Cated or Catless DPs

elm3 · 01-29-2018, 08:17 AM

Hi Guys and Gals,

Anybody that is running DPs, which ones do you prefer, cated or catless? Also, do you have any fumes or smells inside the cabine? I'm about to install the Dinantronics, if I want to intall DPs later on, is there a way of turning the CEL off? I know that the Dinantronics will not do that, but is there a stand alone part that I can use to do this in conjuction with the Dinan.

Thank you.

Eric

onfireX5 · 01-29-2018, 08:44 AM

IMHO, down pipes are a sound mod. I’ve not tested BMW, but have tested 650hp GM engines and removing stock cats gained less than 10rwhp. Ride will sound better and the turbo sound is more pronounced and will make you think it is much faster. Go for it if you like the sound first and a few ponies. You will smell fumes outside and possibly inside at drive throughs.

Flash tune is the only dependable way to eliminate the cel.

elm3 · 01-29-2018, 08:46 AM

Quote:

Originally Posted by onfireX5

IMHO, down pipes are a sound mod. I’ve not tested BMW, but have tested 650hp GM engines and removing stock cats gained less than 10rwhp. Ride will sound better and the turbo sound is more pronounced and will make you think it is much faster. Go for it if you like the sound first and a few ponies. You will smell fumes outside and possibly inside at drive throughs.

Flash tune is the only dependable way to eliminate the cel.

That is what I thought too. Thank you so much for you response.

Grayblack · 01-29-2018, 09:21 AM

There will likely be fumes with catless, but you'll get more gains. The CEL can be tuned out by a tuner.

supersanj · 01-30-2018, 10:14 PM

I've heard on M5/6 and one other X5M that had catted DPs and still threw a CEL down the road. I'm planning on eventually going catless for this reason, fumes will be marginal but definitely will be there.

In terms of power, you'll gain a little with just the DP but this has to be in conjunction with a real tune (not dinantronics) to take full advantage.

VGM6 · 01-31-2018, 12:19 AM

I have catless down pipes with my akrapovic exhaust. Going catless you will definitely get a CEL with out a tune to delete it. The sound with a catless is a very loud in sport or sport plus but in efficient you can keep the exhaust very tame when driving conservatively. In regards to the fumes, in efficient you can hardly smell anything from the inside with windows down. In sport and sport plus it is noticeable but is actually not that bad and doesn’t bother me compared to my catless v10 M6. I haven’t dynoed it yet as I’m waiting to do it around the same temperature as my previous dyno to have a better comparison in June but the power did feel noticeably stronger.

RaVe · 02-01-2018, 06:20 AM

I am using 400cel DPs. No delete necessery. Better Turbo Sound with my akra and not so loud that isnt it possible for daily driving.

Next step i will do an OBD Tune to 700 hp and thats it.
Someone told me that it could be possible with 750 hp but i dont want to overtune and have later problems with maybe the engine.

elm3 · 02-01-2018, 07:46 AM

Quote:

Originally Posted by RaVe

I am using 400cel DPs. No delete necessery. Better Turbo Sound with my akra and not so loud that isnt it possible for daily driving.

Next step i will do an OBD Tune to 700 hp and thats it.
Someone told me that it could be possible with 750 hp but i dont want to overtune and have later problems with maybe the engine.

Thank you for the response. What is the brand for the 400cel DPs that you have and where can I get them? I'm in the US.

Thank you.
Eric

supersanj · 02-01-2018, 02:35 PM

Quote:

Originally Posted by VGM6

I have catless down pipes with my akrapovic exhaust. Going catless you will definitely get a CEL with out a tune to delete it. The sound with a catless is a very loud in sport or sport plus but in efficient you can keep the exhaust very tame when driving conservatively. In regards to the fumes, in efficient you can hardly smell anything from the inside with windows down. In sport and sport plus it is noticeable but is actually not that bad and doesn’t bother me compared to my catless v10 M6. I haven’t dynoed it yet as I’m waiting to do it around the same temperature as my previous dyno to have a better comparison in June but the power did feel noticeably stronger.

do you have any vids with the akra and catless? been wondering how it will sound with the two in unison.

peloterogq · 02-01-2018, 03:50 PM

What You Can Do Get Catless Downpipe And Replace The Resonator For 200 Cell Cat No Smell, Good Sound

peloterogq · 02-01-2018, 03:56 PM

THIS IS YOUR SET UP CHECK THE LINK GOOD LUCK

RaVe · 02-04-2018, 05:07 AM

Quote:

Originally Posted by elm3

Thank you for the response. What is the brand for the 400cel DPs that you have and where can I get them? I'm in the US.

Thank you.
Eric

I bought the DPs here:
http://nolimit-power.com/bmw-x5m-f85...s-423kw-750nm/

scotty91ss · 02-04-2018, 11:20 AM

I have catless DP and exhaust from FI Exhausts. Really enjoy the sound of the turbo, especially under light acceleration. Exhaust has remote control to be open or closed at your decision. I only smell it at start up or under ground parking. I think of it like steak. Do you actually enjoy the smell of steak? If not, do you stop eating it. Performance and sound fully outweigh any drawback for me. And I have never removed DPs before on any other vehicle. Had to get a tuner to take out the CEL. Actually if I were to do it again, my mechanic said it is so easy to change the Turbos at the same time. Should have done that and buy 1 tune instead of 2.

