Meth or downpipes?

Uzi_335xi · 12-26-2013, 12:48 PM

I have a e92 335xi 6MT, mods currently are jb4, injen dci, southbend stage 2 clutch & 7" vrsf FMIC. looking for some more pull, so what to do next?

whats everyones take of meth or downpipes.

Meth = easy install, downpipes = tough install.

What will give me better power gains?

AtlantaDude · 12-26-2013, 12:53 PM

Catless DPs then Meth. You're going to burn the Cats and not get the same power you would with meth if you didn't have the cats.

So, DPs ->Meth

135Pats · 12-26-2013, 12:54 PM

meth = easy install? No.

I mean it's not technically that tough, but it can be time consuming which is all that matters from a labor cost standpoint.

A good indy can swap downpipes faster than they can install a good trunk mount meth setup. I had my downpipes swapped out in 90 minutes tops, it's not a big deal for a tech who has done it before.

I'd start with downpipes and go from there. You'll get nice power gains, your turbos will thank you, and it sets the stage for further power down the line. You'll start to get nasty backpressure and EGT with the stock catted downpipes, even with meth helping to cool combustion.

jayzF30 · 12-26-2013, 01:38 PM

I would recommend breathing modifications first.

iturbo_bmw · 12-26-2013, 02:10 PM

like every1 said, i would go with downpipes first.

I just got mine last installed the other day and am very happy with the results. I've noticed more power, boost comes on so much faster (faster spool up), increased throttle response, and overall the turbos just breathe better. the only bad thing is my wastegates rattle so much more now, its pretty embarrassing

chepy24 · 12-26-2013, 03:39 PM

Quote:

Originally Posted by e92_bmw

like every1 said, i would go with downpipes first.

I just got mine last installed the other day and am very happy with the results. I've noticed more power, boost comes on so much faster (faster spool up), increased throttle response, and overall the turbos just breathe better. the only bad thing is my wastegates rattle so much more now, its pretty embarrassing

Damn that wastegate rattle!!

diegopiedra · 12-26-2013, 04:18 PM

Catless downpipes!

Jeff@TopGearSolutions · 12-26-2013, 04:49 PM

Meth could potentially be more power and it could be an easy install if you've done it many times before.

Although I still recommend downpipes or an intercooler first.

Methanol is not for amateurs and one should realize it is a band aid at the end of the day. It should really be only used for cooling of intake temps and not necessarily used for maximum performance.

135Pats · 12-26-2013, 04:57 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Meth could potentially be more power and it could be an easy install if you've done it many times before.

Although I still recommend downpipes or an intercooler first.

Methanol is not for amateurs and one should realize it is a band aid at the end of the day. It should really be only used for cooling of intake temps and not necessarily used for maximum performance.

I think it's important people really focus on the second part of your post. If you really wanted to you could squeeze some pretty heroic bottom line numbers out of a meth+tune only setup.

It would also be unsafe. Don't use meth as fuel kids.

csu87 · 12-26-2013, 11:18 PM

DPs for sure.

Like mentioned, unless you are experienced with Meth and know the tell tale signs of meth failures and/or have solid failsafes in place, you should not tune for meth. I have no issue with using it as a cooling aid, but tuning for the most power possible with meth is just a ticking time bomb. something as small as a plugged nozzle or a hose popping off, could ruin your engine.

HP Autosport · 12-26-2013, 11:34 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Meth could potentially be more power and it could be an easy install if you've done it many times before.

Although I still recommend downpipes or an intercooler first.

Methanol is not for amateurs and one should realize it is a band aid at the end of the day. It should really be only used for cooling of intake temps and not necessarily used for maximum performance.

Quote:

Originally Posted by 135Pats

I think it's important people really focus on the second part of your post. If you really wanted to you could squeeze some pretty heroic bottom line numbers out of a meth+tune only setup.

It would also be unsafe. Don't use meth as fuel kids.

+1 & 2. If you need advice talk to my piston #6 sitting on my desk, haha. Just do full bolt ons and a stage 2 tune for regular driving and if you want to have some fun throw in some 100 oct and run more advanced timing.

So go with DPs!!!

-Mike

E92TTKING · 12-27-2013, 12:31 AM

both /thread
infact pm me I have a meth kit if you are interested

HeavyMetalRocker · 12-27-2013, 01:11 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Meth could potentially be more power and it could be an easy install if you've done it many times before.

Although I still recommend downpipes or an intercooler first.

Methanol is not for amateurs and one should realize it is a band aid at the end of the day. It should really be only used for cooling of intake temps and not necessarily used for maximum performance.

+1

Downpipes aren't any harder than a meth kit! It's all about tools and experience wrenching on cars! DP's +1,000,000

Hierlevelz · 12-27-2013, 07:25 PM

All,

When running catless is the exhaust fumes not overwhelming particularly when sitting in stop and go traffic? And is the autoclear the only option when it comes to keeping CEl off and can it be programmed into back end flash.at least that's the way I had it done on my EVoX when I did my protune.

