos is always better... And in high power circumstances your IC has les work to do.

Vulcan50 · 07-06-2019, 04:11 PM

Quote:

Originally Posted by Jerain

Not only lower iat is good but feeding colder thus denser air to your turbos is always better... And in high power circumstances your IC has les work to do.

I agree, but unfortunately my test tells me that there is no temperature benefit from this experiment.

Masher · 07-07-2019, 05:13 AM

how fast were you going though? that matters as well

Vulcan50 · 07-07-2019, 02:02 PM

Quote:

Originally Posted by Masher

how fast were you going though? that matters as well

60 mph

Which I figured would be a best case scenario. Since outside of the interstate going faster wouldn't be real likely.

RJC612 · 07-11-2019, 09:28 PM

Quote:

Originally Posted by Bimmer_Engineer

I can't resist reposting this in case you haven't considered it...

https://www.e90post.com/forums/showt...hlight=burrito

Lmfao ahhh this just made my damn day

LessIsMore · 07-12-2019, 12:00 AM

Intake temps and airflow do matter, even if you have an intercooler

, Is a time tested and clean way to get more air. I would not expect much from it, but it makes for a little better set up.

Vulcan50 · 07-12-2019, 01:08 AM

Quote:

Originally Posted by LessIsMore

Intake temps and airflow do matter, even if you have an intercooler

, Is a time tested and clean way to get more air. I would not expect much from it, but it makes for a little better set up.

While I agree, I'm looking at it from a cost/benefit standpoint. I'd be looking at $150-200 plus fab time. I may be better off grabbing a M3 rep bumper brake duct and trimming and ducting. I think it would offer greater frontal area. Plus I would be able to create better curvature. One thing I wonder was when the air hits the grill scoops vertical face the curves horizontally then 90 degrees to the passenger side, a lot of sharp turns with tight radii. Does this kill flow? I don't know...

type-dRew · 07-12-2019, 07:40 AM

Quote:

Originally Posted by Vulcan50

While I agree, I'm looking at it from a cost/benefit standpoint. I'd be looking at $150-200 plus fab time. I may be better off grabbing a M3 rep bumper brake duct and trimming and ducting. I think it would offer greater frontal area. Plus I would be able to create better curvature. One thing I wonder was when the air hits the grill scoops vertical face the curves horizontally then 90 degrees to the passenger side, a lot of sharp turns with tight radii. Does this kill flow? I don't know...

Just use the 335d inlet pipe and get some of the ecs scoops, they help direct airflow to the snorkel and are cheap. i noticed 4-5% lower wgdc after installing the scoops with no other changes. Nothing i could really feel but im sure they're doing something. I am also running them into the stock airbox however.

But for $60 and a 3 minute install, why not?

https://www.ecstuning.com/b-ecs-part...003384ecs01~a/

Vulcan50 · 07-12-2019, 06:23 PM

To start I'd be at like $110 just in the snorkel and scoops. Then I'd need to duct it over, I imagine I'd easily spend another $50. Plus the time and money to make the heat shield/snorkel dump.

And this is all without seeing even 2 degree benefit from 1/2 of the setup.

type-dRew · 07-13-2019, 03:43 PM

Quote:

Originally Posted by Vulcan50

To start I'd be at like $110 just in the snorkel and scoops. Then I'd need to duct it over, I imagine I'd easily spend another $50. Plus the time and money to make the heat shield/snorkel dump.

And this is all without seeing even 2 degree benefit from 1/2 of the setup.

I wasn't looking for temperature with mine. I just wanted to make getting air to my airbox as easy as possible and like I said I saw a wgdc decrease with hotter inlet temps back to back after install. So I'm good with it.

I understand your issues though

Vulcan50 · 07-13-2019, 09:21 PM

I gotcha, that makes sense. I'm not saying that im abandoning the idea. But am leaning toward a different ram intake method, like the brake duct idea.

