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      05-17-2012, 09:04 AM   #1
Flash237
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Scoops @ higher boost

I know the scoops work best as a placebo effect than anything else but if your running 14psi+ do you think it could make a slight difference or still nothing at all?

Any experiences? Noticeable differences?

Any input would be appreciated
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      05-17-2012, 09:45 AM   #2
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Well IMO scoops are to collect more dust and garbage to your filter box
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      05-17-2012, 08:07 PM   #3
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I have aFe scoops and did not notice a difference with higher boost, but I did not remove them either
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      05-17-2012, 08:15 PM   #4
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All that the scoops could possibly do is boost you to your boost limit quicker. That would be hard to feel.
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      05-17-2012, 10:12 PM   #5
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If anything, they'd have a bigger effect at higher driving speeds rather than higher boost levels. Driving faster and scooping up the air quicker into the intake tract might have a tiny effect. But not a huge one. Probably good for 1 whp.
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      05-18-2012, 03:10 AM   #6
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I was running FBO Cobb Stage 2+ with a K&N drop in, so around 18psi. I switched to DCIs and didn't notice anything positive from it. After installing Cyba scoops though it seemed to be an improvement. Hope that helps. IMO they are worth it for $49.
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      05-18-2012, 06:03 AM   #7
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If those scoops helped, they'd be original equipment.
The turbo is sucking up air, the only way to boost intake efficiency is to enlarge the intake pipes themselves.

Imagine sucking air through a straw: even if you put a funnel on the end of the straw you won't suck in any more air. The amount of air you move is dependent on your lungs (the turbo) and the straw (the intake piping).

But if you like them, install them.
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      05-18-2012, 10:00 AM   #8
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Im putting them on for looks. F it
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      05-18-2012, 12:28 PM   #9
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Quote:
Originally Posted by Mr Kleen View Post
...
Imagine sucking air through a straw: even if you put a funnel on the end of the straw you won't suck in any more air. The amount of air you move is dependent on your lungs (the turbo) and the straw (the intake piping)...
Aren't the scoops sort of "channeling"/"forcing" more air into the intake system?

As to your explaination, pushing more air up the straw?

I have the red RPI scoops, not exactly sure if I felt a difference, car is fast as hell already. Maybe I did notice a better pull when doing highway runs (speeds above 80 mph...).
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      05-18-2012, 01:28 PM   #10
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Take a look at this...
http://www.paladinmicro.com/documents/RamAirMyth.pdf
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      05-18-2012, 01:31 PM   #11
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I feel that hood scoops will just catch a ton of dust under your hood unless it was built directly into the intercooler like Subarus.

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      05-18-2012, 10:32 PM   #12
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Quote:
Originally Posted by Nifty
That was a good read.. Guess ppl will have to find another reason to say why they installed a scoop maybe it just helps to lower air temperature and allows for "slightly" cooler air to enter the airbox..
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      05-18-2012, 10:49 PM   #13
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Quote:
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I feel that hood scoops will just catch a ton of dust under your hood unless it was built directly into the intercooler like Subarus.
Lol, I think OP is talking about ram air scoops like these, not hood scoops like on the Subie's. Works great on STI's, Minis, and the like, but... a 1er with a hood scoop... ewwww!
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      05-18-2012, 11:01 PM   #14
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I never thought of "ram air" when talking about the scoops. In the BMW case, I'd like to think that the scoops may help avoid stalling of the air in the intake tract.

On [recent] BMWs, the air intake is angled 90 degrees down and presents as two holes in a plane. Imagine for a moment that the engine is off, and not sucking in air. If the car is moving forward (despite the engine being off) - especially faster - the air rushes past these openings. With my limited knowledge of fluid dynamics, I think this could cause stalling of the air and essentially creating a vacuum in the intake tract. Now of course the engine running causes negative pressure in the intake and thus sucks in air - even against the stalling force.

Based on that (quite possibly flawed) assumption, I could imagine that the air scoops actually redirecting incoming air upwards, would aid in airflow by reducing the stalling/slowdown of incoming air.

Again, quite possibly wrong, but just my $0.02...
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      05-19-2012, 04:29 AM   #15
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Quote:
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      05-19-2012, 05:06 AM   #16
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Quote:
Originally Posted by int2str View Post
I never thought of "ram air" when talking about the scoops. In the BMW case, I'd like to think that the scoops may help avoid stalling of the air in the intake tract.

On [recent] BMWs, the air intake is angled 90 degrees down and presents as two holes in a plane. Imagine for a moment that the engine is off, and not sucking in air. If the car is moving forward (despite the engine being off) - especially faster - the air rushes past these openings. With my limited knowledge of fluid dynamics, I think this could cause stalling of the air and essentially creating a vacuum in the intake tract. Now of course the engine running causes negative pressure in the intake and thus sucks in air - even against the stalling force.

Based on that (quite possibly flawed) assumption, I could imagine that the air scoops actually redirecting incoming air upwards, would aid in airflow by reducing the stalling/slowdown of incoming air.

Again, quite possibly wrong, but just my $0.02...

you wouldnt be stalling the air perse. But the 90 degree angle of the intake ducts to the free stream causes separation of the flow at the forward most point.

Its hard to explain without drawings. But the air rushing around the corner wont be able to hold the corner - no matter what. The scoops will make no difference because the air still has to turn that sudden 90 degrees, which it really cant do efficiently.


If you want redesign the intake track to the filter than something like a GT500 KR hood would be in your future. No turns until the filter is much more efficient.

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      05-19-2012, 06:20 PM   #17
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Quote:
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Interesting read...
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      05-19-2012, 06:49 PM   #18
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Not a fan of scoops that block direct air flow to the radiator. Our cars run hot enough without any help from the scoops.
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      05-20-2012, 08:10 AM   #19
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The scoops are bunk. Move on.
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