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      02-21-2014, 05:39 AM   #1
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BPMSport Stage II Exhaust "Burble" Teaser Video

We've had a few requests for this feature, and have looked into offering it to our customers.

There are many ways to achieve this in the calibration, and different methodologies of fueling, ignition timing, and exhaust camshaft position can be altered to modify the circumstances and characteristics.

It's important to ensure that this feature is safe for use over time. In essence, a loud pop promoted by changes in the calibration is an intentional misfire. Vehicles that have this feature in factory form have provisions and functions built into the operating code to achieve this result. For example, on vehicles with this feature built in, selective controls for activation and deactivation of fuel injection and ignition timing per cylinder are employed by the digital motor electronics unit. They go as far as to alter the strategy to account for position and stroke cycle at that moment. It's a "controlled" misfire in essence. The MSS60 control unit doesn't have such provisions.

Additionally, this has the possibility of reducing fuel consumption and increases emissions, with the potential of fouling oxygen sensors over extended periods. The strategy employed to achieve this sound can mitigate these effects to an extent. Another thing to keep in mind is the highly adaptive nature of this control unit. It's important to ensure that these changes will not cause unfavorable adaptations due to oxygen sensor data fed back to the control unit. Excessive exhaust gas temperatures can decrease the life of catalytic converters.

This is geared more toward catless vehicles but can be achieved on vehicles with aftermarket exhaust systems (preferably with the cat located further downstream from the header outlet).

That said, this is something we will offer to those that request it, but not until it's put though a series of tests ensuring that the positive characteristics outweigh any potential negative consequences. We'll post more videos, illustrating different types of sounds that can be made as this is tested. Most of the other projects we are working on are higher priority, please forgive any slow updates!



Just for fun, an X5M w/ downpipes and full Akra we tuned:

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Last edited by BPMSport; 02-21-2014 at 06:19 AM.
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      02-21-2014, 06:18 AM   #2
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*Reserved*
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      02-21-2014, 06:36 AM   #3
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Nice when I get another M3 I will have to get BPM again
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      02-21-2014, 08:35 AM   #4
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Definitely want the burbling when I get the stage2 tune
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      02-21-2014, 08:41 AM   #5
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Sub'd
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      02-21-2014, 08:49 AM   #6
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Subscribed! I want this feature
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      02-21-2014, 10:06 AM   #7
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sweet!
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      02-21-2014, 10:12 AM   #8
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lol
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      02-21-2014, 12:54 PM   #9
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Yes please.
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      02-21-2014, 03:22 PM   #10
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I'm over due for a fresh new mod
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      02-21-2014, 03:44 PM   #11
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Can't wait!
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      02-21-2014, 03:49 PM   #12
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      02-21-2014, 05:29 PM   #13
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Yup, want it.
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      02-21-2014, 05:54 PM   #14
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      02-21-2014, 08:06 PM   #15
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In! Care to say what else is in the pipeline?
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      02-21-2014, 09:23 PM   #16
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Interesting video, was the guy holding the camera hanging out of the passenger side window? Sounds sick tho!
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      02-21-2014, 09:26 PM   #17
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Quote:
Originally Posted by chris s View Post
lol
?
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      02-22-2014, 12:21 PM   #18
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Omg lol
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      02-22-2014, 01:34 PM   #19
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Personally one of the things I like about the S65 is the clean sound it has on overrun and free revving. Popping and crackling is so plebe, leave that foolishness to the common folk *twirls monocle*
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      02-22-2014, 05:06 PM   #20
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Quote:
Originally Posted by Richbot View Post
Personally one of the things I like about the S65 is the clean sound it has on overrun and free revving. Popping and crackling is so plebe, leave that foolishness to the common folk *twirls monocle*
I agree, although on the Jag it sounds awesome!
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      02-22-2014, 07:13 PM   #21
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Quote:
Originally Posted by edwinm3 View Post
Omg lol
Quote:
Originally Posted by chris s View Post
lol
lol x3
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      03-05-2014, 03:10 AM   #22
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Quote:
Originally Posted by Irishace View Post
Interesting video, was the guy holding the camera hanging out of the passenger side window? Sounds sick tho!
Yes, he was holding the iphone out the window. I had to play with youtube to rotate the video or it was painful to watch!

Quote:
Originally Posted by Richbot View Post
Personally one of the things I like about the S65 is the clean sound it has on overrun and free revving. Popping and crackling is so plebe, leave that foolishness to the common folk *twirls monocle*
Personally not a fan.

Quote:
Originally Posted by smellfish View Post
In! Care to say what else is in the pipeline?
Check out post #564 (toward middle of page):
http://www.m3post.com/forums/showthr...784717&page=15

Thanks everyone
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