Wideband bung placement!

[isnms]

I'll post mine for future reference

Exhaust Depot high flow cat has a bung at the front of it:

 

[MA70witBoost]

What turbo do you have and what DP do you have? I have a BIC dp and boss turbo.

Ok, never mind I just looked at your build thread, Nice build.

thanks, glad ya like it. :icon_bigg

 

[tekdeus]

My sensor just died from being too close to the turbo. I just bought one of these heatsinks to try to keep it cooler. It directs the gas over the sensor via the little internal ports.
http://www.diyautotune.com/catalog/innovate-motorsports-hbx1-heatsink-bung-extender-p-73.html

 

[lewis15498]

I think it's suppose to be a minimum of eighteen inches and as far as thirty six inches away from the turbo. Ian is smarter than the average bear so I'd do like he posted.

Ian, I'm wondering why the factory 02 sensor is parked right against the turbo. Does the aforementioned rule not apply to narrow bands, do they need higher heat situations, are they more heat resistant, or was it just a bad decision made by toyota?

 

[isnms]

This site has some good information about widebands including position:
http://wbo2.com/lsu/position.htm

 

[Supracentral]

Ian, I'm wondering why the factory 02 sensor is parked right against the turbo. Does the aforementioned rule not apply to narrow bands, do they need higher heat situations, are they more heat resistant, or was it just a bad decision made by toyota?

Narrowband is a different animal.

PS - The really good info is in the attached file.

 

[IJ.]

Ian, I'm wondering why the factory 02 sensor is parked right against the turbo. Does the aforementioned rule not apply to narrow bands, do they need higher heat situations, are they more heat resistant, or was it just a bad decision made by toyota?

So they heat up faster and get control of mixtures sooner.

 

[lewis15498]

That makes sense.

 

[lewis15498]

Narrowband is a different animal.

PS - The really good info is in the attached file.

great info on widebands, thanks for sharing mike!

 

[A. Jay]

I bought a BIC DDP with the flex section rerouted and second 02 bung options, got it yesterday, and the first thing I noticed was the location of the second bung:

After reading this thread I understand that this is way too close for a wideband sensor. This is what it says on the website:
"Second Screw-in style O2 sensor bung. 18 x 1.5 threads will fit wideband O2 sensors or the cheaper screw-in style O2 sensors."

So why is it so close and what do I do about installing a wideband sensor on this pipe?

 

[tekdeus]

I bought a BIC DDP with the flex section rerouted and second 02 bung options, got it yesterday, and the first thing I noticed was the location of the second bung:

After reading this thread I understand that this is way too close for a wideband sensor. This is what it says on the website:
"Second Screw-in style O2 sensor bung. 18 x 1.5 threads will fit wideband O2 sensors or the cheaper screw-in style O2 sensors."So why is it so close and what do I do about installing a wideband sensor on this pipe?

I had my sensor in this location for a while with no problems on an upgraded CT26. But the sensor quickly died when I ran a larger turbo.

It's a bit expensive, but I've been running the heatsink I mentioned above http://www.diyautotune.com/catalog/i...nder-p-73.html and my new sensor seems to be doing fine, even after a huge local heat wave and running 26psi on race fuel. I think the design of this heatsink is very good and effective, and is good insurance for the life of your sensor.