AR Design DP Question...***HELP***

Bpower · 01-03-2011, 07:32 PM

Ok, I looked and looked and cant get a definite answer on this for some reason.
Will catted AR downpipes give a check engine light on the 335i Sedan production year after 11/2007 with an upgraded BMW software release? ( I also have a Dinan flash if that matters). I really want that 20 extra WHP without doing a cel fix mod or running catless downpipes so that is not an option for me. Thanks in advance

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Forcefed3 · 01-03-2011, 07:35 PM

It is possible, but I dont hear about that too often. Go for it, and if there is a problem you can buy my DP fix. $60 shipped

Mike@N54Tuning.com · 01-03-2011, 08:23 PM

The chances increase with the newer BMW software so it's a toss up. I personally would assume you will get a CEL immediately or at some point after install. May take a few months.

Mike

Forcefed3 · 01-03-2011, 08:25 PM

Quote:

Originally Posted by Mike@N54Tuning.com

The chances increase with the newer BMW software so it's a toss up. I personally would assume you will get a CEL immediately or at some point after install. May take a few months.

Mike

+1, any change in emissions could trigger it.

sleepergm · 01-03-2011, 08:41 PM

I am pretty sure you will ... mine took a couple days after the install. I am on the newest version of BMW software - 076 I think.

Bpower · 01-03-2011, 09:16 PM

Quote:

Originally Posted by sleepergm

I am pretty sure you will ... mine took a couple days after the install. I am on the newest version of BMW software - 076 I think.

I was really hoping someone could say "you wont get a cel"...lol

Thank you guys for the info.

Zasquatch · 01-04-2011, 06:23 AM

So if catted DP's still give a CEL, what's the point of even shelling out the extra dough for them? From what I've been reading on numerous threads, you may as well just get cattless DPs?

enrita · 01-04-2011, 06:58 AM

exactly catted dps are a waste of money.

Zasquatch · 01-04-2011, 08:22 AM

Quote:

Originally Posted by enrita

exactly catted dps are a waste of money.

Interesting.... So are there any downsides to going with cattless DP's other than having to swap back to stock pipes for OBD-II Emissions Testing once every 2 years? I've got a PROcede, so I assume the CANclear or O2 sim will take care of the CEL.

Bpower · 01-04-2011, 09:34 AM

Quote:

Originally Posted by Annino

Interesting.... So are there any downsides to going with cattless DP's other than having to swap back to stock pipes for OBD-II Emissions Testing once every 2 years? I've got a PROcede, so I assume the CANclear or O2 sim will take care of the CEL.

Yes that is true but if you are like me and you have Dinan and you got Dinan solely to not have to swap anything out and you get catless downpipe with a cel fix then you just defeated a whole purpose spending extra 1500 on a flash that gives you a warranty!
I think It would be great if an aftermarket downpipe manufacturer created a good downpipe without a cel that was catted I would then buy it. IMO if you have a good R&D facility you can do some emission logs and see what causes the cel to pop and just alter the downpipe to the specs where it doesnt.

Zasquatch · 01-04-2011, 09:41 AM

Quote:

Originally Posted by Bpower

Yes that is true but if you are like me and you have Dinan and you got Dinan solely to not have to swap anything out and you get catless downpipe with a cel fix then you just defeated a whole purpose spending extra 1500 on a flash that gives you a warranty!
I think It would be great if an aftermarket downpipe manufacturer created a good downpipe without a cel that was catted I would then buy it. IMO if you have a good R&D facility you can do some emission logs and see what causes the cel to pop and just alter the downpipe to the specs where it doesnt.

Yeah I agree, I would like an easy DP solution that you can install and forget about. I am VERY curious about the cp-e DPs with spun-metallic cats. I havn't been able to find feedback from anyone on here though...

Bpower · 01-04-2011, 10:09 AM

Quote:

Originally Posted by Annino

Yeah I agree, I would like an easy DP solution that you can install and forget about. I am VERY curious about the cp-e DPs with spun-metallic cats. I havn't been able to find feedback from anyone on here though...

Looks like me and you are in search of the same answer. Keep me posted if you find anything out.

secretsquirrel · 01-04-2011, 10:50 AM

^^^ +2

Imperator · 01-04-2011, 12:04 PM

Quote:

Originally Posted by Annino

Yeah I agree, I would like an easy DP solution that you can install and forget about. I am VERY curious about the cp-e DPs with spun-metallic cats. I havn't been able to find feedback from anyone on here though...

The CP-E and AR are the best HFC downpipes available for the money. I'm not entirely sure about CP-E but I believe AR uses the Magnaflow 99000-series 300-cell center-spin cats, about the best they can use for the money and space constraints.

AR's downpipes also place the secondary O2 sensors in almost the exact same location as found in the stock catalytic downpipes. I've talked with Andrew about this briefly and we believe a new set shouldn't trip any catalyst efficiency codes, but I don't know of anyone who's using these on a tune for a significant number of miles. There are two guys who post here occasionally using AR HFC DPs on the GIAC S2 tune-- you might want to wait for them to chime in.

I'd feel more confident about running catless downpipes if I knew of some super-secret-stealth method of installing the BMS "DP fix" (I hate that term, they're O2 simulators) so that nobody would notice your modification at the dealership.

I335 · 01-04-2011, 12:22 PM

I've been running the AR catted DPs for about 3 weeks or so with GIAC stage 2 and haven't seen a CEL yet - fingers crossed...

Bpower · 01-04-2011, 08:26 PM

Quote:

Originally Posted by I335

I've been running the AR catted DPs for about 3 weeks or so with GIAC stage 2 and haven't seen a CEL yet - fingers crossed...

