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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > aFe Stage 2 installed. My thoughts.



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      01-07-2011, 07:44 PM   #23
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UNINSTALLED. F*$# AFE.

I put the stock box back on and what a HUGE improvement. I DON'T recommend this mod to anyone. Invest your money else where.
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      01-08-2011, 07:41 AM   #24
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Quote:
Originally Posted by AlpineSwift View Post
UNINSTALLED. F*$# AFE.

I put the stock box back on and what a HUGE improvement. I DON'T recommend this mod to anyone. Invest your money else where.
I had the AFE last year, but the car kept "surging" at speed. I cleaned the MAF, but the surge was still there. I removed and installed the Dinan Ram Air. I love it and would recommend it to anyone. I have the Dinan Ram Air, BMW Performance Exhaust, PBX on Map 0 (different issue) and Autothority Tune. My next step is to add the Dinan Throttle Body, Sprint Booster and Active Autowerkes tune.
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      01-08-2011, 01:36 PM   #25
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AA tune AND sprint booster? I would drop the sprint booster since the tune is gonna give you all the throttle snap you wish for.
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      01-08-2011, 04:29 PM   #26
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Guys evidence is the fact AFE itself comments on HEAT SOAK and how that is bad, which is why they use the OEM plastic air box on the m3 AFE intake and they even comment on their site that this is better than the "open design" which most of their products are because of the heat soak issue. So while trying to sell the new products for the m3 years ago they basically said their open design is rubbish and it makes sense. A big open intake belongs on a ricer not a bmw
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      01-08-2011, 06:51 PM   #27
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Quote:
Originally Posted by 5erman View Post
Guys evidence is the fact AFE itself comments on HEAT SOAK and how that is bad, which is why they use the OEM plastic air box on the m3 AFE intake and they even comment on their site that this is better than the "open design" which most of their products are because of the heat soak issue. So while trying to sell the new products for the m3 years ago they basically said their open design is rubbish and it makes sense. A big open intake belongs on a ricer not a bmw
+1 that "heat shield" is a gimmick. It reflects radiated heat, so it may heat slower but heat is transferred by conduction and convection. So the engine bay will get hot no matter what, and the entire intake system will get hot since the heat sheild doesn't protect against conduction or convection. Now that heat sheild will reflect heat back inside the intake giving you even hotter air.
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      01-08-2011, 06:59 PM   #28
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Quote:
Originally Posted by know1isgod View Post
I had the AFE last year, but the car kept "surging" at speed.
I think the biggest problem with it is the open design like someone else has already stated. If it was sealed and had a ram air setup from a fender or something, It might be worth 5hp (on the high side...). Surging, No low end, and terrible fuel mileage because you have to really hammer the throttle to get it up to speed.

This is by far the worst mod I have ever paid for on any of my cars.
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      01-08-2011, 09:08 PM   #29
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Quote:
Originally Posted by 5erman View Post
Guys evidence is the fact AFE itself comments on HEAT SOAK and how that is bad, which is why they use the OEM plastic air box on the m3 AFE intake and they even comment on their site that this is better than the "open design" which most of their products are because of the heat soak issue. So while trying to sell the new products for the m3 years ago they basically said their open design is rubbish and it makes sense. A big open intake belongs on a ricer not a bmw
I never thought I would say this, but hey I agree with you
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      01-12-2011, 03:50 PM   #30
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Maybe customizing some kind of box to go around it and seal it up? idk probably a crazy hassle....i too have an AFE intake, the dual cone one, and think it will help a lot more later down the road if i get a vented hood to get rid of all that engine heat. just a thought
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      01-12-2011, 04:27 PM   #31
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Quote:
Originally Posted by AlpineSwift View Post
UNINSTALLED. F*$# AFE.

I put the stock box back on and what a HUGE improvement. I DON'T recommend this mod to anyone. Invest your money else where.
Lets add ram air to your Stock now
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      01-12-2011, 04:58 PM   #32
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i have always wondered why afe wasnt closed case air box... i mean they sell air scoops too so why not make something that can take advantage of the other? they do sell it as a combo already anyways. im sure it would be a pretty good "ram air" intake if afe can make something thats closed box.
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      01-13-2011, 12:07 AM   #33
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Quote:
Originally Posted by Craven 328 View Post
Lets add ram air to your Stock now
Still waiting for you to give me some secondary inlet pointers
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      01-13-2011, 12:44 AM   #34
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Quote:
Originally Posted by dtc100 View Post
Still waiting for you to give me some secondary inlet pointers
Hey,
I don't have pics because the piping is ripped out, but I will explain the best I can.

