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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 > Custom Catless Manifold + BMS Downpip Fix Install



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      11-22-2012, 05:08 AM   #23
kiwi29
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I'm a bit curious to see how this sounds vs. If you had an equal length design. Please keep us updated
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      11-22-2012, 04:05 PM   #24
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I'm a bit curious to see how this sounds vs. If you had an equal length design. Please keep us updated
I will take a video today from inside and out.
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      11-22-2012, 04:15 PM   #25
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Quote:
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I will take a video today from inside and out.
What does the bms dp fix exactly do for us n52 owners?
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I'm going to use a very simple analogy, I hope you'll understand.
Driving is like having sex.
It really is. You can read up all you want about how to please a woman, you can look at all the diagrams in the world, but just like the clitoris, you won't know what the hell an apex is before you actually find it.
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      11-22-2012, 04:38 PM   #26
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What does the bms dp fix exactly do for us n52 owners?
its acts like an O2 sim/bung. U need to code it to do that... Not sure how.
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      11-22-2012, 05:15 PM   #27
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its acts like an O2 sim/bung. U need to code it to do that... Not sure how.
Hmm.. I get what you mean now, is this meant to use only with catless headers/dp?
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I'm going to use a very simple analogy, I hope you'll understand.
Driving is like having sex.
It really is. You can read up all you want about how to please a woman, you can look at all the diagrams in the world, but just like the clitoris, you won't know what the hell an apex is before you actually find it.
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      11-22-2012, 11:58 PM   #28
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Hmm.. I get what you mean now, is this meant to use only with catless headers/dp?
yea it tricks the car into thinking the cats are still there to prevent a CEL and failing emissions tests
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      11-23-2012, 08:30 AM   #29
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yea it tricks the car into thinking the cats are still there to prevent a CEL and failing emissions tests
Alright I get it now! Thanks for the claification
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Originally Posted by The HACK View Post
I'm going to use a very simple analogy, I hope you'll understand.
Driving is like having sex.
It really is. You can read up all you want about how to please a woman, you can look at all the diagrams in the world, but just like the clitoris, you won't know what the hell an apex is before you actually find it.
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      11-23-2012, 09:02 AM   #30
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Here is a brief video I could do of some city traffic driving. My mother in law makes a guest appearance.

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      11-23-2012, 09:57 AM   #31
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video is private.
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      11-23-2012, 10:12 AM   #32
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video is private.
sorry. uploaded from my phone and didn't notice. Changed it now. let me know if it works.
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      11-23-2012, 10:19 AM   #33
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Nice.

Need some nice WOT vids too :-)

Looks like there isn't much increase in cabin noise (which is a good thing).
Keep it up :-)
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      11-23-2012, 10:41 AM   #34
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long tube headers are the type that usually make a lot of noise... his are custom catless single-tube headers. Big difference but still makes the necessary horsepower without all the unwanted noise.
I prefer the loudness myself... :/
mapleridge, if you wanted to meet up tomorrow, drop me a PM about where u want to meet.
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      11-23-2012, 04:54 PM   #35
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Quote:
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Nice.

Need some nice WOT vids too :-)

Looks like there isn't much increase in cabin noise (which is a good thing).
Keep it up :-)
I will take another one with WOT on the way home if I can get some uncongested road.

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long tube headers are the type that usually make a lot of noise... his are custom catless single-tube headers. Big difference but still makes the necessary horsepower without all the unwanted noise.
I prefer the loudness myself... :/
mapleridge, if you wanted to meet up tomorrow, drop me a PM about where u want to meet.
thanks. I cleared codes and adaptations with Inpa and with smooth1's free software. I have a coding cable too. Don't think I will need to come down anymore. Plus with black friday border line ups it would be ugly. Thanks anyways though. Maybe another time.
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      11-24-2012, 02:20 AM   #36
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We need the WOT! Plus some outside neutral revs!
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      11-25-2012, 12:59 AM   #37
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Ok....I'm not a cinematographer but here is an idle video and another one where I punched it. It is pretty evident that these things aren't loud at all. They change the sound ever so slightly.








*edited to add neutral revs.

Last edited by mapleridge; 11-25-2012 at 01:24 AM.
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      11-25-2012, 11:41 PM   #38
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Quote:
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Ok....I'm not a cinematographer but here is an idle video and another one where I punched it. It is pretty evident that these things aren't loud at all. They change the sound ever so slightly.








*edited to add neutral revs.
last video is private.
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      11-26-2012, 12:23 AM   #39
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fixed the last video.
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      11-26-2012, 01:40 AM   #40
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Looks like you found your noise level tolerance, I wonder how it would've sounded with the DA pipes. What pipes are you going to run with later?
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      11-26-2012, 02:00 AM   #41
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Looks like you found your noise level tolerance, I wonder how it would've sounded with the DA pipes. What pipes are you going to run with later?
I actually dyno'd with the stock exhaust and the Detail addict pipes did have gains in tq and hp over stock. It was negligible though. I figure deleting secondaries on the stock system would get me more gains than the DA setup. For now, I am enjoying the quiet. Once I dyno, these headers and if the power is there I will delete second cats too and if it gets too loud I will throw more resonators on. I like the single side outlet for now. If anything I would just change the oem outlets to fit my m3 rep. Swapping between bumpers is cool for now. A friend at the shop showed me how to uninstall the rear bumper in a flash so it's like switching underwear now.
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      11-26-2012, 02:11 AM   #42
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I actually dyno'd with the stock exhaust and the Detail addict pipes did have gains in tq and hp over stock. It was negligible though. I figure deleting secondaries on the stock system would get me more gains than the DA setup. For now, I am enjoying the quiet. Once I dyno, these headers and if the power is there I will delete second cats too and if it gets too loud I will throw more resonators on. I like the single side outlet for now. If anything I would just change the oem outlets to fit my m3 rep. Swapping between bumpers is cool for now. A friend at the shop showed me how to uninstall the rear bumper in a flash so it's like switching underwear now.
Haha awesome, hopefully doing some dyno runs too against my eisenmann and detail addict set up. Should've gone with the m-tech rear and remove the diffuser. That's what I'll end up doing while trying to figure out which exhaust end I want.
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      11-26-2012, 07:33 PM   #43
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Just finished installing my headers. Took me about 5 hours. Got to head to the exhaust shop tomorrow and get them connected to the mid pipes. Right now they are wide open and loud as hell haha!
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      11-26-2012, 09:06 PM   #44
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Just finished installing my headers. Took me about 5 hours. Got to head to the exhaust shop tomorrow and get them connected to the mid pipes. Right now they are wide open and loud as hell haha!
I thought you had adjustable flanges? Can't you bolt right up?
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