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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > All COBB Tuning AccessPORT Flash for N54 335i Discussion Here



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      01-10-2012, 01:26 AM   #3279
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Originally Posted by Sleeper View Post
Haha, I love the different car forums' names for different parts. How are "DP's" different from an "exhaust"? DP's are part of the exhaust system from the turbo's back.

Downpipes, midpipes, catbacks, axlebacks... all exhaust parts.

Anyway, carry on.

ps. Cobb, still very much looking forward to ATR's release.
You have a point. However, performance wise, DPs are a world apart from a catback.
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      01-10-2012, 01:21 PM   #3280
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^I wasn't talking about performance at all, just the weird nomenclature used on this forum for exhaust parts haha.

That said, I found that the significant weight difference between my OEM catback and my aftermarket catback definitely made my car 'feel' more powerful. Obviously that just a function of weight loss and not actually WHP increase, but it was still nice .
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      01-10-2012, 03:55 PM   #3281
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You have a point. However, performance wise, DPs are a world apart from a catback.


I think he's just talking about terminology, and the comments in this post.

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Originally Posted by mithiral67 View Post
Exhaust and DPs are two different things.

Downpipes have the primary cats which are very restrictive at the turbos and need to be replaced for stage 2.

The secondary cats and the mufflers (referred to exhaust for the purposes here) are not very restrictive and dont limit you to run stage 2.
A Cat-Back is part of the exhaust system, as is anything else after the manifold (including the hot side of the turbo). What I think mithiral was saying is a Catback and DPs are two different things.

That said, there's certainly some conflicting information on that page. One person is saying the dp cats are so restrictive, they "need" to be replaced for the Cobb Stage 2 tune, and others (JStang & Brey 335) are saying an upgrade is relatively meaningless, as the stock setup has pretty favorable flow already.

Last edited by AWD Addict; 01-10-2012 at 04:01 PM.
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      01-10-2012, 04:36 PM   #3282
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Quote:
Originally Posted by AWD Addict View Post


I think he's just talking about terminology, and the comments in this post.



A Cat-Back is part of the exhaust system, as is anything else after the manifold (including the hot side of the turbo). What I think mithiral was saying is a Catback and DPs are two different things.

That said, there's certainly some conflicting information on that page. One person is saying the dp cats are so restrictive, they "need" to be replaced for the Cobb Stage 2 tune, and others (JStang & Brey 335) are saying an upgrade is relatively meaningless, as the stock setup has pretty favorable flow already.
dps are the bottleneck on the exhaust. Those are the first to be replaced. The stock exhaust after the dps is fine.
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      01-10-2012, 04:54 PM   #3283
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I think there is still confusion, I have updated my original post.

On this site, exhaust and DPs are generally referred to as two separate things. Yes, the DPs are a part of the exhaust, but on this site, almost 95+% of the time that someone refers to the exhaust, they are only referring to the catback portion of the exhaust. Hence, when someone says an aftermarket exhaust isnt necessary for stage 2+, they mean the cat back portion only. You really should have catless DPs for stage 2+

So when Jstang and Brey335 say that an exhaust isnt needed, they mean an upgraded secondary cats and mufffler.
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      01-10-2012, 06:05 PM   #3284
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Quote:
Originally Posted by AWD Addict View Post


I think he's just talking about terminology, and the comments in this post.
yeah, but on this platform the seperation of "DP" and "exhaust" are very much deserved.
If i was talking to a fellow N54 owner and they said they had aftermarket exhaust i wouldn't assume they had aftermarket DPs.
and the power difference of the DPs are why they are usually listed seperatley from a cat back.
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      01-10-2012, 06:12 PM   #3285
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Yea, the n54 is the first car I have ever modded and as such, researched modding. Now that I am looking at other platforms, I keep looking for the separation without luck.
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      01-11-2012, 12:17 AM   #3286
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Just curious if any knows if cobb is working on a "on the fly map change"...i think this would be an amazing feature to have...sometimes i wish i had this feature so i could change it to valet mode when i drive somewhere and realize i may have to valet my car and dont wanna have to park the car and wait 10mins to switch it and then vice versa to get it back to its original tune
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      01-11-2012, 12:27 AM   #3287
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Just curious if any knows if cobb is working on a "on the fly map change"...i think this would be an amazing feature to have...sometimes i wish i had this feature so i could change it to valet mode when i drive somewhere and realize i may have to valet my car and dont wanna have to park the car and wait 10mins to switch it and then vice versa to get it back to its original tune
Yep, they are working on it. They've got stage 1+, ATR/ATP, race gas/big turbo maps and who knows what else on the list also. They've got a lot of good things coming our way, we've just got to be patient. After what we've seen, we know they can deliver. So just give 'em some time.
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      01-11-2012, 03:47 AM   #3288
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Yep, they are working on it. They've got stage 1+, ATR/ATP, race gas/big turbo maps and who knows what else on the list also. They've got a lot of good things coming our way, we've just got to be patient. After what we've seen, we know they can deliver. So just give 'em some time.
That's interesting news, as the ability to switch maps on the fly is something that I like very much about my current GIAC setup. If COBB were able to replicate that, I would be quite pleased.

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      01-11-2012, 04:36 AM   #3289
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Pardon my ingnorance but what is likely to be required for Stage 1+...DCI only?

I'm soon to upload the COBB Stage 1 to my car but what I'd like to know is, if it flashed up "unrecognised ROM", what happens then? Does the car stay with its stock map so that I can drive it or is the stock map stored on the AP rendering my car useless until I can send them the info they need to make the AP work?
On a side note, how would I go about obtaining the ROM and sending it to COBB so that they could do this? This may not happen but it's good to be prepared.

