question about exhaust cut outs and wideband - Performance Forum

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question about exhaust cut outs and wideband
Tuesday, October 18, 2011 12:13 AM
Ok I'm going to installing my Saab stuff on my new blue 04 when I get a motor this weekend. What I want to know is how far past the wideband sensor should I place the cut out? Thanks guys.




Re: question about exhaust cut outs and wideband
Tuesday, October 18, 2011 1:41 AM
shouldnt matter



Re: question about exhaust cut outs and wideband
Tuesday, October 18, 2011 4:14 AM
i have the wideband in my long tube header, followed by the cat, followed by the y pipe with my cutout...

i notice that when idling, the wideband reads a bit leaner than normal with the cutout open.




Re: question about exhaust cut outs and wideband
Tuesday, October 18, 2011 7:07 AM
Mystic02VA (GME Chat) wrote:i have the wideband in my long tube header, followed by the cat, followed by the y pipe with my cutout...

i notice that when idling, the wideband reads a bit leaner than normal with the cutout open.


Makes sense, exhaust is flowing better.



FU Tuning



Re: question about exhaust cut outs and wideband
Tuesday, October 18, 2011 7:16 AM
Yea shouldnt matter










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Re: question about exhaust cut outs and wideband
Tuesday, October 18, 2011 10:19 AM
Cool thx guys



Re: question about exhaust cut outs and wideband
Thursday, October 20, 2011 12:26 PM
At least a foot irrc from the innovate full instructions. You can pull air back in the exhaust exit with the same pulses that cause scavenging and really mess up your o2 readings.


1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
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Sponsored by: Kronos Performance

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Re: question about exhaust cut outs and wideband
Thursday, October 20, 2011 1:00 PM
where is your cut out going to be? mine is pretty much right under the shifter. My wideband, I want to say is like 18" away from the turbo, and my o2 sensor is 24" or so? Also, when you do them, dont put them inline in the pipe, offset them on different sides of the pipe. If you dont it will disrupt flow and give you bad readings. id bet from my sensors to the cutout its 2'or more.




Re: question about exhaust cut outs and wideband
Thursday, October 20, 2011 1:02 PM
Your narrowband is further from the turbo than your wideband? But narrowband have a higher operating temp than widebands...


1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by: Kronos Performance

WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer
Re: question about exhaust cut outs and wideband
Thursday, October 20, 2011 1:05 PM
maybe its reversed, i cant remember. actually im sure it is, cuz on my old one the wiring came down by the trans tunnel, but the wb wiring was zip tied to the steering rack.



Re: question about exhaust cut outs and wideband
Thursday, October 20, 2011 1:24 PM
I'm going to have it just like yours. Under the shifter. And thx leafy that's the exact reason I asked that question because of what you just said I figured there was a reason for putting it a little ways from the wideband




Re: question about exhaust cut outs and wideband
Thursday, October 20, 2011 1:30 PM
you should have about 4' worth of pipe from turbo to cutout. Try 16-18" from turbo for wideband, and go 24-30" for the o2 sensor. then should have plenty of room to the cutout.



Re: question about exhaust cut outs and wideband
Thursday, October 20, 2011 4:09 PM
see my header comes down to about 6" past the firewall, with the two bungs side by side in the collector. My cat is about 18" long, and then there is the y pipe for the cutout. My cutout is under the passenger seat about 3" past the shifter.

example




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