North American 335d Post DPF Removal Exhaust Ideas

CO335D · 01-09-2015, 10:06 AM

Quote:

Originally Posted by iaknown

Actually got it a while back from a forum member. As far as I know it is just a standard M-Tech carbon diffuser for quads.

You could but it's not necessary. After playing around with different restrictor plates when initially trying to curb my overboost I am convinced you could run a single 2.5" exhaust on these cars without restricting anything.....so dual 3" is wayyyy overkill.

Ha! It's mine and my dad's shop and although we have a good variety of tools and a lot of cool projects have come out of it over the years it pretty much always looks like a bomb hit it lol

I am running high-flow "gas" 200 cells at the moment. No they are not ideal for a diesel (or that far back in the exhaust stream) but I am hoping at least some reaction occurs taking some of the edge off of the stank. We will see....

That makes sense. So do you have more future plans to change your set up? If so, what are you thinking about doing?

Also, any info where you sourced your cats and resonators?

Yozh · 01-12-2015, 07:02 PM

Quote:

Originally Posted by iaknown

Here is the latest revision to my exhaust. No mufflers, just high-flow cats and resonators. Hoping to get the car back on the road this weekend so I can hear the results....

Hey iaknown, are those the BMW Performance springs that I see there? Sorry for O/T.

TorqueAddict · 01-12-2015, 11:09 PM

Axel sent me this video and asked if i could post it, so here you go guys:

iaknown · 01-12-2015, 11:20 PM

Quote:

Originally Posted by CO335D

That makes sense. So do you have more future plans to change your set up? If so, what are you thinking about doing?

Also, any info where you sourced your cats and resonators?

As long as the sound is how I expect it to be I'm done with it.

The resonators were already on the exhaust as you can see in my earlier pics. I got the cats from mandrelbendingsolutions.com

I am still planning to have these made guys, should hear something about the first prototype within the next few months. The production exhausts won't have cats, that is something I am experimenting with on my own with this exhaust....

Quote:

Originally Posted by Yozh

Hey iaknown, are those the BMW Performance springs that I see there? Sorry for O/T.

I have a KW V1 suspension on the car all around.

Puerto Rican 335d · 01-13-2015, 12:02 PM

gracias Torque

TorqueAddict · 01-13-2015, 04:18 PM

Quote:

Originally Posted by Puerto Rican 335d

gracias Torque

No Problem man.

iaknown · 01-21-2015, 01:15 PM

For those who asked.....Finally got my car back on the road. The cats do cut down on the stink. Definitely doesn't smell like a clean diesel with them, but it doesn't smell like my truck either

The exhaust/turbos are still very audible too so I think I've accomplished my intended purpose.

As far as inside, I do get a slight drone when cruising in 5th at certain rpm's but only a specific range and in 6th it goes away. Sounds sweet when I get on it so overall I am happy. The resonators probably would be more effective farther forward in the exhaust but they're staying where they are. Time to concentrate on other things.....

Puerto Rican 335d · 01-21-2015, 02:09 PM

funny I dont have the drone feeling in my car i wonder if its because its 3" all the way thru the mufflers w 4" exits. Any way another fellow 335d will be in the Island by the end of the month and he will be seated in my car and will give both bad and good reviews about my car. Will keep you guys posted

iaknown · 01-21-2015, 02:14 PM

Quote:

Originally Posted by Puerto Rican 335d

funny I dont have the drone feeling in my car i wonder if its because its 3" all the way thru the mufflers w 4" exits. Any way another fellow 335d will be in the Island by the end of the month and he will be seated in my car and will give both bad and good reviews about my car. Will keep you guys posted

You have mufflers, probably why. I didn't have the drone with mufflers either. But I wanted my car louder

TDIwyse · 01-21-2015, 02:18 PM

Quote:

Originally Posted by iaknown

For those who asked.....Finally got my car back on the road. The cats do cut down on the stink. Definitely doesn't smell like a clean diesel with them, but it doesn't smell like my truck either

The exhaust/turbos are still very audible too so I think I've accomplished my intended purpose.

As far as inside, I do get a slight drone when cruising in 5th at certain rpm's but only a specific range and in 6th it goes away. Sounds sweet when I get on it so overall I am happy. The resonators probably would be more effective farther forward in the exhaust but they're staying where they are. Time to concentrate on other things.....

Thanks for the update and the comments on the cat's. Been thinking about putting something like that back into my system... Do you have a source for the converters you're using. I see magnaflow has a whole bunch on their site, and one "universal" catalyst that's supposed to fit the 335d.

http://www.magnaflow.com/02catalytic...niversal=60105

DWR · 01-21-2015, 03:10 PM

Quote:

Originally Posted by Puerto Rican 335d

funny I dont have the drone feeling in my car i wonder if its because its 3" all the way thru the mufflers w 4" exits. Any way another fellow 335d will be in the Island by the end of the month and he will be seated in my car and will give both bad and good reviews about my car. Will keep you guys posted

Driver's seat, right?

DWR · 01-21-2015, 03:37 PM

Quote:

Originally Posted by iaknown

For those who asked.....Finally got my car back on the road. The cats do cut down on the stink. Definitely doesn't smell like a clean diesel with them, but it doesn't smell like my truck either

The exhaust/turbos are still very audible too so I think I've accomplished my intended purpose.

As far as inside, I do get a slight drone when cruising in 5th at certain rpm's but only a specific range and in 6th it goes away. Sounds sweet when I get on it so overall I am happy. The resonators probably would be more effective farther forward in the exhaust but they're staying where they are. Time to concentrate on other things.....

