Question On Downpipe & Catted Connecting Pipe

hl0m4n · 01-11-2009, 05:21 PM

if i upgrade to ss downpipes (catless) and buy the ss catted connecting pipes, do the 02 sensors relocated to the catted pipes so i can still pass emissions?

right now im thinking it's like the m3 csl setup where they moved the cats off the headers to the pipes for better flow.

just wanted to confirm.

scalbert · 01-11-2009, 06:21 PM

No, if catless DP's are used, you still need sims regardless of what happens from that point back.

hl0m4n · 01-11-2009, 09:12 PM

Quote:

Originally Posted by scalbert

No, if catless DP's are used, you still need sims regardless of what happens from that point back.

even if the 02 sensors in the downpipe are reading from after the cats of the connecting?

Andrew@ET · 01-11-2009, 09:26 PM

the o2 sensors are reading from before the added cats..

you will need sims.

nj335i · 01-12-2009, 09:48 AM

I think he's asking if the O2 sensors were relocated... probably lengthened so that they can read the levels after the "connecting pipes". I'm guessing that it should work if you get the right guy to install it and if the new cats are high quality, which they should be.

scalbert · 01-12-2009, 09:56 AM

Quote:

Originally Posted by nj335i

I think he's asking if the O2 sensors were relocated... probably lengthened so that they can read the levels after the "connecting pipes". I'm guessing that it should work if you get the right guy to install it and if the new cats are high quality, which they should be.

In that case, yes, it should work. A quick note though, there is not much room for the sensors though if you move them back. They will have to angle the bungs.

enrita · 01-12-2009, 10:02 AM

I can confirm the relocation of the 02 Sensors in the midpipe with longer cable. I called Supersprint about the complete system and asked them this exact question.

hl0m4n · 01-12-2009, 01:06 PM

Quote:

Originally Posted by enrita

I can confirm the relocation of the 02 Sensors in the midpipe with longer cable. I called Supersprint about the complete system and asked them this exact question.

yea guys that is what i meant to say. the 02 sensors are located on the downpipe after the cats. so if i were to redirect them to the rear on the connecting pipe (where the ss cat is located) it will get a reading from there so i shouldn't have any warnings and be able to pass emissions.

hl0m4n · 01-12-2009, 01:14 PM

also how hard is it to lengthen the 02 sensors?

scalbert · 01-12-2009, 01:21 PM

Quote:

Originally Posted by hl0m4n

also how hard is it to lengthen the 02 sensors?

Cut the wire (four wires in total), add in a length, solder it up and put a protective sleeve on it.

Gen_E92 · 01-12-2009, 02:38 PM

I think someone have tried it and doesn't work...can't remember who though

nj335i · 01-12-2009, 03:48 PM

Quote:

Originally Posted by scalbert

Cut the wire (four wires in total), add in a length, solder it up and put a protective sleeve on it.

Probably only need to relocate 2 of them, right? The post-cat sensors.

scalbert · 01-12-2009, 06:00 PM

Quote:

Originally Posted by nj335i

Probably only need to relocate 2 of them, right? The post-cat sensors.

Yes, but there are four conductors per sensor.

01-11-2009, 05:21 PM	#1
hl0m4n Major General 2158 Rep 5,623 Posts Drives: BMW Join Date: Nov 2006 Location: NY iTrader: (58)	Question On Downpipe & Catted Connecting Pipe if i upgrade to ss downpipes (catless) and buy the ss catted connecting pipes, do the 02 sensors relocated to the catted pipes so i can still pass emissions? right now im thinking it's like the m3 csl setup where they moved the cats off the headers to the pipes for better flow. just wanted to confirm. __________________ Cars: 07 335i ► 08 328i ► 11 328xi ► 13 M3 ► 17 M4 ► 14 M6
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01-11-2009, 06:21 PM	#2
scalbert Major General 153 Rep 5,780 Posts Drives: '13 S4, '15 Q7 Join Date: Feb 2007 Location: Woodstock, GA iTrader: (8)	No, if catless DP's are used, you still need sims regardless of what happens from that point back.
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01-11-2009, 09:26 PM	#4
Andrew@ET Brigadier General 181 Rep 4,038 Posts Drives: Red thing Join Date: May 2007 Location: Earth iTrader: (9)	the o2 sensors are reading from before the added cats.. you will need sims.
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01-12-2009, 09:48 AM	#5
nj335i Modaholic 88 Rep 1,705 Posts Drives: with 3 pedals Join Date: Jan 2007 Location: East Coast iTrader: (7)	I think he's asking if the O2 sensors were relocated... probably lengthened so that they can read the levels after the "connecting pipes". I'm guessing that it should work if you get the right guy to install it and if the new cats are high quality, which they should be. __________________ Euro Delivery - April 2007
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01-12-2009, 10:02 AM	#7
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	I can confirm the relocation of the 02 Sensors in the midpipe with longer cable. I called Supersprint about the complete system and asked them this exact question. __________________ 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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01-12-2009, 01:14 PM	#9
hl0m4n Major General 2158 Rep 5,623 Posts Drives: BMW Join Date: Nov 2006 Location: NY iTrader: (58)	also how hard is it to lengthen the 02 sensors? __________________ Cars: 07 335i ► 08 328i ► 11 328xi ► 13 M3 ► 17 M4 ► 14 M6
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01-12-2009, 02:38 PM	#11
Gen_E92 Brigadier General 118 Rep 3,432 Posts Drives: slow Join Date: Oct 2006 Location: Vancouver iTrader: (17) Garage List 2007 335i [7.80]	I think someone have tried it and doesn't work...can't remember who though
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