01-29-2018, 08:17 AM	#1
elm3 ///M Fan 366 Rep 2,159 Posts Drives: '09 E92 M3 IB/'17 f85 X5M LBB Join Date: Sep 2008 Location: Canton, GA. iTrader: (1) Garage List 2017 BMW / X5M [9.00] 2009 E92 M3 [10.00] 2004 Yamaha R1 [10.00]	Cated or Catless DPs Hi Guys and Gals, Anybody that is running DPs, which ones do you prefer, cated or catless? Also, do you have any fumes or smells inside the cabine? I'm about to install the Dinantronics, if I want to intall DPs later on, is there a way of turning the CEL off? I know that the Dinantronics will not do that, but is there a stand alone part that I can use to do this in conjuction with the Dinan. Thank you. Eric __________________ '09 E92 ///M3 Interlagos Blue,6MT,Silver Novillo Leather,CF Trim,Premium Package,Technology Package,Cold Weather Package,Premium Sound,19"Wheels,Moonroof-Toy/'17 X5M, Long Beach Blue, Executive Package,Technology Package, Lighting Package, Driver Assist, Full Mughello Red Interior, 21" wheels-Toy/'14 535i with M Sport and 19" wheels-Daily
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01-29-2018, 08:44 AM	#2
onfireX5 Brigadier General 3619 Rep 4,532 Posts Drives: F90M5,F85X5M Join Date: Jul 2015 Location: Va iTrader: (0)	IMHO, down pipes are a sound mod. I’ve not tested BMW, but have tested 650hp GM engines and removing stock cats gained less than 10rwhp. Ride will sound better and the turbo sound is more pronounced and will make you think it is much faster. Go for it if you like the sound first and a few ponies. You will smell fumes outside and possibly inside at drive throughs. Flash tune is the only dependable way to eliminate the cel.
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01-29-2018, 09:21 AM	#4
Grayblack Captain 183 Rep 995 Posts Drives: E92 M3 and G07 X7 Join Date: Nov 2012 Location: OC, CA iTrader: (8)	There will likely be fumes with catless, but you'll get more gains. The CEL can be tuned out by a tuner.
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01-30-2018, 10:14 PM	#5
supersanj Private First Class 124 Rep 133 Posts Drives: e92 328xi Join Date: Jun 2011 Location: DC iTrader: (0)	I've heard on M5/6 and one other X5M that had catted DPs and still threw a CEL down the road. I'm planning on eventually going catless for this reason, fumes will be marginal but definitely will be there. In terms of power, you'll gain a little with just the DP but this has to be in conjunction with a real tune (not dinantronics) to take full advantage.
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01-31-2018, 12:19 AM	#6
VGM6 Private First Class 34 Rep 144 Posts Drives: F86 X6M & E63 M6 Join Date: Mar 2012 Location: Toronto, ON/Los Angeles, CA iTrader: (0)	I have catless down pipes with my akrapovic exhaust. Going catless you will definitely get a CEL with out a tune to delete it. The sound with a catless is a very loud in sport or sport plus but in efficient you can keep the exhaust very tame when driving conservatively. In regards to the fumes, in efficient you can hardly smell anything from the inside with windows down. In sport and sport plus it is noticeable but is actually not that bad and doesn’t bother me compared to my catless v10 M6. I haven’t dynoed it yet as I’m waiting to do it around the same temperature as my previous dyno to have a better comparison in June but the power did feel noticeably stronger.
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		BMW X5 and X6 Forum (F15/F16) > BMW X5 (F15) and BMW X6 (F16) Forum > BMW X5M (F85) and X6M (F86) Forum
Cated or Catless DPs

02-01-2018, 06:20 AM	#7
RaVe Private 80 Rep 96 Posts Drives: X5M F85 Join Date: Jan 2016 Location: West Germany iTrader: (0)	I am using 400cel DPs. No delete necessery. Better Turbo Sound with my akra and not so loud that isnt it possible for daily driving. Next step i will do an OBD Tune to 700 hp and thats it. Someone told me that it could be possible with 750 hp but i dont want to overtune and have later problems with maybe the engine.
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02-01-2018, 03:50 PM	#10
peloterogq Private 3 Rep 53 Posts Drives: bmw x5 50i Join Date: Feb 2015 Location: new york iTrader: (0)	What You Can Do Get Catless Downpipe And Replace The Resonator For 200 Cell Cat No Smell, Good Sound
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02-01-2018, 03:56 PM	#11
peloterogq Private 3 Rep 53 Posts Drives: bmw x5 50i Join Date: Feb 2015 Location: new york iTrader: (0)	THIS IS YOUR SET UP CHECK THE LINK GOOD LUCK
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02-04-2018, 11:20 AM	#13
scotty91ss First Lieutenant 182 Rep 321 Posts Drives: 19 M5, '15 X5M,'91Chev454ss Join Date: Nov 2015 Location: Edmonton iTrader: (0)	I have catless DP and exhaust from FI Exhausts. Really enjoy the sound of the turbo, especially under light acceleration. Exhaust has remote control to be open or closed at your decision. I only smell it at start up or under ground parking. I think of it like steak. Do you actually enjoy the smell of steak? If not, do you stop eating it. Performance and sound fully outweigh any drawback for me. And I have never removed DPs before on any other vehicle. Had to get a tuner to take out the CEL. Actually if I were to do it again, my mechanic said it is so easy to change the Turbos at the same time. Should have done that and buy 1 tune instead of 2.
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