Thinking of the future, how does COBB deal with the addition of catless DP's and blocking out the codes/warning light? Is this mapped out on Stage 2?

Last edited by Cozy; 01-11-2012 at 04:44 AM.
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      01-11-2012, 04:45 AM   #3290
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Quote:
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Pardon my ingnorance but what is likely to be required for Stage 1+...DCI only?

I'm soon to upload the COBB Stage 1 to my car but what I'd like to know is, if it flashed up "unrecognised ROM", what happens then? Does the car stay with its stock map so that I can drive it or is the stock map stored on the AP rendering my car useless until I can send them the info they need to make the AP work?
On a side note, how would I go about obtaining the ROM and sending it to COBB so that they could do this? This may not happen but it's good to be prepared.
Stage 1+ FMIC is required.

When unrecognised ROM the installation doesnt happen and your car will still run the same, at that point the AP will tell you what to do and it downloads your car's ROM. Then using the AP manager you get the file and send to COBB. Easy
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      01-11-2012, 04:56 AM   #3291
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Stage 1+ FMIC is required.

When unrecognised ROM the installation doesnt happen and your car will still run the same, at that point the AP will tell you what to do and it downloads your car's ROM. Then using the AP manager you get the file and send to COBB. Easy
Thank you
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      01-11-2012, 05:11 AM   #3292
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Quote:
Originally Posted by JamJay View Post
Pardon my ingnorance but what is likely to be required for Stage 1+...DCI only?

I'm soon to upload the COBB Stage 1 to my car but what I'd like to know is, if it flashed up "unrecognised ROM", what happens then? Does the car stay with its stock map so that I can drive it or is the stock map stored on the AP rendering my car useless until I can send them the info they need to make the AP work?
On a side note, how would I go about obtaining the ROM and sending it to COBB so that they could do this? This may not happen but it's good to be prepared.

Thinking of the future, how does COBB deal with the addition of catless DP's and blocking out the codes/warning light? Is this mapped out on Stage 2?
if you check on COBB site there are info in how to handle unrecognized rom. With catless dps just load stage2 . that takes care of the Cel/SES light.
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      01-11-2012, 06:00 AM   #3293
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Thanks enrita. I've read that's there's a possibility I might get the SES light on with just the Stage 1, in this case I believe I do a code delete via the AP and it shouldn't return.
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      01-11-2012, 06:08 AM   #3294
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Quote:
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Thanks enrita. I've read that's there's a possibility I might get the SES light on with just the Stage 1, in this case I believe I do a code delete via the AP and it shouldn't return.
It will keep returning just not straight away.
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      01-11-2012, 06:19 AM   #3295
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It will keep returning just not straight away.
Really? Why would the SES keep illuminating only for Stage 1? I believe it should only do this if I installed catless DP's without flashing stage 2?

I'll be flashing Stage 1 on otherwise stock car.
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      01-11-2012, 06:56 AM   #3296
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Quote:
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Really? Why would the SES keep illuminating only for Stage 1? I believe it should only do this if I installed catless DP's without flashing stage 2?

I'll be flashing Stage 1 on otherwise stock car.
you will get the SES light on stage 1 ONLY if you run catless dps (possibly with catted dps as well).
If you run however dps than i see no point running stage 1 since stage 2 is DONE for dps.
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      01-11-2012, 07:24 AM   #3297
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Misunderstanding I think . My car is stock, nothing aside from the COBB that I am installing shortly. I read a couple of old posts that stated that after the initial COBB Stage 1 install (on stock car) where the warning light repeatedly flashes during the process (as they are meant to), the SES remained on for no apparent reason. A code scan and delete appeared to solve for both parties and never came back, although it was not mentioned what the code was.

Thanks for clearing up my questions, looking forward to installing .
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      01-11-2012, 08:20 AM   #3298
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Quote:
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Really? Why would the SES keep illuminating only for Stage 1? I believe it should only do this if I installed catless DP's without flashing stage 2?

I'll be flashing Stage 1 on otherwise stock car.
Quote:
Originally Posted by JamJay View Post
Misunderstanding I think . My car is stock, nothing aside from the COBB that I am installing shortly. I read a couple of old posts that stated that after the initial COBB Stage 1 install (on stock car) where the warning light repeatedly flashes during the process (as they are meant to), the SES remained on for no apparent reason. A code scan and delete appeared to solve for both parties and never came back, although it was not mentioned what the code was.

Thanks for clearing up my questions, looking forward to installing .
Ah cool assume you meant you had catless dp and you are going to use stage 1
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      01-11-2012, 08:39 AM   #3299
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Catless

Hey all,

New member here and new 335 owner. Love the car and the forum! Since we are on a COBB thread, I have a quick question about DPs. I just took delivery of an AP, but have only played with the S1 Sport so far. Need to change plugs and will then go to aggressive. BUT-I know myself well, and will want more. S2 next! So on to my question...should I go catted or catless? I'm sure this has been debated in numerous threads, but I wanted to hear the answer from the COBB runners please.
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      01-11-2012, 08:46 AM   #3300
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Hey all,

New member here and new 335 owner. Love the car and the forum! Since we are on a COBB thread, I have a quick question about DPs. I just took delivery of an AP, but have only played with the S1 Sport so far. Need to change plugs and will then go to aggressive. BUT-I know myself well, and will want more. S2 next! So on to my question...should I go catted or catless? I'm sure this has been debated in numerous threads, but I wanted to hear the answer from the COBB runners please.
depends on many things. It has nothing to do with cobb. for their stage 2 is both catted and catless allowed.
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