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They looked to me like they would cause a significant obstruction to flow. Their only purpose is to help prevent getting a CEL by fooling the secondary O2 sensor when using catless headers. Seems like it works….for a while, for some people.
Oh wow, that's horrendous. Assuming you welded a plug of some sort after the fact.
The external bung is still in place to install the sensor. I just cut out the part inside the outlet pipe, no welding. It’s not pretty, but has to be better than it was…
If possible can I see the end result? The irony is that I haven't found a spyder yet and already know I'm going with these headers, so I'm stacking as much info as possible!
I ground it as close as I dared to the tube wall. I’m sure somebody who trusts themselves better with a grinder or has access to proper machine tooling could get closer, but I didn’t want to chance damaging the tube.
That's why we are here, to learn from each other. I actually have to give credit to Yebokmj for the heads up on this. I ran across his post on another forum that led me down the trail.
That’s pretty significant if it’s repeatable. I’m sure being a little cooler out helped, but not that much.
Significant indeed! As mentioned, I did consistent repeated runs with a delta of less than 0.1 sec. Temp was 26 degrees vs 30 degrees so not much of a difference as you say.
This is more of a case study on the affects of catless long tubes rather than just top gear headers. Should reiterate that these runs were without a tune.
I ground it as close as I dared to the tube wall. I’m sure somebody who trusts themselves better with a grinder or has access to proper machine tooling could get closer, but I didn’t want to chance damaging the tube.
Have a set on order, what did you cut these out with??
03-14-2024, 09:42 AM
