O2 Sensor Placement

[sseebart]

For those who have switched over to EFI, where did you install the O2 sensor?

I'm getting ready to reinstall my engine and while I'm not pulling the trigger on EFI yet, I want to install a bung for the O2 sensor while the motor is out and the exhaust is accessible. But, I want to make sure I can reach it and that the sensor fits when the motor is back in place.

~Steve

[jtschug]

I put them in the exhaust pipes just after the headers. FPA sent the header flanges with the bungs already welded in.

[grburas]

I run an MSD Atomic. I put the sensor on the passenger side downpipe of the exhaust "H-pipe" approx 3 inches from the flange mounted at approx 25 degrees tilt toward the fender. Be sure to mount in a manner that does not interfere with getting a socket on the exhaust flange.

[stubbie]

I would place it in the pipe just after the bend to the outside so it is sort of under the car and accessible. All that depending on how far away that is from the cylinder head of course. I think they recommend about 2 ft unless the sensor is heated then you can put them anywhere.

[sseebart]

Thanks, everyone. I actually took a stab at this a few weeks back, and as you can see from the photo, I am an idiot: I (partially) welded the bung on before noticing that the flange was on the wrong side.

I had to order some new bungs, then wait out a severe heat wave, but am hoping to cut this one off and weld another in its place this weekend. I'm kind of commited to this location, as you can see, but I can always tack weld a plug here and try another location if this is a terrible placement.

~Steve

[stubbie]

It was a good bit of welding though Steve.