O2 spacer vs. sim for catless DPs?

mikead_99 · 05-27-2009, 02:42 PM

Has anyone tried putting a spacer on the DP O2 bungs vs. using the O2 sims? I know people using test pipes on the 350Z (and other cars I'm sure) just put a spacer in to pull the sensors out of the exhaust flow a little and this gives good values to the ECU. It seems like this is a better approach than modifying the signal with sims since BMW will likely kill your warranty for modifying the ECU with them.

DocSean · 05-27-2009, 02:50 PM

The spacer may or may not work, soldering a diode inline will work...it's a bit of a pain, but a 30 cent mod, and fairly undetectable. A good alternative would be to just run the damn cats.

05-27-2009, 02:42 PM	#1
mikead_99 Second Lieutenant 6 Rep 201 Posts Drives: 08 SMG 135i Join Date: Nov 2007 Location: NoVA iTrader: (1)	O2 spacer vs. sim for catless DPs? Has anyone tried putting a spacer on the DP O2 bungs vs. using the O2 sims? I know people using test pipes on the 350Z (and other cars I'm sure) just put a spacer in to pull the sensors out of the exhaust flow a little and this gives good values to the ECU. It seems like this is a better approach than modifying the signal with sims since BMW will likely kill your warranty for modifying the ECU with them. __________________ 135i ....
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05-27-2009, 02:50 PM	#2
DocSean Private 9 Rep 93 Posts Drives: Join Date: Sep 2008 iTrader: (0)	The spacer may or may not work, soldering a diode inline will work...it's a bit of a pain, but a 30 cent mod, and fairly undetectable. A good alternative would be to just run the damn cats.
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