Burble/backfire tune

svinfinity · 04-12-2017, 01:54 PM

I'm thinking about opting for burble/backfire on a tune and want to know if there are any negative effects. Will it roast o2 sensors, increase fuel in oil? I've been searching around and saw a blackstone report on an e60 m5 showing increased fuel in the oil after the burble tune. Also read that this kills your o2 sensors? Obviously the tune companies will deny and claim it's harmless. Looking for feedback....

http://www.m5board.com/vbulletin/e60...ne-change.html

SYT_Shadow · 04-12-2017, 01:56 PM

I thought some tuners went as far as to say that it would roast your primary cats. Not a concern if you're catless of course

I have a standard, non burble tune. I can't imagine it's good for the engine to throw extra fuel there. At a minimum, the exhaust valves will be much hotter now

svinfinity · 04-12-2017, 03:15 PM

I'm catless so it won't be an issue but my concern is the damage done to the o2 sensors and possible engine harm.

Quote:

Originally Posted by SYT_Shadow

I thought some tuners went as far as to say that it would roast your primary cats. Not a concern if you're catless of course

I have a standard, non burble tune. I can't imagine it's good for the engine.

BPMSport · 04-12-2017, 05:52 PM

I don't recommend it.

Redd · 04-12-2017, 07:59 PM

Been on Mike's burble tune for over a year now, no problems. No lambda issues, though my car is completely decatted. Haven't done a Blackstone, but I don't see how fuel can get into oil of your piston rings are healthy.

That said, I had to beg Mike to sell it to me. Like he says, he doesn't recommend it. But I love the burbles!

svinfinity · 04-12-2017, 11:35 PM

Quote:

Originally Posted by Mike Benvo

I don't recommend it.

Are there reasons why you don't recommend it?

doogee · 04-13-2017, 07:51 AM

Sounds far too artificial and exaggerated in my opinion.

dparm · 04-13-2017, 07:56 AM

This whole backfire/burble/crackling thing is basically just unspent fuel detonating in the exhaust manifolds and cats, as I understand it. There's no way it's good for the cats or oxygen sensors.

On a more subjective level, I find it annoying and it doesn't really match the character of the M3.

HomoPirate · 04-13-2017, 08:29 AM

I find these burbles and pops during engine overrun fit newer turbo engine better than our v8. At least they came with factory lol

svinfinity · 04-13-2017, 10:30 AM

I've inquired about the this feature with a certain tune company and shop and they claim its perfectly safe.

jcolley · 04-14-2017, 07:41 AM

Low (relative) cylinder pressures at combustion, increased (also relative due to low cylinder pressure) blow by during compression stroke, additional fuel. Fuel goes right by the rings to some degree.

I've seen several people with this option in their tune report similar UOA results with different tuning vendors.

Of concern to me would be the nature of an Alusil cylinder bore's design and to retain an oil film for ring lubrication and the effects on ring/bore wear.

A tuning company claiming "perfectly safe" and backing it up with data and warranty are different things.

Props to Mike for his recommendation.

