(NEED ADVICE) New Exhaust set-up UPDATED

Amini77 · 08-22-2014, 07:01 PM

I just had my primary cats taken off and replaced it with a straight pipe. Before this I had a:

-Remus Powersound muffler
-Secondary Cat Delete
-Resonator Delete
-2.5 inch single pipe from headers back

UPDATE

I loved the sound of it but I wanted more power so I removed the primary cats from of my headers. It was way too raspy after with almost no restrictions so I added a Magnaflow Glasspack, and its still a little raspy.

After adding the glasspack for some backpressure it still feels like theres no low end torque. And according to my OBD scanner the engine is limiting torque (Error code: 2D5A). I'm getting a re-tune when I figure out the perfect setup so I want to have as much airflow as possible without losing too much back pressure. Basically, the glasspack isn't doing enough so here are my options:

-keep the glasspack and add high-flow secondaries
or
-delete the glass-pack and add high-flow secondaries
or
-replace glasspack with a more restrictive resonator (suggestions please)

I want optimum back pressure and flow.

I'll get a video when I can, my car has been in and out of the shop because of problems with the front axles.

#Tee · 08-22-2014, 07:04 PM

sounds wayyyyyy better than the pe and vanguard

Taskmaster · 08-22-2014, 07:32 PM

Quote:

Originally Posted by Amini77

I just had my primary cats taken off and replaced it with a straight pipe. Before this I had a:

-Remus Powersound muffler
-Secondary Cat Delete
-Resonator Delete
-2.5 inch single pipe from headers back

Here's what it sounded like a while ago:

I loved the sound of it but I wanted more power so I removed the primary cats from of my headers. It was WAY too raspy especially at 3,000 RPM. To try to fix it I had a Magnaflow Glasspack put on as a resonator. It got rid of a lot of the drone and rasp throughout the rev range but at 3,000rpm it was still bad.

And according to an OBD scanner my engine is cutting torque because of minimal back pressure, hence why I added a glasspack. Now its still too loud I was wondering if I should add a high-flow secondary cat. I'm getting a re-tune when my decision is made so I want to have as much airflow as possible without losing too much back pressure and being too obnoxiously loud. Should I:

-keep the glasspack and add high-flow secondaries
or
-delete the glass-pack and add high-flow secondaries
or
-leave as is and get used to it.

I want optimum back pressure and flow.

I'll get a video when I can, my car has been in and out of the shop because of problems with the front axles.

That makes no sense.

Amini77 · 08-22-2014, 08:11 PM

Quote:

Originally Posted by TheAxiom

That makes no sense.

Exactly what part so I can clarify better.

Amini77 · 08-22-2014, 09:48 PM

Quote:

Originally Posted by #Tee

sounds wayyyyyy better than the pe and vanguard

Haha can't tell if sarcasm...

#Tee · 08-22-2014, 10:45 PM

no its real, those other 2 sounds like gutless hondas on every clip ive seen on yt

Amini77 · 08-22-2014, 10:51 PM

Quote:

Originally Posted by #Tee

no its real, those other 2 sounds like gutless hondas on every clip ive seen on yt

Ohh well then thank you!

PureE92 · 08-22-2014, 11:59 PM

sounds nice brah

Taskmaster · 08-23-2014, 11:22 AM

Quote:

Originally Posted by Amini77

Exactly what part so I can clarify better.

The part about back pressure.

hassmaschine · 08-23-2014, 11:37 AM

Back pressure does NOT make torque.

Taskmaster · 08-23-2014, 01:43 PM

Quote:

Originally Posted by hassmaschine

Back pressure does NOT make torque.

That's my point.

E46driver · 08-23-2014, 02:18 PM

Wow.... Sounds great

b-man · 08-23-2014, 04:59 PM

Back pressure shouldn't be a problem on na engines, as far as I know.