Step 1

Remove the stock airbox

Step 2

On the side of the oem air box, front corner area, drill a 2.5" hole in front of the filter side of the air box

Step 3

Remove driver side fog light grill in the front bumper

Step 4

Remove half of the driver side brake cooling duct, it is just a snap on part with 1 screw in the wheel well also, pull and pop it out however you can.

Step 5

Using a flexible intake pipe from Spectre (20$ at kragen auto parts) run the pipe down to the brake duct, and forward to the very front of the bumper grill, next to the driver fog light. It should be a 90 degree turn into the brake vent ending at the grill.

Step 6

Zip tie the pipe to the remaining part of the brake duct

Step 7

Mate the new tube to the freshly cut box and reinstall the oem box.

Step 8

Go for a drive

Remember to blow out all the plastic from the oem box before putting it in the car.

Hope this helps bro

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      01-13-2011, 03:53 AM   #35
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I'm guessing this is better than scoops? How is this in heavy rain? I need a project to occupy myself with this week.
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      01-13-2011, 03:54 AM   #36
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hmm cool options
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      01-13-2011, 09:58 AM   #37
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Quote:
Originally Posted by AlpineSwift View Post
I'm guessing this is better than scoops? How is this in heavy rain? I need a project to occupy myself with this week.
First thank you Gavin, good to know I do not have to remove the bumper to do this. Will give it a try.

My theory is this will supplement the scoops/drop in/carbon delete. The scoops help at high vehicle speed, but not off the line speed. The secondary inlet allows more air at any speed, at high speed it is another scoop added too.
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      01-13-2011, 12:23 PM   #38
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Pictures are a must I think before I tackle this. Don't wanna pop out the wrong pieces.
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      01-13-2011, 12:28 PM   #39
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Quote:
Originally Posted by AlpineSwift View Post
I'm guessing this is better than scoops? How is this in heavy rain? I need a project to occupy myself with this week.
Its not better then scoops, id say they work together very well. In the rain its no problem, I never managed to get water to go all the way up the pipe, car washes and puddles are fine too.
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      01-13-2011, 12:32 PM   #40
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Quote:
Originally Posted by AlpineSwift View Post
Pictures are a must I think before I tackle this. Don't wanna pop out the wrong pieces.
I havent done this on an e92 yet, but I assume its the same way, just a little tighter squeeze for the engine bay.

The grill next to the drive fog light is what needs to pop out.

If you look in your driver side front wheel well, there is a vent that runs from your bumper, to the wheel well to "cool" the brakes, half of that gets popped out too

I wish I had taken pictures on it before i was pulled out, sorry on that one guys.
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      01-13-2011, 12:34 PM   #41
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I'll start looking at tools in the garage today to see if I can pull this off while I'm still in the appt.
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      01-13-2011, 03:22 PM   #42
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Quote:
Originally Posted by Craven 328 View Post
I havent done this on an e92 yet, but I assume its the same way, just a little tighter squeeze for the engine bay.

The grill next to the drive fog light is what needs to pop out.

If you look in your driver side front wheel well, there is a vent that runs from your bumper, to the wheel well to "cool" the brakes, half of that gets popped out too

I wish I had taken pictures on it before i was pulled out, sorry on that one guys.
When I get around to do this, I will take pics. Thanks again for the pointers. How hard is it to pop out the duct? I am thinking losing the screw next to the duct outlet behind the wheel well, was this how you started out with?
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      01-13-2011, 04:04 PM   #43
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Quote:
Originally Posted by dtc100 View Post
When I get around to do this, I will take pics. Thanks again for the pointers. How hard is it to pop out the duct? I am thinking losing the screw next to the duct outlet behind the wheel well, was this how you started out with?
It takes some wiggling and a tug, but isnt too hard. Yes take out that screw also, it holds in it.
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      01-13-2011, 05:54 PM   #44
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damnn i just bought the dual cone afe but didnt install it yet.. is it really that bad??? should i just return it nd do something else?
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