12-26-2013, 12:48 PM	#1
Uzi_335xi Enlisted Member 3 Rep 37 Posts Drives: 2014 Ford Mustang GT Join Date: Jun 2013 Location: Cambridge, ON iTrader: (0)	Meth or downpipes? I have a e92 335xi 6MT, mods currently are jb4, injen dci, southbend stage 2 clutch & 7" vrsf FMIC. looking for some more pull, so what to do next? whats everyones take of meth or downpipes. Meth = easy install, downpipes = tough install. What will give me better power gains? __________________ 08 335XI- Mods~ JB4 G5, Injen Intakes, VRSF 7" FMIC, Southbend stage 2 clutch (first XI clutch made by southbend), Eibach pro-kit "It's now okay to own a BMW, it appears all of the Douchebags have moved over to Audi's"
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12-26-2013, 12:53 PM	#2
AtlantaDude Just enjoying my time 127 Rep 855 Posts Drives: 2007 BMW E92 335i - Sold Join Date: Mar 2012 Location: Atlanta iTrader: (0)	Catless DPs then Meth. You're going to burn the Cats and not get the same power you would with meth if you didn't have the cats. So, DPs ->Meth __________________ Current - 2022 Rivian R1T, 2021 Ducati Streetfighter V4S, 1969 Chevy C10 Sold - 2018 Tesla Model 3 Performance Sold - 2007 E92 335i If speed is death, then buy a Honda and live forever
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12-26-2013, 12:54 PM	#3
135Pats Major General 461 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	meth = easy install? No. I mean it's not technically that tough, but it can be time consuming which is all that matters from a labor cost standpoint. A good indy can swap downpipes faster than they can install a good trunk mount meth setup. I had my downpipes swapped out in 90 minutes tops, it's not a big deal for a tech who has done it before. I'd start with downpipes and go from there. You'll get nice power gains, your turbos will thank you, and it sets the stage for further power down the line. You'll start to get nasty backpressure and EGT with the stock catted downpipes, even with meth helping to cool combustion. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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12-26-2013, 01:38 PM	#4
jayzF30 Captain 36 Rep 783 Posts Drives: '07 335i, '09 M3 Join Date: Mar 2012 Location: Thornhill iTrader: (0)	I would recommend breathing modifications first. __________________ '07 335i E90 - PTF ProTUNED by Dzenno - COBB FMIC - AFE DCI - AA DPs - HFS4 Meth '09 M3 - Stock
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12-26-2013, 02:10 PM	#5
iturbo_bmw Major 96 Rep 1,101 Posts Drives: 335i, 530i Join Date: Oct 2012 Location: San Jose iTrader: (0)	like every1 said, i would go with downpipes first. I just got mine last installed the other day and am very happy with the results. I've noticed more power, boost comes on so much faster (faster spool up), increased throttle response, and overall the turbos just breathe better. the only bad thing is my wastegates rattle so much more now, its pretty embarrassing
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12-26-2013, 04:18 PM	#7
diegopiedra Lieutenant 44 Rep 450 Posts Drives: 335i Join Date: Oct 2013 Location: South Florida iTrader: (1)	Catless downpipes! __________________ Fbo stage 3 mmp turbos 100% e85 335i n54 e92
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12-26-2013, 04:49 PM	#8
Jeff@TopGearSolutions 3482 Rep 79,210 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Meth could potentially be more power and it could be an easy install if you've done it many times before. Although I still recommend downpipes or an intercooler first. Methanol is not for amateurs and one should realize it is a band aid at the end of the day. It should really be only used for cooling of intake temps and not necessarily used for maximum performance.
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12-26-2013, 11:18 PM	#10
csu87 Banned 2132 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	DPs for sure. Like mentioned, unless you are experienced with Meth and know the tell tale signs of meth failures and/or have solid failsafes in place, you should not tune for meth. I have no issue with using it as a cooling aid, but tuning for the most power possible with meth is just a ticking time bomb. something as small as a plugged nozzle or a hose popping off, could ruin your engine.
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12-27-2013, 12:31 AM	#12
E92TTKING Colonel 269 Rep 2,263 Posts Drives: e92 Join Date: Oct 2009 Location: Merica iTrader: (10)	both /thread infact pm me I have a meth kit if you are interested
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12-27-2013, 07:25 PM	#14
Hierlevelz Captain 80 Rep 934 Posts Drives: 11 AW E9X M Join Date: Dec 2011 Location: Hudson Valley iTrader: (10)	All, When running catless is the exhaust fumes not overwhelming particularly when sitting in stop and go traffic? And is the autoclear the only option when it comes to keeping CEl off and can it be programmed into back end flash.at least that's the way I had it done on my EVoX when I did my protune.
	Appreciate 0 Quote