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Old Wed, Sep-13-2017, 06:23:21 PM   #31
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Default Re: Buildjournal Exhaust Backfire Tune

Im still on the fence about doing this to my SC'd car. Will it affect the SC tune in any way? Making it go too lean or rich? Noob question.
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Old Sat, Oct-14-2017, 12:15:30 AM   #32
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Default Re: Buildjournal Exhaust Backfire Tune

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Originally Posted by AndrewReaganM View Post
I just flashed the most aggressive version to my SMG M3 with aftermarket headers, and stock section 1,2, and 3.



I didn't notice any difference from the burble option available in the previous version though. A friend follow me to see if it was shooting any flames and it was not. I'm not sure why though. Maybe it has something to do with the rev-matching of the SMG system? I still get a lot of decently loud pops but no flames or loud pops.



Anyone have any ideas?


With headers and stock section 1, 2 and 3 I was unsuccessful with flames, I believe you need to have a aftermarket section 3. I now have a billy boat exhaust and I have yet to setup the GoPro.

To pop flames you must drive and heat up exhaust for 5-10 min. 50-75% throttle to 4k in 2nd gear. As soon as you let go of throttle, begin to do light taps on throttle repeatedly as RPM drops. Then try 100% throttle to 6k and tap throttle, same as above, as RPM drops.

The burble is caused by extra fuel being dumped into the exhaust so the taps basically do just that, it releases more fuel that ignites. Modern day cars don't require taps because of the nature of current day technology and tuning. That's where some of the misconception of burbles just on throttle lift comes in.
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Old Wed, Jun-27-2018, 12:17:55 AM   #33
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Default Re: Buildjournal Exhaust Backfire Tune

Will the new ignition based cut off aid in burble directly from lift off?


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Old Wed, Jul-04-2018, 07:03:37 AM   #34
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Default Re: Buildjournal Exhaust Backfire Tune

Has anyone noticed flatspot/loss of power from enabling the burble?
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Old Wed, Jul-04-2018, 01:22:10 PM   #35
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Default Re: Buildjournal Exhaust Backfire Tune

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Originally Posted by JuicyM3 View Post
Has anyone noticed flatspot/loss of power from enabling the burble?
Yes I did with my SMG.

Soon as I turned it off again, it was back to full power and instant response.

It did seem better (less noticeable) with a decat and the egt sensor disabled.

Sorry that was with normal pops and bangs, not the build journal version (I never bothered to try them).
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Discussing Buildjournal Exhaust Backfire Tune in the Coding and Tuning Forum - Discuss all avenues of coding and tuning here! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)