Do you have the latest version of BMW software update?

Bpower · 02-11-2011, 07:24 PM

Quote:

Originally Posted by Bpower

Do you have the latest version of BMW software update?

Any update on this?

Bakeme521 · 02-11-2011, 07:49 PM

Why buy downpipes with cats? I feel like the gain can't be much, the power gains come from getting those kitties out of the way.

Bpower · 02-11-2011, 07:56 PM

Quote:

Originally Posted by Bakeme521

Why buy downpipes with cats? I feel like the gain can't be much, the power gains come from getting those kitties out of the way.

I went for Dinan flash because of trouble free and reliability, so taking kitties out and plug some simulators into my car will be a total opposite. I dont mind spending extra and getting something that works just like the factory intended just with extra gain in flow.

Imperator · 02-11-2011, 09:29 PM

Fking LOL @ domesticated feline as slang for a catalytic converter. The HPFP might as well become a puppy. I think I'm going to name the injectors after the Seven Dwarfs. One of them won't like being left out.

boom · 02-11-2011, 09:59 PM

I beta tested three different sets of cats for CPE and theyball threw cels. The last set, the ones they're selling now I believe, only threw a cel once in a long while and only after seriously beating on the car. Normal spirited driving had no cel.
The problem is the space requirements not allowing a big enough cat. You need a bigger length or cross sectional area to maintain flow and still clean the exhaust.

Brey335i · 02-11-2011, 10:16 PM

Newsflash: even catted downpipes will void your warranty. So why pay for Dinan if you're planning on doing this kind of modding?

01-03-2011, 07:32 PM	#1
Bpower Banned 25 Rep 431 Posts Drives: E-90 Join Date: Aug 2010 Location: Garage :) iTrader: (7)	AR Design DP Question...*HELP* Ok, I looked and looked and cant get a definite answer on this for some reason. Will catted AR downpipes give a check engine light on the 335i Sedan production year after 11/2007 with an upgraded BMW software release? ( I also have a Dinan flash if that matters). I really want that 20 extra WHP without doing a cel fix mod or running catless downpipes so that is not an option for me. Thanks in advance .
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01-03-2011, 07:35 PM	#2
Forcefed3 Banned 127 Rep 4,732 Posts Drives: 2008 335i Join Date: May 2010 Location: South iTrader: (2) Garage List 2008 335i [1.00]	It is possible, but I dont hear about that too often. Go for it, and if there is a problem you can buy my DP fix. $60 shipped
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01-03-2011, 08:23 PM	#3
Mike@N54Tuning.com Joint Chiefs of Staff 4927 Rep 116,037 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	The chances increase with the newer BMW software so it's a toss up. I personally would assume you will get a CEL immediately or at some point after install. May take a few months. Mike
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01-03-2011, 08:41 PM	#5
sleepergm Lieutenant 39 Rep 541 Posts Drives: White 335i M-Tech Join Date: May 2007 Location: Hong Kong iTrader: (2)	I am pretty sure you will ... mine took a couple days after the install. I am on the newest version of BMW software - 076 I think.
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01-04-2011, 06:23 AM	#7
Zasquatch Captain 36 Rep 708 Posts Drives: '07 BMW 335i Join Date: Sep 2010 Location: CT iTrader: (15) Garage List 2007 BMW 335i [0.00]	So if catted DP's still give a CEL, what's the point of even shelling out the extra dough for them? From what I've been reading on numerous threads, you may as well just get cattless DPs?
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01-04-2011, 06:58 AM	#8
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	exactly catted dps are a waste of money. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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01-04-2011, 10:50 AM	#13
secretsquirrel Colonel 130 Rep 2,291 Posts Drives: f80 Join Date: Dec 2010 Location: Far North Dallas iTrader: (2)	^^^ +2
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01-04-2011, 12:22 PM	#15
I335 Brigadier General 123 Rep 4,249 Posts Drives: '08 335i Coupe Join Date: Jan 2008 Location: New England iTrader: (11)	I've been running the AR catted DPs for about 3 weeks or so with GIAC stage 2 and haven't seen a CEL yet - fingers crossed...
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02-11-2011, 07:49 PM	#18
Bakeme521 Some say... 239 Rep 4,296 Posts Drives: Fresh Join Date: Mar 2010 Location: Baton Rouge n NOLA iTrader: (12) Garage List 2007 BMW 335i [8.24]	Why buy downpipes with cats? I feel like the gain can't be much, the power gains come from getting those kitties out of the way. __________________ I have exhaust and an intake...
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02-11-2011, 09:29 PM	#20
Imperator Major 54 Rep 1,175 Posts Drives: 2010 E92 335i Join Date: Mar 2010 Location: Plano, Texas iTrader: (8)	Fking LOL @ domesticated feline as slang for a catalytic converter. The HPFP might as well become a puppy. I think I'm going to name the injectors after the Seven Dwarfs. One of them won't like being left out.
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02-11-2011, 09:59 PM	#21
boom My X5d tows my spec miata to the track. 74 Rep 1,254 Posts Drives: 2010 X5 35d Join Date: Sep 2009 Location: USA iTrader: (0)	I beta tested three different sets of cats for CPE and theyball threw cels. The last set, the ones they're selling now I believe, only threw a cel once in a long while and only after seriously beating on the car. Normal spirited driving had no cel. The problem is the space requirements not allowing a big enough cat. You need a bigger length or cross sectional area to maintain flow and still clean the exhaust.
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02-11-2011, 10:16 PM	#22
Brey335i Banned 113 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	Newsflash: even catted downpipes will void your warranty. So why pay for Dinan if you're planning on doing this kind of modding?
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