First, contrats. All that matters is that you are happy.
I like it quiet and loud, if you know what I mean. Contemplating a large downpipe wastegate. Not turbo control, but exhaust backpressure relief. That way the only diesel smell will be for folks that need to be in my rear view mirror.

Puerto Rican 335d · 01-21-2015, 04:36 PM

Ok Derek I'll ket u drive it

TDIwyse · 01-21-2015, 05:54 PM

iaknown, is this the place you sourced the cats from?

http://www.mandrelbendingsolutions.c...ers/Categories

iaknown · 01-21-2015, 11:50 PM

Quote:

Originally Posted by TDIwyse

iaknown, is this the place you sourced the cats from?

http://www.mandrelbendingsolutions.c...ers/Categories

That's the place. They have quite a selection...

Puerto Rican 335d · 01-22-2015, 09:22 AM

gracias Iaknown was looking for something like that for e30 M3 since it has no cat and has race headers.

TDIwyse · 01-22-2015, 10:10 AM

Quote:

Originally Posted by iaknown

That's the place. They have quite a selection...

Thanks.

DWR · 01-23-2015, 09:23 PM

Quote:

Originally Posted by iaknown

That's the place. They have quite a selection...

Very nice.

2deerwhistlers · 01-26-2015, 02:44 PM

Quote:

Originally Posted by TDIwyse

iaknown, is this the place you sourced the cats from?

http://www.mandrelbendingsolutions.c...ers/Categories

I'm getting pressure to build a downpipe with a catalyst in it..

TDIwyse · 01-26-2015, 02:54 PM

Quote:

Originally Posted by 2deerwhistlers

I'm getting pressure to build a downpipe with a catalyst in it..

That would be interesting. I've occassionally played with the idea of putting the gutted DPF, which still has the DOC in place, back in. However it's such a pain to remove the motor mount and assorted crap to get it back in there...

If you could make one that could be installed without having to remove the motor mount, I may be interested ...

Yozh · 02-09-2015, 02:08 PM

After gutting my SCR and manhandling the factory exhaust, I wanted to ask if there was an idea to start building the exhaust kits for our cars. The oem piece is so heavy and convoluted it is ridiculous. I thought someone hinted on that before, unless I'm mistaken. I'm either going to wait, do a mufferectomy or build my own.

iaknown · 02-09-2015, 03:18 PM

Quote:

Originally Posted by Yozh

After gutting my SCR and manhandling the factory exhaust, I wanted to ask if there was an idea to start building the exhaust kits for our cars. The oem piece is so heavy and convoluted it is ridiculous. I thought someone hinted on that before, unless I'm mistaken. I'm either going to wait, do a mufferectomy or build my own.

Yes, it's in the works. The prototype is at the manufacturer's factory now. We're probably looking at spring/summer realistically though if you can wait.

01-12-2015, 11:09 PM	#113
TorqueAddict Lieutenant 172 Rep 494 Posts Drives: 340i - 335D Join Date: Oct 2013 Location: Barrie, ON iTrader: (0)	Axel sent me this video and asked if i could post it, so here you go guys:
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01-13-2015, 12:02 PM	#115
Puerto Rican 335d Brigadier General 236 Rep 3,488 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	gracias Torque __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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01-21-2015, 01:15 PM	#117
iaknown Banned 427 Rep 1,036 Posts Drives: 335D Join Date: May 2013 Location: NJ iTrader: (1)	For those who asked.....Finally got my car back on the road. The cats do cut down on the stink. Definitely doesn't smell like a clean diesel with them, but it doesn't smell like my truck either The exhaust/turbos are still very audible too so I think I've accomplished my intended purpose. As far as inside, I do get a slight drone when cruising in 5th at certain rpm's but only a specific range and in 6th it goes away. Sounds sweet when I get on it so overall I am happy. The resonators probably would be more effective farther forward in the exhaust but they're staying where they are. Time to concentrate on other things.....
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01-21-2015, 02:09 PM	#118
Puerto Rican 335d Brigadier General 236 Rep 3,488 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	funny I dont have the drone feeling in my car i wonder if its because its 3" all the way thru the mufflers w 4" exits. Any way another fellow 335d will be in the Island by the end of the month and he will be seated in my car and will give both bad and good reviews about my car. Will keep you guys posted __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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01-21-2015, 04:36 PM	#123
Puerto Rican 335d Brigadier General 236 Rep 3,488 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	Ok Derek I'll ket u drive it
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01-21-2015, 05:54 PM	#124
TDIwyse Colonel 627 Rep 2,408 Posts Drives: 2011 335d Join Date: Aug 2012 Location: MidWest iTrader: (0)	iaknown, is this the place you sourced the cats from? http://www.mandrelbendingsolutions.c...ers/Categories __________________ 2011 335d 11.68 @ 125.71 mph 1/4 mile NHRA certified track Ram Cummins with lots-o-mods
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01-22-2015, 09:22 AM	#126
Puerto Rican 335d Brigadier General 236 Rep 3,488 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	gracias Iaknown was looking for something like that for e30 M3 since it has no cat and has race headers. __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
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02-09-2015, 02:08 PM	#131
Yozh Colonel 881 Rep 2,611 Posts Drives: 2011 335d M-Sport Join Date: Mar 2014 Location: Wet Coast iTrader: (4)	After gutting my SCR and manhandling the factory exhaust, I wanted to ask if there was an idea to start building the exhaust kits for our cars. The oem piece is so heavy and convoluted it is ridiculous. I thought someone hinted on that before, unless I'm mistaken. I'm either going to wait, do a mufferectomy or build my own.
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