Quick CEL question/headers

mousitch · 10-30-2013, 07:17 PM

Euro headers and DKF section 1. If i choose to not bypass my O2 sensors to my cats will performance be hampered? The CEL doesnt bother me as long as it doesnt affect performance or cause other issues.

inTgr8r · 10-30-2013, 08:51 PM

I have been running mine that way for the last month including track time.
Seems to run just fine.

i2ichal2dZ4M · 10-30-2013, 09:37 PM

how much is a tune normally? need to figure in the cost to turne, then detune for smog purpose and retune and see if itll be worth it.

mousitch · 10-30-2013, 09:58 PM

Just think Im going to slap on headers and tie up o2's for awhile. Run DKF with resonators. I can clear the codes myself if I ever need to. Looks to me rerouting o2's will be a bitch.

kcdedric · 10-30-2013, 11:03 PM

Quote:

Originally Posted by mousitch

Looks to me rerouting o2's will be a bitch.

It's not too bad. I just did mine a couple days ago and it took about 5 hours all in including uninstalling/reinstalling my section 1, the x-pipe, and aligning mufflers.

ZeD4Mr · 10-31-2013, 12:29 AM

Quote:

Originally Posted by mousitch

Just think Im going to slap on headers and tie up o2's for awhile. Run DKF with resonators. I can clear the codes myself if I ever need to. Looks to me rerouting o2's will be a bitch.

woo woo, so no cats? How do you code out O2/CEL without a tune?

nekky · 10-31-2013, 10:33 AM

Quote:

Originally Posted by ZeD4Mr

woo woo, so no cats? How do you code out O2/CEL without a tune?

I think what he means is that he will let the light stay on because the O2 sensors will not be plugged into the non-existent cats. He will not be coding anything out. Just clearing the O2 codes at a later date once they get re-routed properly.

mousitch · 10-31-2013, 10:49 AM

Quote:

Originally Posted by nekky

I think what he means is that he will let the light stay on because the O2 sensors will not be plugged into the non-existent cats. He will not be coding anything out. Just clearing the O2 codes at a later date once they get re-routed properly.

Correct. See how long I can run catless before it drives me nuts

Geauxkart · 10-31-2013, 12:05 PM

Has anyone tried this:
http://www.o2simulator.com/index.php...cb8fa640b86151

I have one on my wifes miata. Turbo'd, no cats, OEM ecu with piggyback (no O2 modification) and has worked well.
I'd be interested to see if it will fool the BMW ECU?

mousitch · 10-31-2013, 02:00 PM

I had one on my 06z4m. No worky. It was by a different company though also.

E92M3Pilot · 10-31-2013, 02:37 PM

I'm planning on running the same setup as mousitch proposed, completely catless with DKF resonator until section 1 cats arrive. Would it cause any harm if I kept the O2 plug in to the headers and not section 1?

More input regarding performance and other side effect would be appreciated. Thanks.

10-30-2013, 07:17 PM	#1
mousitch Dark Sider 129 Rep 1,779 Posts Drives: 2008 Space Gray Z4MC Join Date: Jan 2010 Location: Missouri iTrader: (11) Garage List 2008 Z4M Coupe [7.50]	Quick CEL question/headers Euro headers and DKF section 1. If i choose to not bypass my O2 sensors to my cats will performance be hampered? The CEL doesnt bother me as long as it doesnt affect performance or cause other issues. __________________ [URL=http://imageshack.us/photo/my-images/153/071jt.jpg/] 2008 Space Grey M Coupe-Euro headers-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap with O2 and EGT delete-H&R Sport springs-Zeck CDV delete-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Uniden R7-H&R front and rear spacers-Alarm module added-stereo amp recoded to vert spec settings
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10-30-2013, 08:51 PM	#2
inTgr8r Lieutenant General 2426 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	I have been running mine that way for the last month including track time. Seems to run just fine. __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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10-30-2013, 09:37 PM	#3
i2ichal2dZ4M Lieutenant 62 Rep 516 Posts Drives: 2007 BSM Z4MC Join Date: Mar 2011 Location: Los Angeles, California iTrader: (1)	how much is a tune normally? need to figure in the cost to turne, then detune for smog purpose and retune and see if itll be worth it. __________________ 2007 BSM Z4M Coupe - 18" VOLK TE37 - 18" Apex ARC-8 - GC Track/Street
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10-30-2013, 09:58 PM	#4
mousitch Dark Sider 129 Rep 1,779 Posts Drives: 2008 Space Gray Z4MC Join Date: Jan 2010 Location: Missouri iTrader: (11) Garage List 2008 Z4M Coupe [7.50]	Just think Im going to slap on headers and tie up o2's for awhile. Run DKF with resonators. I can clear the codes myself if I ever need to. Looks to me rerouting o2's will be a bitch. __________________ [URL=http://imageshack.us/photo/my-images/153/071jt.jpg/] 2008 Space Grey M Coupe-Euro headers-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap with O2 and EGT delete-H&R Sport springs-Zeck CDV delete-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Uniden R7-H&R front and rear spacers-Alarm module added-stereo amp recoded to vert spec settings
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10-31-2013, 12:05 PM	#9
Geauxkart Second Lieutenant 13 Rep 280 Posts Drives: 2007 Z4 M Coupe Sepang Join Date: Jan 2012 Location: Baton Rouge, LA iTrader: (3)	Has anyone tried this: http://www.o2simulator.com/index.php...cb8fa640b86151 I have one on my wifes miata. Turbo'd, no cats, OEM ecu with piggyback (no O2 modification) and has worked well. I'd be interested to see if it will fool the BMW ECU?
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10-31-2013, 02:00 PM	#10
mousitch Dark Sider 129 Rep 1,779 Posts Drives: 2008 Space Gray Z4MC Join Date: Jan 2010 Location: Missouri iTrader: (11) Garage List 2008 Z4M Coupe [7.50]	I had one on my 06z4m. No worky. It was by a different company though also. __________________ [URL=http://imageshack.us/photo/my-images/153/071jt.jpg/] 2008 Space Grey M Coupe-Euro headers-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap with O2 and EGT delete-H&R Sport springs-Zeck CDV delete-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Uniden R7-H&R front and rear spacers-Alarm module added-stereo amp recoded to vert spec settings
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10-31-2013, 02:37 PM	#11
E92M3Pilot E86MPilot 23 Rep 265 Posts Drives: F10 550XI Join Date: Apr 2008 Location: North Jersey / Phila iTrader: (3)	I'm planning on running the same setup as mousitch proposed, completely catless with DKF resonator until section 1 cats arrive. Would it cause any harm if I kept the O2 plug in to the headers and not section 1? More input regarding performance and other side effect would be appreciated. Thanks. __________________ E46M, E60/545I, E36/Z3M, E92M DTC, E93M 6spd, E86M(x2), F10 550XI (S2)(Current)
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