What are the cons to getting a DP before a tune?

sA x sKy · 06-06-2011, 06:52 PM

As title states, are there any cons?

Elie335 · 06-06-2011, 07:01 PM

that's what you should do probably

FORCED AIR · 06-06-2011, 07:06 PM

you get better gains from the tune...the car may not run right on just a catless DP (catted may be fine though) w/o a tune...you will likely throw a check engine light if you go catless and no tune or DP 02 fix.

Syndicategt · 06-06-2011, 07:09 PM

You won't get the full potential of the DP's unless you are tuned. For best bang for the buck HP increase, tune and meth should be your first 2 mods.....DP's should be 3rd (unless you go FMIC for hot weather/auto x).

They will still give you a decent bump in HP and the sound will be much deeper, but 99.9% of people will tell you tune first.

CPWINCH · 06-06-2011, 07:37 PM

Quote:

Originally Posted by Syndicategt

You won't get the full potential of the DP's unless you are tuned. For best bang for the buck HP increase, tune and meth should be your first 2 mods.....DP's should be 3rd (unless you go FMIC for hot weather/auto x).

They will still give you a decent bump in HP and the sound will be much deeper, but 99.9% of people will tell you tune first.

what he said but i think dp before the meth because meth is hard on cats but not to bad

Brey335i · 06-06-2011, 08:04 PM

The only real con to it is the warning light on your dashboard

Tortfeasor 335xi · 06-06-2011, 08:08 PM

I second the "car might not run properly" view. Given turbos are spun by pressure differences before and after the turbine, and removing the cats and changing the diameter of the down pipe will change how the turbos respond, I would be very hesitant to run the car with a DP and no tune.

Better by far to buy the parts, keep them in the garage, and get them installed when you can get the car tuned properly.

Andrew@ET · 06-06-2011, 08:09 PM

Quote:

Originally Posted by Brey335i

The only real con to it is the warning light on your dashboard

E90SoFlo · 06-06-2011, 08:15 PM

Not really sure why you would want to, But as everyone has said, If you go catless you will need the O2 sensor fix.

sA x sKy · 06-06-2011, 08:24 PM

Well, the main reason I was asking is because I'm going more for sound rather than performance. I wont have the funds to upgrade my exhaust until August (saving up for the Akra stainless steel ver.). I thought buying the DP first will hold my hunger over for the sound I'm craving.

But I suppose it's not worth the hassle if the warning light is on without the tune. I'm one of those paranoid people who flinches at the sight of anything going wrong with something. Usually with things I have little to none experience on. In this case, BMW and modifying cars in general.

Would the general consensus be tune > exhaust > DP > FMIC > meth > everything else?

BerkTechnology · 06-06-2011, 08:26 PM

Quote:

Originally Posted by Brey335i

The only real con to it is the warning light on your dashboard

+2

BerkTechnology · 06-06-2011, 08:27 PM

Quote:

Originally Posted by sA x sKy

Well, the main reason I was asking is because I'm going more for sound rather than performance. I wont have the funds to upgrade my exhaust until August (saving up for the Akra stainless steel ver.). I thought buying the DP first will hold my hunger over for the sound I'm craving.

But I suppose it's not worth the hassle if the warning light is on without the tune. I'm one of those paranoid people who flinches at the sight of anything going wrong with sometime. Usually with things I have little to none experience on. In this case, BMW and cars and modifying cars in general.

Would the general consensus be tune > exhaust > DP > FMIC > meth > everything else?

And if you are one of the super sketchy types then I don't think meth would be a mod for you. Stick with the "passive" mods, intake, downpipe, exhaust, FMIC.

