huge backfires with meth?

GotBoost? · 11-17-2010, 04:55 PM

so my brother in law drove my car today and got into some runs with a really nice sti and i was driving his car and watching from behind.

everytime he would let off / upshift a burst of fire would come out of the driver side muffler is this normal with meth?

i'm running the coolingmist system with dual nozzle injection,

any info would be greatly appeciated,

(we won btw...lol)

Constant.S · 11-17-2010, 05:03 PM

If you run catless DP's/Exahust setup with high octane fuel, then i'd say its perfectly normal. My opinion.

themyst · 11-17-2010, 05:08 PM

backfire all the time on a hard shift in my 6MT 135i + meth. Heck, I get it sometimes without meth.

Jeff@TopGearSolutions · 11-17-2010, 05:26 PM

HEHE Backfire is awesome, I only get it out of first gear though.... I have stock exhaust though.

forza1976 · 11-17-2010, 05:31 PM

Quote:

Originally Posted by themyst

backfire all the time on a hard shift in my 6MT 135i + meth. Heck, I get it sometimes without meth.

+1 with catless dp's and secondary cats I'd get some nice noise between shifts and I have never had meth. I loved that sound

N55 Power · 11-17-2010, 05:47 PM

why cant you just dump meth in your tank? wont it go the same place and do the same stuff?

Will the alcohol corrode stuff?

atlharry · 11-17-2010, 06:15 PM

Quote:

Originally Posted by N55 Power

why cant you just dump meth in your tank? wont it go the same place and do the same stuff?

Will the alcohol corrode stuff?

Benefits of meth are primarily in it's ability to lower intake temps via evaporation. Dumping it in your tank won't allow that to happen. It's not an octane booster...

Constant.S · 11-17-2010, 06:24 PM

Quote:

Originally Posted by atlharry

Benefits of meth are primarily in it's ability to lower intake temps via evaporation. Dumping it in your tank won't allow that to happen. It's not an octane booster...

That.

N55 Power · 11-17-2010, 07:25 PM

ok but will you still get flames?

lol

GarageKeptE92 · 11-17-2010, 07:56 PM

Yea flames in your engine known as misfires.

Former_Boosted_IS · 11-18-2010, 06:15 AM

That sounds like a very slow reacting check valve. You backfire if you system is not shutting down fast enough during shifts.

GotBoost? · 11-18-2010, 02:35 PM

Quote:

Originally Posted by Former_Boosted_IS

That sounds like a very slow reacting check valve. You backfire if you system is not shutting down fast enough during shifts.

is it safe?

11-17-2010, 04:55 PM	#1
GotBoost? Banned 22 Rep 314 Posts Drives: fast Join Date: Oct 2010 Location: East Coast iTrader: (3)	huge backfires with meth? so my brother in law drove my car today and got into some runs with a really nice sti and i was driving his car and watching from behind. everytime he would let off / upshift a burst of fire would come out of the driver side muffler is this normal with meth? i'm running the coolingmist system with dual nozzle injection, any info would be greatly appeciated, (we won btw...lol)
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11-17-2010, 05:03 PM	#2
Constant.S Resistance is futile... 58 Rep 640 Posts Drives: BMW Z4 E89(N54) Join Date: Nov 2010 Location: Greece/Canada iTrader: (0)	If you run catless DP's/Exahust setup with high octane fuel, then i'd say its perfectly normal. My opinion. __________________ An ounce of performance is worth pounds of promises.
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11-17-2010, 05:08 PM	#3
themyst Major General 189 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	backfire all the time on a hard shift in my 6MT 135i + meth. Heck, I get it sometimes without meth. __________________ E90 LCI N54 6AT
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11-17-2010, 05:26 PM	#4
Jeff@TopGearSolutions 3474 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	HEHE Backfire is awesome, I only get it out of first gear though.... I have stock exhaust though.
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11-17-2010, 05:47 PM	#6
N55 Power Private First Class 13 Rep 146 Posts Drives: 2011 135i Join Date: Feb 2010 Location: среќен град iTrader: (0)	why cant you just dump meth in your tank? wont it go the same place and do the same stuff? Will the alcohol corrode stuff?
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11-17-2010, 07:25 PM	#9
N55 Power Private First Class 13 Rep 146 Posts Drives: 2011 135i Join Date: Feb 2010 Location: среќен град iTrader: (0)	ok but will you still get flames? lol
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11-17-2010, 07:56 PM	#10
GarageKeptE92 Banned 3 Rep 60 Posts Drives: 335i Join Date: Nov 2010 Location: NY iTrader: (0)	Yea flames in your engine known as misfires.
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11-18-2010, 06:15 AM	#11
Former_Boosted_IS Major General 315 Rep 5,175 Posts Drives: 4 Wheels Join Date: Aug 2007 Location: Planet Earth! iTrader: (15)	That sounds like a very slow reacting check valve. You backfire if you system is not shutting down fast enough during shifts.
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