Borla UEL Header, any dynos yet?

[ultra]

Working around the CEL issue via tinkering with the ECU or by drilling hoses and relocating O2 sensors sounds like a bit of a PITA.


Wonder if they're doing a catted version or, if not, why?

[FR-S Matt]

Originally Posted by ultra

Working around the CEL issue via tinkering with the ECU or by drilling hoses and relocating O2 sensors sounds like a bit of a PITA.


Wonder if they're doing a catted version or, if not, why?

Some companies are planning on a catted version. Only problem with catted is it restricts airflow in the most important part of the exhaust. In some places, it will get you past the sniffer test having both cats.

I've seen people daisy chain with male/female connectors for an extension or just have a 4 foot extended cable ziptied up that extends back to the secondary cat making it their primary and bypassing the first cat. I'm almost positive that requires a tune to remove the first cat sensor.

[FR-S Matt]

Originally Posted by stockysnail

I'm guessing a sensor bung is a hole in the exhaust tube that the plug goes into to monitor the o2? That would mean that I'd need an exhaust shop to drill a hole in the exhaust past the 2nd cat for the plug? or cut the wire and wire it into the 2nd bung. I wonder if that would be as easy as cutting the wire and daisy chaining the wires together...

Sensor bung is that little hole the size of a nickel that the O2 sensor screws into.

Yes, that is one way of doing it, or you could have them put a bung on the header if it doesn't have one far enough back so it doesn't pick up a huge amount of flow from the collector to avoid a CEL for running rich. I've seen others reprogram the main sensor post cat as well. There's several ways to do it. Exhaust shops are able to fabricate a bung anywhere on the pipe you want I'd assume. Some vendors have been posting about the Borla header not throwing a CEL and same with the JDL one so far.

I'd find a header solution that has a built in bung and not mess with the far extension of the sensor to the front pipe or post second cat. Depending on how good our stock O2 sensors are, they may burn out after 30k miles and need better aftermarket ones. Time will tell.

I plan on going with a catless header but keeping a catted front pipe so I don't pollute the hell out of everything. The flow from the header to the downpipe/overpipe is where the biggest gains occur and that's the spot you don't want to restrict as much.

Just my 2 cents. Someone correct me if I'm wrong. The back half of the exhaust isn't too important especially if you're NA. FI is another story.

[deucethemoose]

Borla should have done an O2 bung like my old PDE down pipe.

[ultra]

If somebody finds a way to add a bung to the Borla header which fits and avoids the CEL issue that'd be sweet.

Bit curious why Borla wouldn't do that themselves though. I'd hate to have a mechanic hack into my new header only to encounter clearance issues or worse, quality issues with the bung cracking at the weld or not fitting / not working.

Suppose we'll have to wait on some guinea pig types to show how it's done.

[gmookher]

Originally Posted by ultra

Suppose we'll have to wait on some guinea pig types to show how it's done.

Planned.

[seven]

Originally Posted by ultra

If somebody finds a way to add a bung to the Borla header which fits and avoids the CEL issue that'd be sweet.

Bit curious why Borla wouldn't do that themselves though. I'd hate to have a mechanic hack into my new header only to encounter clearance issues or worse, quality issues with the bung cracking at the weld or not fitting / not working.

Suppose we'll have to wait on some guinea pig types to show how it's done.

Easiest way is...

Install it yourself and not where the stock O2 is
Mark it off in a close location (where it will fit on the car) on the test pipe
Buy O2 bung
Take off test pipe and have a shop weld in the bung


Not super easy but not rocket science either. Did this with my STI and my Corvette.

[BeltedBiscuit]

I thought I'd chime in here since I have a UEL header from Borla. All I did to ensure I didn't though a CEL from the cat delete is to move the O2 sensor about in inch away from the exhaust flow. I placed the O2 sensor into a Spark Plug Non-Fouler that I bought at AutoZone for 4bucks. (http://www.autozone.com/autozone/par...er=720805_0_0_)

I found this video on youtube that pretty much explains the process. This is not an FRZ/BRZ in the video but it's the same thing I did to move the 02 sensor: [ame="http://www.youtube.com/watch?v=GqDmmLQ4pGk"]Clear check engine light for less than 5 dollars - YouTube[/ame]

I've had the headers on my car for about a month now, no CEL.

[seven]

Originally Posted by BeltedBiscuit

I thought I'd chime in here since I have a UEL header from Borla. All I did to ensure I didn't though a CEL from the cat delete is to move the O2 sensor about in inch away from the exhaust flow. I placed the O2 sensor into a Spark Plug Non-Fouler that I bought at AutoZone for 4bucks. (http://www.autozone.com/autozone/par...er=720805_0_0_)

I found this video on youtube that pretty much explains the process. This is not an FRZ/BRZ in the video but it's the same thing I did to move the 02 sensor:

I've had the headers on my car for about a month now, no CEL.

Very common fix also.

[FR-S Matt]

Sounds pretty smart, whatever keeps that sensor from reading a flow increase.

[01s0uljah]

[ame]http://youtu.be/YHP6SiiToOY[/ame]

[Eyesacky]

I installed my Borla UEL headers from JSCSpeed this past weekend. Mine has two bungs and was able to mount both O2 sensors without throwing any CELs. The sound is amazing and I'll have a video up by next weekend

http://instagram.com/p/W8UhLQjdiA/
follow me on instagram @Eyesacky

[norsamerican]

Originally Posted by Eyesacky

I installed my Borla UEL headers from JSCSpeed this past weekend. Mine has two bungs and was able to mount both O2 sensors without throwing any CELs. The sound is amazing and I'll have a video up by next weekend

http://instagram.com/p/W8UhLQjdiA/
follow me on instagram @Eyesacky

how many miles have you driven it? The CEL will come on its only a matter of time.

[ATL BRZ]

I want a working CEL solution without a tune and then I'd consider buying.