05-29-2019, 05:27 PM	#1
Vulcan50 Captain 434 Rep 780 Posts Drives: e92 335i Join Date: Mar 2017 Location: Peoria, IL iTrader: (0)	Ram Air Scoops (probably not what you think) So I understand that with a stock routed intake offer very little to no improvement. I however have a hot side inlet. So a friend of mine that has a 335d is letting me borrow his scoops and the air duct that is between the engine and core support (it ducts to the passenger side instead of the driver side). I tried with a box fan to see what kind of flow improvement there is through the duct with and without the scoops feels like there's at least 2x the air moving through the duct. I'll report back later what temperature difference I see driving. Right now it's usually around 25 degrees over ambient. If this will bring it around 15 over I'd consider it a success.
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05-29-2019, 06:46 PM	#3
Vulcan50 Captain 434 Rep 780 Posts Drives: e92 335i Join Date: Mar 2017 Location: Peoria, IL iTrader: (0)	I currently only have access to the AIT. But I already have the 7" IC, so 10 degree drop would be pretty stellar
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05-30-2019, 04:35 PM	#4
tisdrew First Lieutenant 98 Rep 300 Posts Drives: 2009 335i Join Date: Dec 2015 Location: Melbourne, FL iTrader: (0)	Are you talking about the 335d snorkel? https://www.ecstuning.com/b-genuine-...lDQRoC2EPw_wcB I have one but did it for looks and theory. In practice, I saw no performance gain but I also don't measure things in +/- 5hp. Considered custom-making a heat-shielded box around my relocated inlets or maybe pulling from the pass wheelwell. __________________ "Wheels and exhaust aren't a build"
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07-03-2019, 02:32 PM	#6
Boosted12a Second Lieutenant 69 Rep 210 Posts Drives: BMW 335i x Join Date: Jun 2019 Location: Va iTrader: (0)	Have you looked at any type of ducting coming up from inside the bumpper? I don't even know if this can be done, haven't even been under the car since I bought it.....
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07-03-2019, 02:56 PM	#7
Bimmer_Engineer Lieutenant Colonel 1049 Rep 1,667 Posts Drives: 2007 335i Join Date: May 2018 Location: Louisiana iTrader: (0) Garage List 2008 Porsche Boxster [0.00] 2016 Mercedes Benz ... [0.00] 2007 BMW 335i [9.50]	I can't resist reposting this in case you haven't considered it... https://www.e90post.com/forums/showt...hlight=burrito
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07-06-2019, 03:44 AM	#9
Vulcan50 Captain 434 Rep 780 Posts Drives: e92 335i Join Date: Mar 2017 Location: Peoria, IL iTrader: (0)	So I finally had the chance to run back to back, with and without the snorkel and scoops. It looks like there is no appreciable difference. Same speed, same water temperature, and the intake temperature remained at about 14 degrees above ambient. Same stretch of road, temperature (general conditions), and only a few minutes apart. If I would have seen 3-5 degree drop, I'd think it had merit. But I saw no difference. So I'll try something else. I don't know what...
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07-06-2019, 05:33 AM	#10
Jerain Second Lieutenant 72 Rep 202 Posts Drives: E92 335i 6MT Join Date: Nov 2012 Location: Europe iTrader: (0)	Not only lower iat is good but feeding colder thus denser air to your turbos is always better... And in high power circumstances your IC has les work to do.
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07-07-2019, 05:13 AM	#12
Masher Private 19 Rep 71 Posts Drives: 2008 E92 335i Join Date: Sep 2016 Location: Toronto, Ontario iTrader: (0)	how fast were you going though? that matters as well
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07-12-2019, 12:00 AM	#15
LessIsMore Enlisted Member 6 Rep 37 Posts Drives: 2009 535i Sport Join Date: Jul 2012 Location: DFW, Tx iTrader: (0)	Intake temps and airflow do matter, even if you have an intercooler , Is a time tested and clean way to get more air. I would not expect much from it, but it makes for a little better set up.
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07-12-2019, 06:23 PM	#18
Vulcan50 Captain 434 Rep 780 Posts Drives: e92 335i Join Date: Mar 2017 Location: Peoria, IL iTrader: (0)	To start I'd be at like $110 just in the snorkel and scoops. Then I'd need to duct it over, I imagine I'd easily spend another $50. Plus the time and money to make the heat shield/snorkel dump. And this is all without seeing even 2 degree benefit from 1/2 of the setup.
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07-13-2019, 09:21 PM	#20
Vulcan50 Captain 434 Rep 780 Posts Drives: e92 335i Join Date: Mar 2017 Location: Peoria, IL iTrader: (0)	I gotcha, that makes sense. I'm not saying that im abandoning the idea. But am leaning toward a different ram intake method, like the brake duct idea.
	Appreciate 0 Quote