Brey335i · 06-06-2011, 09:01 PM

tune -> fmic -> downpipes -> meth -> exhaust or something like that. It depends on your personal needs. You can add parts like exhaust whenever you want as it really only adds sound

CPWINCH · 06-06-2011, 09:09 PM

Quote:

Originally Posted by sA x sKy

Would the general consensus be tune > exhaust > DP > FMIC > meth > everything else?

really depends, but i would go tune > DP > FMIC > exhaust if u want it loud. skip the meth if u dont like messing with stuff it requires some knowledge

jlcolon2001 · 06-06-2011, 09:16 PM

Quote:

Originally Posted by Brey335i

The only real con to it is the warning light on your dashboard

+3

TLO03 · 06-06-2011, 09:23 PM

Not sure how much dp's cost for the 335 but I'm pretty sure it's around the same as the tunes available w/ install. So you install dp's first all u have is a light on the dash and more noise.. Tune first, instant powah..

tibra1 · 06-06-2011, 09:39 PM

Quote:

Originally Posted by sA x sKy

As title states, are there any cons?

None actually pros..lower duty cycles on the turbos b/c the restriction of cats is gone which means they work less to reach the same boost..

u will throw O2 codes so u need a DP fix

tibra1 · 06-06-2011, 09:42 PM

Quote:

Originally Posted by Brey335i

The only real con to it is the warning light on your dashboard

+4

michaelalex17 · 06-06-2011, 09:50 PM

herpes

sA x sKy · 06-07-2011, 02:22 PM

Thanks everyone for the insightful responses. I decided to go the tune route and just purchased a N55 JB3 with the CAN tool from someone on the forums. Going to install it this weekend. Hopefully I don't run into any problems.

My next performance mod will be the exhaust, no doubt, in August. Then the DP's. I'll figure it out if I need more power from there.

Joe@TopGearSolutions · 06-07-2011, 02:36 PM

Its kinda like throwing it in with a condom. It works but there is better.

D335NUTZ · 06-07-2011, 07:07 PM

I wouldn't waste money on DPs without a tune.

