[flash1214]

Hey guys I am 2 weeks into my new 335is and Im stoked about it even though its still in break in period. Looking forward to getting the Cobb AP in the near future once I get my first oil change and was stuck between these two drop in air filters. Just looking for some feedback from anyone who has had any experiences with either of them. Also, what map am I looking at with the AP if I am stock with either of these air filters? Thanks a lot guys.

[Mike@N54Tuning.com]

Originally Posted by flash1214

Hey guys I am 2 weeks into my new 335is and Im stoked about it even though its still in break in period. Looking forward to getting the Cobb AP in the near future once I get my first oil change and was stuck between these two drop in air filters. Just looking for some feedback from anyone who has had any experiences with either of them. Also, what map am I looking at with the AP if I am stock with either of these air filters? Thanks a lot guys.

They are essentially the same. The BMS one uses an S&B filter while the other is K&N. Its like coke versus pepsi No real fundamental difference between the two companies.

Mike

[benzy89]

Comparing drop-in filters is like comparing which DCI is better: BMS vs. Vishnu. There's really no difference between drop-ins, regardless of manufacturer: BMS, K&N, aFe.

With the COBB AP, the 1st time you go use it, it'll take about 25 mins. This is because you need to "marry" the AP to your car -- The AP will copy all the software settings on your DME and copy them onto the AP (this way, if you ever need to switch back to the Stock/Stage 0 map for dealer service, you've already got it backed up on the AP). Once you marry the AP & your car together, it will tell you what maps to select from on the COBB website (for example, my 08 E90 335i uses the IJEOS maps).

Once you know what maps your car uses, its easy from there -- Just download off the COBB website, update the maps you download from your computer onto the AP, then take the AP & plug into the OBD port and flash your DME for whatever map you want (Drive, Sport, Aggressive Tunes; Stock, Linear & Alternate Throttle Mapping). There's a video on the COBB site that walks your threw everything, but if you have any questions or want to ask another COBB user any questions, feel free to PM me.

[flash1214]

Wow tons of thanks a lot for all the useful info. Really appreciate it. Still looking for a good deal to make the purchase but I'm in no hurry since I'm only at 400 miles. Again thank you so much and can't wait!

[BQTuning]

Originally Posted by flash1214

Hey guys I am 2 weeks into my new 335is and Im stoked about it even though its still in break in period. Looking forward to getting the Cobb AP in the near future once I get my first oil change and was stuck between these two drop in air filters. Just looking for some feedback from anyone who has had any experiences with either of them. Also, what map am I looking at with the AP if I am stock with either of these air filters? Thanks a lot guys.

I wouldnt have waisting my time replying to this if you were living in the northern states where temps by average are a lot cooler.

Being that you live in Florida, South Florida that is, I would recommend doing the K&N drop in for starters with your new Cobb tune.

I ran the K&N drop in for some time and it surved its purpose and you will run "cooler" vs those Princes Leia intakes in this slaughtering heat.

[jreich]

I've had a k&n in my taurus sho for well over 100k miles and it still performs flawlessly. I purchased a k&n for my 335i and the fitment was perfect without any issues. There was a little bit of pitting in the seal, but i dont think that would effect anything.

[mo2566]

Originally Posted by BuraQ

I wouldnt have waisting my time replying to this if you were living in the northern states where temps by average are a lot cooler.

Being that you live in Florida, South Florida that is, I would recommend doing the K&N drop in for starters with your new Cobb tune.

I ran the K&N drop in for some time and it surved its purpose and you will run "cooler" vs those Princes Leia intakes in this slaughtering heat.

Interesting, I was planning to get BMS DCI when I get my 335i, but its hot as crap here in Sarasota and its only going to get worse. Wonder if I should go drop in instead?

[skim7x]

I'm running aFe drop-in and Cobb S2+A making as much power as the PROcede and JB4 guys (no meth) and doing just fine

[Jeff@TopGearSolutions]

I can tell you if you plan on keeping stock intake you should atleast upgrade from the stock filter.

The stock intake needs some more breathing capacity.

[BQTuning]

Originally Posted by mo2566

Interesting, I was planning to get BMS DCI when I get my 335i, but its hot as crap here in Sarasota and its only going to get worse. Wonder if I should go drop in instead?

IMO just do a drop in until you are ready for an upgraded CAI.

[benzy89]

Originally Posted by flash1214

Wow tons of thanks a lot for all the useful info. Really appreciate it. Still looking for a good deal to make the purchase but I'm in no hurry since I'm only at 400 miles. Again thank you so much and can't wait!

If you're only at 400 miles, I'd hold off on the tune until you hit the break-in period (think it's like 1,500 miles) & get that service done.

Originally Posted by mo2566

Interesting, I was planning to get BMS DCI when I get my 335i, but its hot as crap here in Sarasota and its only going to get worse. Wonder if I should go drop in instead?

If you're in FL, I'd recommend that you upgrade your intake somehow (whether its just a drop-in or a legit intake: BMS DCI, aFe intake, STETT CAI, w/e) AND then upgrade your FMIC. Upgrading the FMIC would be real important b/c the air is hot & very dense in FL, so your IATs are already high and the engine is going to be working hard once you start upgrading it. By adding an aftermarket FMIC, you'll be able to drastically reduce your IATs and lower the amount of stress being put on the engine/turbos.