I would have left the primaries on and tried a different muffler

Route 16 · 08-23-2014, 06:41 PM

I have always liked the idea of all catless. But i remember on the m3 forums. The guy wanted catless sound, without sacrificing smell and power. Keeping the primary cat shells and fitting high flow/performance cats would be my suggestion. I want to do the same but i just dont know if it'll be the same result with the current cats.

Amini77 · 08-23-2014, 06:50 PM

Quote:

Originally Posted by Route 16

I have always liked the idea of all catless. But i remember on the m3 forums. The guy wanted catless sound, without sacrificing smell and power. Keeping the primary cat shells and fitting high flow/performance cats would be my suggestion. I want to do the same but i just dont know if it'll be the same result with the current cats.

It smells like one of those gas powered go-karts where ever I go lol I'll get a video up soon.

Taskmaster · 08-23-2014, 09:18 PM

Quote:

Originally Posted by Route 16

I have always liked the idea of all catless. But i remember on the m3 forums. The guy wanted catless sound, without sacrificing smell and power. Keeping the primary cat shells and fitting high flow/performance cats would be my suggestion. I want to do the same but i just dont know if it'll be the same result with the current cats.

You're just better off buying AFE headers or Euro headers. The stock manifolds are crap, the primaries are too short, the merge is terrible, etc etc. Essentially anything is better than those boat anchors.

Route 16 · 08-23-2014, 09:59 PM

Quote:

Originally Posted by TheAxiom

You're just better off buying AFE headers or Euro headers. The stock manifolds are crap, the primaries are too short, the merge is terrible, etc etc. Essentially anything is better than those boat anchors.

All true.

Tim07e90 · 08-24-2014, 12:11 AM

Quote:

Originally Posted by TheAxiom

Quote:

Originally Posted by Route 16

I have always liked the idea of all catless. But i remember on the m3 forums. The guy wanted catless sound, without sacrificing smell and power. Keeping the primary cat shells and fitting high flow/performance cats would be my suggestion. I want to do the same but i just dont know if it'll be the same result with the current cats.

You're just better off buying AFE headers or Euro headers. The stock manifolds are crap, the primaries are too short, the merge is terrible, etc etc. Essentially anything is better than those boat anchors.

Yup, exactly. I'm planning on buying AFE headers to pair with my AFE mid pipes, resonator delete and custom quad set up.

Route 16 · 08-24-2014, 01:17 AM

Quote:

Originally Posted by Tim07e90

Yup, exactly. I'm planning on buying AFE headers to pair with my AFE mid pipes, resonator delete and custom quad set up.

Has anyone fitted/reviewed the AFE headers yet?

Tim07e90 · 08-24-2014, 01:20 AM

Quote:

Originally Posted by Route 16

Quote:

Originally Posted by Tim07e90

Yup, exactly. I'm planning on buying AFE headers to pair with my AFE mid pipes, resonator delete and custom quad set up.

Has anyone fitted/reviewed the AFE headers yet?

Budvlad on here did it. He said it went in perfect and it sounded great. I agree that full catless sounds too raspy. These seem to be a great alternative.

Mike. · 08-24-2014, 04:58 AM

Quote:

Originally Posted by Tim07e90

Budvlad on here did it. He said it went in perfect and it sounded great. I agree that full catless sounds too raspy. These seem to be a great alternative.

he tried the afe catted headers? wow I thought no one tried these yet..is there a review thread?

edit i posted a lot in the thread... smh

triple edit- he never posted a review really

Tim07e90 · 08-24-2014, 09:13 AM

Quote:

Originally Posted by Emozoo

Quote:

Originally Posted by Tim07e90

Budvlad on here did it. He said it went in perfect and it sounded great. I agree that full catless sounds too raspy. These seem to be a great alternative.

he tried the afe catted headers? wow I thought no one tried these yet..is there a review thread?