04-12-2017, 01:54 PM	#1
svinfinity First Lieutenant 66 Rep 383 Posts Drives: E92 JEREZ M3 Join Date: Mar 2015 Location: Fort lee nj iTrader: (0)	Burble/backfire tune I'm thinking about opting for burble/backfire on a tune and want to know if there are any negative effects. Will it roast o2 sensors, increase fuel in oil? I've been searching around and saw a blackstone report on an e60 m5 showing increased fuel in the oil after the burble tune. Also read that this kills your o2 sensors? Obviously the tune companies will deny and claim it's harmless. Looking for feedback.... http://www.m5board.com/vbulletin/e60...ne-change.html Last edited by svinfinity; 04-12-2017 at 02:33 PM..
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04-12-2017, 01:56 PM	#2
SYT_Shadow ///M Powered for Life 12760 Rep 11,154 Posts Drives: E90M/E92M/M4GTS/M4GT4/M6/X5M Join Date: Sep 2010 Location: Greenwich, CT iTrader: (2)	I thought some tuners went as far as to say that it would roast your primary cats. Not a concern if you're catless of course I have a standard, non burble tune. I can't imagine it's good for the engine to throw extra fuel there. At a minimum, the exhaust valves will be much hotter now __________________ DIY: S65 Rod Bearings E9X PFC Z54 BBK on F8X BK harness bar + seats: fit 6 tires in an M3 do88 Cooling Goodies GTS Twins: GTMore project Last edited by SYT_Shadow; 04-12-2017 at 03:57 PM..
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04-12-2017, 05:52 PM	#4
BPMSport BimmerPost Supporting Vendor 3592 Rep 7,300 Posts Drives: 2x Harrop E90 M3, E92 M3, E39 Join Date: Apr 2008 Location: SoCal iTrader: (9) Garage List 2000 BMW M5 [0.00] 1990 BMW 735i Turbo [0.00] 2008 BMW M3 [7.50] 2015 BMW M3 [0.00] 2015 BMW M5 [0.00]	I don't recommend it.
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04-12-2017, 07:59 PM	#5
Redd Brigadier General 5039 Rep 4,842 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Been on Mike's burble tune for over a year now, no problems. No lambda issues, though my car is completely decatted. Haven't done a Blackstone, but I don't see how fuel can get into oil of your piston rings are healthy. That said, I had to beg Mike to sell it to me. Like he says, he doesn't recommend it. But I love the burbles!
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04-13-2017, 07:51 AM	#7
doogee Major 770 Rep 1,263 Posts Drives: '08 M3, '09 328xi Sport Wagon Join Date: Oct 2008 Location: Ancaster, ON, Canada iTrader: (0)	Sounds far too artificial and exaggerated in my opinion. __________________
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04-13-2017, 07:56 AM	#8
dparm Stop the hate, get a V8 3928 Rep 8,631 Posts Drives: C7 Corvette, Spec E46, G87 M2 Join Date: Jun 2013 Location: Frisco, TX iTrader: (1)	This whole backfire/burble/crackling thing is basically just unspent fuel detonating in the exhaust manifolds and cats, as I understand it. There's no way it's good for the cats or oxygen sensors. On a more subjective level, I find it annoying and it doesn't really match the character of the M3. __________________ Now: 2017 Corvette Grand Sport, 2001 BMW Spec E46 race car, 2025 BMW M2 Past: 2011.5 M3 sedan ZCP
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04-13-2017, 08:29 AM	#9
HomoPirate First Lieutenant 93 Rep 357 Posts Drives: Always BMW Join Date: Jun 2016 Location: San Diego iTrader: (3)	I find these burbles and pops during engine overrun fit newer turbo engine better than our v8. At least they came with factory lol __________________ Past: E82 135i Crimson Red \| MPE \| MHD Stage1+ \| Dinan Camber Plate \| LCI Blackline \| Bavsound stage 1 \| KW Coilover V2 \| Past: E93 M3 Vert Alpine White \| Remus Sport Exhaust \| Past: F82 Yas Marina Blue Civic M4\| MPE V2 \| DP \| BM3 \| Apex FL-5 \| MP Part(s) \| Current: F87 M2 Competition Long Beach Blue \| Completely Stock \|
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04-13-2017, 10:30 AM	#10
svinfinity First Lieutenant 66 Rep 383 Posts Drives: E92 JEREZ M3 Join Date: Mar 2015 Location: Fort lee nj iTrader: (0)	I've inquired about the this feature with a certain tune company and shop and they claim its perfectly safe.
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04-14-2017, 07:41 AM	#11
jcolley Lieutenant 381 Rep 413 Posts Drives: 328 Join Date: Jul 2007 Location: Maine iTrader: (1)	Low (relative) cylinder pressures at combustion, increased (also relative due to low cylinder pressure) blow by during compression stroke, additional fuel. Fuel goes right by the rings to some degree. I've seen several people with this option in their tune report similar UOA results with different tuning vendors. Of concern to me would be the nature of an Alusil cylinder bore's design and to retain an oil film for ring lubrication and the effects on ring/bore wear. A tuning company claiming "perfectly safe" and backing it up with data and warranty are different things. Props to Mike for his recommendation.
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