TheSamba.com :: View topic - Where would be a good place to install a wide and O2 sensor?

Tue Apr 16, 2024 9:09 pm

I’m converting my squareback to a modern EFI system. I’m nearly done but I’m having a bit of a difficult time deciding where to install the O2 bung.

Where have other people put it before?

Wed Apr 17, 2024 11:12 am

Stock muffler?
Right here:

This gets a good average of all four cylinders, and is upstream enough to not be biased by any outside air getting drawn in.

Clock it at 2 o'clock (above middle) to keep it dry.

It is also easily substituted for a stock resonator with just a couple of bolts/nuts.

Wed Apr 17, 2024 11:56 am

If you're adding one to a header/extractor system, you'll want it at the collector of the header/extractor (where the muffler bolts on) right before the muffler. Again, clock it at about 2 o'clock to keep it dry.

Thu Apr 18, 2024 12:41 am

It is a stock muffler with all the heater boxes. Thanks for the quick replies.

Fri Apr 19, 2024 2:26 pm

What are you going to do for the FI's air intake? From my understanding, hot intake air is worse for FI then it is for carbs.

Mon Apr 22, 2024 6:29 pm

For now I’m just using the stock intake. I have been designing a new intake manifold in Fusion360 and been 3D printing prototype parts, but for now just using the stock intake to get back on the road.