Factory o2 sensor placement on a log manifold turbo setup (trick perfomance style)

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Jun 3, 2014 | 03:35 PM

#11

timmay208

TECH Resident

iTrader: (4)

Joined: Oct 2013

Posts: 830

Likes: 2

From: CDA, ID

Quote:

Originally Posted by boostedsl2

Whatever you do, don't plumb both o2's after the downpipe lol. it won't work

I put driver side in the crossover and pass after the turbo with no issue. I turned of rear o2's with HP tuners. I also have an AEM wide band after the turbo.

I would have plumbed passenger side pre turbo but I found out the hard way after everything was built.

This is how im doing mine. Driver is in the X over pipe, and pass is in downpipe right by frame rail. Wideband is about 8-10" after turbo.

Ive only started my truck and ran it down the road and back so dont know how its going to work just yet

Jun 3, 2014 | 11:22 PM

#12

boostedsl2

TECH Apprentice

Joined: Jan 2005

Posts: 357

Likes: 0

From: St Petersburg, FL

Quote:

Originally Posted by timmay208

It works fine on my setup. I have about 1200 miles on it now. will sit at 14.7 during cruising and at idle. jumps a little bit but nothing out of the norm.

Jun 4, 2014 | 08:50 AM

#13

adunphy

Staging Lane

Joined: Jan 2012

Posts: 70

Likes: 3

From: CT

Thanks for input! My main concern is passing emissions inspection. Of course the modification of any engine exhaust and catalyst control/monitoring is technically illegal but I just want to be sure I can pass the test from the OBDII standpoint.

It may be overkill but I am considering welding in 2 bungs downstream of the cat and installing both the factory downstream NB O2's side by side in that location. It sounds crazy, but what can it hurt?

I'm not adverse to deleting them from the tune but I'm just nervous that I'll fail the emissions test. Its hard to get straight answers in this state (CT) as to what exactly they are testing and looking for.