edit i posted a lot in the thread... smh

triple edit- he never posted a review really

Search Afe headers and you'll find his review

08-22-2014, 07:01 PM	#1
Amini77 Brigadier General 186 Rep 4,732 Posts Drives: Alpine White '13 550i Join Date: Nov 2011 Location: Tarzana, CA iTrader: (1) Garage List 2013 BMW 550i [0.00]	(NEED ADVICE) New Exhaust set-up UPDATED I just had my primary cats taken off and replaced it with a straight pipe. Before this I had a: -Remus Powersound muffler -Secondary Cat Delete -Resonator Delete -2.5 inch single pipe from headers back UPDATE I loved the sound of it but I wanted more power so I removed the primary cats from of my headers. It was way too raspy after with almost no restrictions so I added a Magnaflow Glasspack, and its still a little raspy. After adding the glasspack for some backpressure it still feels like theres no low end torque. And according to my OBD scanner the engine is limiting torque (Error code: 2D5A). I'm getting a re-tune when I figure out the perfect setup so I want to have as much airflow as possible without losing too much back pressure. Basically, the glasspack isn't doing enough so here are my options: -keep the glasspack and add high-flow secondaries or -delete the glass-pack and add high-flow secondaries or -replace glasspack with a more restrictive resonator (suggestions please) I want optimum back pressure and flow. I'll get a video when I can, my car has been in and out of the shop because of problems with the front axles. Last edited by Amini77; 08-25-2014 at 10:32 PM..
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08-22-2014, 07:04 PM	#2
#Tee Major General 557 Rep 5,367 Posts Drives: yes Join Date: Oct 2011 Location: Socal iTrader: (2)	sounds wayyyyyy better than the pe and vanguard __________________ You can follow my builds on IG: Tee212
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08-22-2014, 10:45 PM	#6
#Tee Major General 557 Rep 5,367 Posts Drives: yes Join Date: Oct 2011 Location: Socal iTrader: (2)	no its real, those other 2 sounds like gutless hondas on every clip ive seen on yt __________________ You can follow my builds on IG: Tee212
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08-22-2014, 11:59 PM	#8
PureE92 First Lieutenant 90 Rep 314 Posts Drives: E92 Join Date: Sep 2012 Location: Texas iTrader: (0)	sounds nice brah
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08-23-2014, 11:37 AM	#10
hassmaschine Major General 3966 Rep 7,215 Posts Drives: "NBO" 330i Join Date: Jun 2014 Location: earth iTrader: (0)	Back pressure does NOT make torque.
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08-23-2014, 02:18 PM	#12
E46driver Captain 78 Rep 739 Posts Drives: 2009 E92 N51 328i Join Date: Jan 2012 Location: Rowland Heights iTrader: (4)	Wow.... Sounds great __________________ 2009 Alpine White E92 N51 328i Automagic \| Premium & Sport Pkg. \| Coral Red/Black Dakota Leather Interior \| M-Spor \| BMW Performance Exhaust \| Active Autowerke Headers \| BBS CH-R \| CPS Front Lip \| Performance Front Grills \| 888Concepts Custom Headlights (GONE) 2011 Alpine White E90 N55 335i Automagic
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08-23-2014, 04:59 PM	#13
b-man Major 604 Rep 1,090 Posts Drives: 328xi Join Date: Jan 2013 Location: maine iTrader: (2)	Back pressure shouldn't be a problem on na engines, as far as I know. I would have left the primaries on and tried a different muffler
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08-23-2014, 06:41 PM	#14
Route 16 I got lei'd 844 Rep 7,593 Posts Drives: '10 E90 M3 Join Date: Sep 2011 Location: Dark Side of the Moon iTrader: (62)	I have always liked the idea of all catless. But i remember on the m3 forums. The guy wanted catless sound, without sacrificing smell and power. Keeping the primary cat shells and fitting high flow/performance cats would be my suggestion. I want to do the same but i just dont know if it'll be the same result with the current cats.
	Appreciate 0 Quote