vibrant j style o2 spacers

[Riptide]

Got a set of these to try out. These have three different "jet" sizes you can choose from.

What would be the best jet size to choose on these? I'd like to get this right the first time since the midpipe may need to come out for the install.

Thanks

http://www.jegs.com/i/Vibrant-Perfo...MI6OfJxcnf1AIVnY2zCh3zFA79EAkYAyABEgK1R_D_BwE

 

[o2sys]

I just got the 90 degree angled ones.

https://www.ebay.com/itm/261704858465

 

[46addict]

Maybe measure the hole on spark plug non foulers as a reference point.

 

[Riptide]

Well your standard non foulers don't really have any pills (aka "jets") to insert they just pull the sensor out of the stream. Sometimes that is enough. Other times people need to isolate the sensor a bit further.

 

[46addict]

Yeah I have two non foulers on each sensor. What you posted does the same thing with respect to moving the sensor away from the stream.

The rear sensors measure cat efficiency by seeing if the egt is within a certain range, and the point of having different pills is to hit a certain temp target.

I know none of this is a definitive answer to your question but maybe it will get the ideas flowing.

 

[Riptide]

I'm doing some reading and asking around. If I can't find a definitive answer then I'll go with the middle of the three pills and hope for the best.

This is plan B to try and get the monitors to pass. If this doesn't work I may replace the sensors. Plan C is to convert to HP Tuners. Friend of mine has no cats and a paxton. On his config the O2 will pass but not the cat efficiency. Might be able to tweak my tune to produce the same result. Can't do it with SCT.

In NV you can have one monitor fail and still pass emissions.

 

[46addict]

Are you tuning it yourself?

 

[Riptide]

Nah not tuning it myself. Vendor tune on the car right now that went on there when the blower was installed. Friend of mine looked at it in HP Tuners and it does not disable the rear O2 or turn off the testing. It does somehow keep the CEL from popping up though.

Loading another tune on there is something I may try at some point but only as a last resort. Tune on the car now is good for all other practical purposes.

I want to give the defoulers a shot first.

 

[Sky Render]

The rear sensors measure cat efficiency by seeing if the egt is within a certain range, and the point of having different pills is to hit a certain temp target.

Actually, the rear oxygen sensors measure OXYGEN (hence the name), not exhaust gas temperature.

 

[46addict]

This thread is about mimicking cat efficiency to avoid a CEL. One way the rear o2 sensors measure cat efficiency/fuel mixture is by taking a sample of EGT and comparing it with the acceptable temp range. I was not implying o2 sensors are EGT sensors.

 

[o2sys]

Ninja Edit: Nevermind you have a yote.

 

[Sky Render]

This thread is about mimicking cat efficiency to avoid a CEL. One way the rear o2 sensors measure cat efficiency/fuel mixture is by taking a sample of EGT and comparing it with the acceptable temp range. I was not implying o2 sensors are EGT sensors.

They are just a narrowband O2 sensor. They make sure the AFR is correct after the cats. The downstream O2 sensors are basically supposed to be at stoich at all times (0.5 V) to show that the catalytic converters are doing their job. If they fluctuate between 0.2 V and 0.8 V (like an old-school narrowband sensor), then the cats aren't doing their job.

The spacers work by smoothing the exhaust "pulses" that reach the sensors, evening out that fluctuating AFR.

There is no temperature measuring other than the use of heaters to get them up to temperature quicker during startup.

 

[Riptide]

H pipe comes off the car and I'm putting these defoulers in over the weekend. Still not sure which pill to use so I'll go with the middle size and hope it does the trick.

 

[steve13gt]

In for results, I have another 2 years until I need to worry about emissions testing, but this looks like a good option.