06-06-2011, 06:52 PM	#1
sA x sKy Sameet 739 Rep 2,541 Posts Drives: AY/B M4 '15 Join Date: Apr 2010 Location: Long Island, New York iTrader: (3) Garage List 2015 BMW M4 [0.00]	What are the cons to getting a DP before a tune? As title states, are there any cons?
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06-06-2011, 07:01 PM	#2
Elie335 ايلي ٣٣٥ هاهاها 88 Rep 1,448 Posts Drives: Vorsteiner e92 Join Date: Jun 2009 Location: Leb iTrader: (1)	that's what you should do probably __________________ Recent exterior modifications
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06-06-2011, 07:06 PM	#3
FORCED AIR Got Boost? 7 Rep 234 Posts Drives: 2010 135i, Msport Join Date: May 2009 Location: The Desert iTrader: (1)	you get better gains from the tune...the car may not run right on just a catless DP (catted may be fine though) w/o a tune...you will likely throw a check engine light if you go catless and no tune or DP 02 fix. __________________ - - My Car Domain - - 2010 BMW 135i AT, AW, ///M Sport JB4\|BMS DCI\|MS 3" cattless DPs\|Golf Tee\|33% Tint\|///M Pedals
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06-06-2011, 07:09 PM	#4
Syndicategt Brigadier General 153 Rep 3,730 Posts Drives: 335i Join Date: Sep 2009 Location: Nor Cal iTrader: (11)	You won't get the full potential of the DP's unless you are tuned. For best bang for the buck HP increase, tune and meth should be your first 2 mods.....DP's should be 3rd (unless you go FMIC for hot weather/auto x). They will still give you a decent bump in HP and the sound will be much deeper, but 99.9% of people will tell you tune first. __________________ 2008 BMW 335i e90 - Sold - Rob Beck Turbos / PROcede V5 / Aquamist HFS-4 / AR Downpipes / AE Exhaust / ER Comp FMIC / ER CP / TiAL BOV / Custom Intake / RPI Scoops / Quaife LSD / Swift-Koni Coilovers / DSS HS / Morr VS8.2 Sig Black / Michelin PSS / P3 Boost Guage / M3 body / M3 steering wheel / Adam's Rotors / Hawk HPS / SS lines /
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06-06-2011, 08:04 PM	#6
Brey335i Banned 112 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	The only real con to it is the warning light on your dashboard
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06-06-2011, 08:08 PM	#7
Tortfeasor 335xi Corporate Hack 4 Rep 288 Posts Drives: '08 335xi Coupe Join Date: Mar 2008 Location: Princeton, NJ / Philly, PA iTrader: (0)	I second the "car might not run properly" view. Given turbos are spun by pressure differences before and after the turbine, and removing the cats and changing the diameter of the down pipe will change how the turbos respond, I would be very hesitant to run the car with a DP and no tune. Better by far to buy the parts, keep them in the garage, and get them installed when you can get the car tuned properly. __________________ New Car: 2008 335xi Coupe Earlier Car: 2004 STi (got stolen) Earlier Earlier Car: 1995 Mustang GT (416 whp and a blown engine) Really Much Earlier Car: 1988 Mazda 626 TURBO
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06-06-2011, 08:15 PM	#9
E90SoFlo Banned 196 Rep 2,669 Posts Drives: E90 335i Join Date: Jun 2011 Location: Naples, FL iTrader: (9)	Not really sure why you would want to, But as everyone has said, If you go catless you will need the O2 sensor fix.
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06-06-2011, 08:24 PM	#10
sA x sKy Sameet 739 Rep 2,541 Posts Drives: AY/B M4 '15 Join Date: Apr 2010 Location: Long Island, New York iTrader: (3) Garage List 2015 BMW M4 [0.00]	Well, the main reason I was asking is because I'm going more for sound rather than performance. I wont have the funds to upgrade my exhaust until August (saving up for the Akra stainless steel ver.). I thought buying the DP first will hold my hunger over for the sound I'm craving. But I suppose it's not worth the hassle if the warning light is on without the tune. I'm one of those paranoid people who flinches at the sight of anything going wrong with something. Usually with things I have little to none experience on. In this case, BMW and modifying cars in general. Would the general consensus be tune > exhaust > DP > FMIC > meth > everything else?
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06-06-2011, 09:01 PM	#13
Brey335i Banned 112 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	tune -> fmic -> downpipes -> meth -> exhaust or something like that. It depends on your personal needs. You can add parts like exhaust whenever you want as it really only adds sound
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06-06-2011, 09:23 PM	#16
TLO03 First Lieutenant 16 Rep 350 Posts Drives: E Join Date: Jun 2010 Location: No where iTrader: (0)	Not sure how much dp's cost for the 335 but I'm pretty sure it's around the same as the tunes available w/ install. So you install dp's first all u have is a light on the dash and more noise.. Tune first, instant powah..
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06-06-2011, 09:50 PM	#19
michaelalex17 Brigadier General 596 Rep 3,386 Posts Drives: Manual Wagon Join Date: Aug 2010 Location: CT iTrader: (4)	herpes
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06-07-2011, 02:22 PM	#20
sA x sKy Sameet 739 Rep 2,541 Posts Drives: AY/B M4 '15 Join Date: Apr 2010 Location: Long Island, New York iTrader: (3) Garage List 2015 BMW M4 [0.00]	Thanks everyone for the insightful responses. I decided to go the tune route and just purchased a N55 JB3 with the CAN tool from someone on the forums. Going to install it this weekend. Hopefully I don't run into any problems. My next performance mod will be the exhaust, no doubt, in August. Then the DP's. I'll figure it out if I need more power from there. Last edited by sA x sKy; 06-07-2011 at 02:44 PM..
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06-07-2011, 02:36 PM	#21
Joe@TopGearSolutions Major 263 Rep 1,173 Posts Drives: BMW Join Date: Mar 2011 Location: USA iTrader: (3)	Its kinda like throwing it in with a condom. It works but there is better.
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06-07-2011, 07:07 PM	#22
D335NUTZ The Blue Beast 142 Rep 5,665 Posts Drives: 2008 E92 335xi in Montego Blue Join Date: Jan 2011 Location: Queens, New York iTrader: (8)	I wouldn't waste money on DPs without a tune. __________________ Cobb AP Stage 2+ \| BMS DCI \| UR Catless DP \| UR Chargepipe \| Tial BV 50mm \| BSH OCC \| ETS FMIC \| Eisenmann Race Exhaust \| KWv1 Coilovers \| Volk TE37 TC Kline Ed.
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