[flash1214]

Originally Posted by skim7x

I'm running aFe drop-in and Cobb S2+A making as much power as the PROcede and JB4 guys (no meth) and doing just fine

You're running stage 2 with only a drop in? Don't you need upgraded intake and downpipe etc to run stage 2 safely with no problems? Just curious and want to make sure.

Btw thanks for all the input guys. I do a lot of research on these forums and they are amazing thanks to you guys but sometimes I am still left with questions, just for peace of mind. Looks like I am going to go with the K&N Drop In for now along with the AP. Still waiting for my break in period though. If any of you guys know any good deals on the AP new or used please let me know. Thanks again guys truly appreciate the help.

[spool twice]

It's basically the same stuff. But if you're running past 15psi, I would recommend a higher capacity filter unit than using the stock airbox. In my experience, the OEM box, even with a higher flow filter, has trouble allowing the turbo's to hit boost targets above 15psi.

[skim7x]

Originally Posted by spool twice

It's basically the same stuff. But if you're running past 15psi, I would recommend a higher capacity filter unit than using the stock airbox. In my experience, the OEM box, even with a higher flow filter, has trouble allowing the turbo's to hit boost targets above 15psi.

In what way? I'm hitting 18psi without any problems using a drop-in filter...

[RnmEvo9]

Originally Posted by spool twice

It's basically the same stuff. But if you're running past 15psi, I would recommend a higher capacity filter unit than using the stock airbox. In my experience, the OEM box, even with a higher flow filter, has trouble allowing the turbo's to hit boost targets above 15psi.

I have no problem hitting my boost target with the stock intake on Stage 2+. Did a 12.3@117mph with the stock intake as well.

[Jeff@TopGearSolutions]

Originally Posted by RnmEvo9

I have no problem hitting my boost target with the stock intake on Stage 2+. Did a 12.3@117mph with the stock intake as well.

It's about lowering the waste gate duty cycles, and in turn you will have lower IAT and improve times theoretically.

Imagine breathing out of a thin straw, you can still breathe, but its harder, in this case its making the turbo's work harder and in turn producing more heat.

Theres some old threads from 08-09 about WGDC with different intakes. It was a common discussion back in the day, not so much anymore.

Edit- guys back in the day used to run with the top of the stock intake box removed, IIRC they noticed improved performance.

[skim7x]

Originally Posted by Jeff@topgearsolutions

It's about lowering the waste gate duty cycles, and in turn you will have lower IAT and improve times theoretically.

Imagine breathing out of a thin straw, you can still breathe, but its harder, in this case its making the turbo's work harder and in turn producing more heat.

Theres some old threads from 08-09 about WGDC with different intakes. It was a common discussion back in the day, not so much anymore.

Edit- guys back in the day used to run with the top of the stock intake box removed, IIRC they noticed improved performance.

Nice analogy. Quick question... Isn't the bottleneck in those tiny thin tubes that actually connect to the turbos? And not the intake? In my opinion, the stock box can provide more than enough air flow to those tiny connecting tubes to reach capacity. Is intake air flow directly related to WGDC? I'm sure there are other factors. And has any dci been proven to decrease WGDC? And then has deceased WGDC been proven to increase turbo or engine longevity?

[Jeff@TopGearSolutions]

Originally Posted by skim7x

Nice analogy. Quick question... Isn't the bottleneck in those tiny thin tubes that actually connect to the turbos? And not the intake? In my opinion, the stock box can provide more than enough air flow to those tiny connecting tubes to reach capacity. Is intake air flow directly related to WGDC? I'm sure there are other factors. And has any dci been proven to decrease WGDC? And then has deceased WGDC been proven to increase turbo or engine longevity?

As I mentioned previously its been beaten to death that drop in filters and DCI lower wastegate duty cycle, so the stock intake box especially with stock filter is definitely a bottleneck without question. I think Mr.5 did some reviews about it including his test results with his DIY Mr. 5 intake.

Furthermore, I would agree the turbo inlet piping itself is also a restriction but that isn't a practical upgrade. I think there was a company or 2 looking into turbo inlet upgrades but I dont know if they ever came about and the install was not easy.

[skim7x]

Originally Posted by flash1214

You're running stage 2 with only a drop in? Don't you need upgraded intake and downpipe etc to run stage 2 safely with no problems? Just curious and want to make sure.

Yeah, making 370rwhp and 370ftlb on a mustang dyno with drop-in filter... I just prefer cold air intake vs hot air intake... In my personal experience, I get lower IAT's with my stock CAI over aftermarket hot air intakes (doesn't that seem logical?)

If you look at the Cobb website, you'll see that a drop-in filter does qualify as an upgraded intake and is suitable for S2+A.

[BQTuning]

^ +1

[flash1214]

So I decided to look into air intakes (bms dci) instead of going drop in air filter and now I run into threads that are saying DCI can cause loss of power on a 335is so now I am all confused. My car would be stock with Cobb AP and either intake or DIF. What do you guys think about DCI possibly affecting power and if not am I making the right choice with the BMS DCI to go along with Cobb?

Lastly, can I go stage 2 with either a Drop in or intake only? Thanks guys. Hopefully someone can clear up this confusion for me.

[spool twice]

Originally Posted by Jeff@topgearsolutions

It's about lowering the waste gate duty cycles...

This is the reason why I had trouble hitting boost targets above 15psi.