[PencilGeek]

I waited five months for the Amuse Ericsson M480 Titanium exhaust to arrive, and when it did, I didn't have time to dyno test it. Now that SEMA is over, I put aside some time to dyno test the exhaust. Though the horsepower gains are modest, the torque gains are VERY impressive.

Purchase and Installation
Purchased at Bulletproof Automotive, and installed at Auto Talent in Los Angeles. The installation went off without a hitch. At first we thought Ericsson failed to ship a special bracket because 'Socale92's' exhaust was slightly different. But once we got it up in the air and installed, nothing was missing.

Sound
The sound of the exhaust is throatier than the original. Inside the cockpit, it is still very quiet (just what I wanted). Even though M3Post user 'Socale92' installed his Ericsson M480, mine most likely sounds slightly different because his incorporated Stainless Steel midpipes, and mine was full Titanium.

There is no 'drone' so to speak of. A drone is most likely caused by a resonant frequency in the exhaust. The only such 'drone' appears between 2500-3000 RPMs, and only when the car is under load (even a moderate load). By 3300 RPMs, the 'drone' is completely gone.

Under strong load, the exhaust sounds great, inside and out. Unfortunately I do not have video or sound clips of the exhaust due to the very late time of night we finished the work. And equally unfortunate, due to the car being shipped to Las Vegas for SEMA, I won't have a chance to take any video/sound clips until it returns. Zolti at Auto Talent did take some late night video clips, and hopefully will post them in response to this thread.

Video/sound clip:
http://www.youtube.com/watch?v=mF0gu4mBlzU

Weight
Stock
Center Pipe ______ 40.0 lbs
X-Bracket ________ _1.4 lbs
Muffler __________ 54.0 lbs
Total: =========== 95.4 lbs

Ericsson M480 Titanium
X-pipe ___________ _9.4 lbs
Center Left ______ _4.3 lbs
Center Right _____ _4.2 lbs
Cat Left _________ _5.6 lbs
Cat Right ________ _5.7 lbs
Muffler __________ 22.0 lbs
Gasket Kit _______ _0.5 lbs
Total ============ 51.7 lbs

Total Weight Savings: 43.7 lbs


Dyno Results
I've built many cars with many performance mods. I've never felt any seat of the pants gain with any mod I've ever done. That is, until this one. To me, there seemed like a noticeable amount of extra power in the upper RPMs. I've already tested two different ECU upgrades (with the Active Autowerke's ECU upgrade installed right now). The AA ECU upgrade already added quite a bit of power to the top end, but with the addition of the Ericsson M480 exhaust, the motor seems to breath much easier, and the power seems noticeably stronger. As it turns out, seat-of-the-pants dynos are deceiving. I seemed to notice the most power in the upper RPMs, but when you look at these dyno results, you'll notice that there is a HUGE amount of torque being generated at the bottom end.

Date: 2008-11-22
Time: 12:17 PM
Temperature: 75 degrees
Pressure: 29.885 - 29.889
Humidity: 39.8% - 40.04%
Correction: 3.2% - 3.4%


Download

• Dynapack Dyno files
• Excel Spreadsheet of corrected results and graphs (Excel 2007 format)
• Read product review

Baseline Configuration

• E92 M3
• 91 Octane gasoline
• Active Autowerke ECU
• Evo Sport pulley
• Gruppe-M Cold Air Intake
• TQ: 268 ft/lbs @ 3923 RPM
• HP: 369 hp @ 8070 RPM

Measured Results

• TQ: 276 ft/lbs @ 3858 RPM
• HP: 374 hp @ 7982 RPM

Peak Performance Increase

• TQ: 37.21 ft/lbs @ 2506 RPM
• HP: 18.29 hp @ 2649 RPM

Graphs:


Individual Results:


Torque Gains vs. RPM:


Horsepower Gains vs. RPM:


Comparing torque to baseline:


It might be tempting to think that 37 ft/lbs torque increase is a fluke, or that those results were somehow fabricated. On the dyno, I ran seven different runs and only selected three for reporting purposes. Above are the torque results of all seven runs and compared against the torque baseline. From looking at at this graph above, it should be clear that 37 ft/lbs torque gain at 2500 RPMs is not a fluke and does not deviate very far from all seven dyno runs.


Pictures
Enjoy...

[endofanera7]

WOW! Sounds and looks amazing! But too pricey!

[Daddyo]

Nice gains and nice vid.

Are those cats or resonators?

[PencilGeek]

Originally Posted by Daddyo

Nice gains and nice vid.

Are those cats or resonators?

Both. The cats are not shown up close. You can see the cats in the last (blurry) picture in the original post. They look like the tubing changes color and gets shiney -- up closest to the engine.

[Daddyo]

Thanks.

Are there only 2 cat's for this car or are there 2 more after the headers?

You should be able to feel that torque increase down low. That's a HUGE improvement down there, especially considering many exhausts drop torque down low.

[leletyM3]

This is so amazing....if money wasn't an issue!

[///M3__4__Life]

that pipe is sexy....awsome!

[M3 Sedan JPS]

damn Robert... i never imagined +37 when you told me. i was thinking maybe +15 but i'm amazed!

[NoM3ForMe]

Love that sound, and damn those tips are huge!

[Porshapwr]

Sounds fantastic.