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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 05-20-2012, 12:10 AM   #1
Canuck604
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Join Date: Mar 2012
Location: Vancouver
Posts: 103
My Ride: 2004 325ci
Sound comparison (video): Eisenmann Race Exhaust, Ebay Headers vs. stock.



A three-video comparison of my 2004 BMW 325CI e46 featuring the Eisenmann race exhaust, ebay headers, and both resonators deleted. Clip 1: full stock. Clip 2: Eisenmann race exhaust installed, stock headers, rear resonator deleted. Clip 3: ebay headers installed, middle resonator deleted, no cats. Note: in the second clip, the exhaust wasn't broken in yet (clip was taken 10 mins after install).

This car is extremely loud when I open up on the road. There is a significant amount of drone, but I plan to install high-flow cats soon (shop just didn't have enough time to install them). Install performed by Budget Brake and Muffler in Coquitlam, BC (on Brunette) by Rob and his team. Excellent shop and bunch of talented and honest guys working there (highly recommend them if you're in Vancouver).

Car is simply too loud without the cats, and I'm pumping out smelly fumes, but will remedy this soon. Post O2 sensors couldn't fit, zap-strapped them up (for now). Yes, I threw a CEL, but doesn't affect performance. Post O2 sensors just monitor the cats. Can have CEL removed via tuning or may attempt to stretch the wiring of the sensors to fit past the new cats i install, but might still throw a 'delay' code due to distance. Or could also try LC-1 solution... When i put the cats in, it will decrease the performance slightly and will reduce the sound noticeably. Hopefully it will be at an acceptable level so I don't go deaf (no wonder this exhaust is illegal in Germany).

Note: Sorry for the mono audio in clip 2. Didn't plug the mic all the way in. Still, the audio is better than 99% of the exhaust clips on youtube which distort the experience by shoving the camera right up close to the tips... any camera put close to the tips will make it sound aggressive. I know most people say that their car sounds deeper/throatier in person when compared to youtube videos, but in my case it's true, the car is insanely loud, which isn't captured quite accurately in the video.

The ebay headers weren't originally lining up with the mid-pipe flanges. Guys had to rotate one of the pipes to align with the angle of the headers. Fortunately, we were in the process of deleting the middle resonator so the cut had to be made anyway, once cut they were able to rotate the pipe appropriately and then weld back.


Drive safe, respect the road, and respect the style and taste preferences of other car enthusiasts.


Stock cats so restrictive...


The all-spark! My Beemer's going to transform now.


Both resonators deleted


Reinforcing the welds after removing middle resonator


Another shot of the resonators removed


New meets old

Last edited by Canuck604; 05-20-2012 at 12:34 AM.
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Old 05-20-2012, 02:35 PM   #2
sedanpowersc
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Join Date: Apr 2011
Location: South Carolina
Posts: 670
My Ride: 330i 5 speed
That's not eisenmann exhaust, thats stock exhaust with no resonators and an eisenmann muffler...
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Old 05-20-2012, 08:02 PM   #3
Grande D
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Join Date: Dec 2006
Location: Dirty South
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My Ride: E90 M-Sport
It looks great and sounds good! Thanks for the heads-up via PM, I appreciate it!

sedanpowersc... the "full" Eisenmann exhaust is just the muffler with straight pipes called "connecting pipes" from the headers to the muffler, go look it up. He has the same thing.
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Old 05-21-2012, 11:57 AM   #4
sedanpowersc
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They connect with an "H" but other than that yes it's straight, but that still doesnt make his exhaust an eisenmann just because it's straight, its a custom exaust with an eisenmann muffler
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Old 05-21-2012, 10:23 PM   #5
Canuck604
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Join Date: Mar 2012
Location: Vancouver
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My Ride: 2004 325ci
You are all correct, yet incorrect, depending on the audience. Car enthusiasts typically define exhaust as a complete system. With this definition, mine is not a complete system. I was using the language of the manufacturers, which refer to the muffler portion as exhaust, just to cater to the lowest common denominator consumer, who doesn't honestly care about the semantic difference. And in that sense I'm correct, yet also incorrect. The reason why I'm pointing this out is to show just how absurd this conversation is . vroom vroom.
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Old 05-22-2012, 02:08 AM   #6
sedanpowersc
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Quote:
Originally Posted by Canuck604 View Post
You are all correct, yet incorrect, depending on the audience. Car enthusiasts typically define exhaust as a complete system. With this definition, mine is not a complete system. I was using the language of the manufacturers, which refer to the muffler portion as exhaust, just to cater to the lowest common denominator consumer, who doesn't honestly care about the semantic difference. And in that sense I'm correct, yet also incorrect. The reason why I'm pointing this out is to show just how absurd this conversation is . vroom vroom.
I'm not hating on your car or anything bro, sounds but just pointing that out to anyone who doesnt know and wants to replicate sound
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