10-11-2011, 03:52 PM | #1 |
Private First Class
23
Rep 143
Posts |
Installed aFe Cold Air Intake System Stage 2
A detailed installation manual with pictures are included so it was very straight forward job. It took about 30 minutes.
Product page + installation video http://afepower.com/shop/details_new...0L&&brandID=53 Before After It was not in the installation manual but I have zip tied the cables to the intake pipe. I did not expect power increase but instead, I want more sharp response of the engine. I have done some 5000 km after installation, I feel engine response is more sharper in any RPM and more powerful in the higher RPM than the OEM air cleaner box. Also intake air temperature is lowered. Thus more molecules of oxygen in the cylinder = more power. As you see in the picture, I have fitted HKS BOV with a custom made adapter to fit into the OEM charge pipe. After the installation, the sound of sucking in the air and the sound of the turbo is heard form inside the car. Also, sometimes I can hear the back turbine sound. I am not sure how you call this sound in English. It is not my car but the sound is like this. HKS BOV Back turbine Last edited by KIYO; 10-11-2011 at 04:00 PM.. |
10-11-2011, 04:34 PM | #3 |
Major
450
Rep 1,358
Posts |
What prevents these from sucking in completely heat soaked air? It appears in the first pic that the stock intake is entirely encapsulated and blocked off from air under the hood. The new product looks like it will be very much exposed to under the hood air. Is there another cover or something not shown in the pic?
|
Appreciate
0
|
10-11-2011, 04:52 PM | #5 | |
Banned
225
Rep 3,094
Posts |
Quote:
I believe there is data posted on the N54 forums |
|
Appreciate
0
|
10-11-2011, 06:03 PM | #7 | |
Major
450
Rep 1,358
Posts |
Quote:
That may very well be true but wouldn't you get so much more benefit by fully enclosing the air intake as well as increasing the volume? Ie high volume and low temp = most power. |
|
Appreciate
0
|
10-11-2011, 06:19 PM | #8 |
Captain
8
Rep 704
Posts |
Yes. Note how race teams run their intake ducting. If this box was enclosed it needs a bigger duct running to it so that the box has the least amount of pressure drop across the opening.
|
Appreciate
0
|
10-11-2011, 09:14 PM | #11 | |
Captain
8
Rep 704
Posts |
Quote:
To each their own, but I do not think a proper BOV sounds like screaming, and they sound appropriate on ANY turbo car, considering it is a necessary and functional part of the turbo system..... |
|
Appreciate
0
|
10-11-2011, 11:05 PM | #13 | |
Banned
225
Rep 3,094
Posts |
Quote:
Best case scenario you want no limit on volume with absolute low temps, but its a trade off and according to the data I had seen years ago it looked like the increase in temps wasnt holding back the gains. The bottleneck was the volume. Not saying Im right, just saying what I read (specifically related to the N54). |
|
Appreciate
0
|
10-12-2011, 08:52 AM | #14 |
Private First Class
23
Rep 143
Posts |
Thanks for the comments.
Thank you Das Ein, I will check them. Yes that is all the parts. So in a stand still, I think it is sucking in the hot air inside the engine room. When the car is moving, although some of the hot air might sucked in but there should be enough cold air flowing into the air filter. Let's wait and see what happens in the hot summer. |
Appreciate
0
|
10-12-2011, 08:58 AM | #15 |
Captain
66
Rep 971
Posts
Drives: Ducati Hypermotard
Join Date: Jul 2011
Location: DMV
|
I think for this exact reason, you'd be hard pressed to find good dyno numbers for this mod. It's most effective when the vehicle is actually moving.
__________________
BMWCCA #454364
|
Appreciate
0
|
10-13-2011, 11:39 AM | #18 |
Captain
8
Rep 704
Posts |
|
Appreciate
0
|
10-13-2011, 11:49 AM | #19 |
Private First Class
23
Rep 143
Posts |
The Scangauge is connected to the OBD port to monitor.
With the cooler temperature, the intake air temperature is around 20 degrees C. The blow pic was taken on a hot day. 27 degrees Celsius. VLT is the volt, MAP is the intake manifold pressure in kPa, IA is intake air temperature, WT is water temperature. |
Appreciate
0
|
10-13-2011, 01:26 PM | #20 |
Captain
8
Rep 704
Posts |
Oh i understood that you can gather data from the DME, but I'm wondering why you think the intake temps are too cold. I don't really think there is a point to where your IATs were too cold unless it was throwing your A/F mixure off, freezing fuel/water or any physical hardware, which at 69C i don't think it is.
|
Appreciate
0
|
10-13-2011, 03:03 PM | #21 |
Private First Class
23
Rep 143
Posts |
There is no scientific report nor evidence but based on my tuner advice, I become to believe the intake air temperature of around 40 degrees C is the optimal temperature. He has done a lot to turbo tuning on various cars and he has concluded based on his experience, around 40 degrees C will produce the maximum power.
Too cold intake temperature will end up in too rich fuel/air ratio thus black muffler end. I am not sure how our direct injection management is handling it but I am experiencing power drop in the current cold weather. My previous cars were NA cars. They produce more power in the cold weather. I had no confidence of the tuner advice until I had experienced the power drop in the recent cold weather. May be something else is the cause of the power drop. I am in quest of the cause. |
Appreciate
0
|
10-13-2011, 03:24 PM | #22 |
Captain
8
Rep 704
Posts |
All types of induction have potential for more power in cooler weather at the same altitude, whether it be turbo, supercharged or naturally aspirated. The more oxygen available, the more potential power, assuming no fuel or material strength limitations.
BMW's normal software targets lower boost levels to compensate for the extra air density of cooler weather. That could be the cause of your perceived power loss. Do some logs now, and see what your boost pressure is. It should become higher as it warms up. Also, you will only get full boost if your Oil Temp is over 160F or 71C. If you go WOT before that, your car will feel much slower. |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|