Full Akropavic o2 bung size

Alkhater · May 15, 2022

Wondering what the o2 sensor bung size is on the full akra manifolds.

Is it 12 or 18mm?

Meaning… is it only for narrow band sensors or can it accommodate wide band sensors as well?

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BP PanigaleV4S · May 15, 2022

Narrow only unfortunately.

M12x1.5

Alkhater · May 15, 2022

Thanks for the reply.

So one would need an adapter like Narrowband to Wideband O2 Adapter to read the AF ratio.

BP PanigaleV4S · May 15, 2022

Or drill a hole and weld on a wide bung. I saw that narrow to wide adapter before. I wonder if having the sensor directly in the pipe would make a difference as to the quality of the sample it was getting. I had planned on asking Woolich about when I get ready to buy their tuning kit.

endodoc · May 15, 2022

I have a bunch of wideband Ti bungs if anyone needs a set (no charge). They came with the Storm stuff. On Wollich, I mounted everything to a spare tail pan. If I want to log, I just swap the blank pan, plug it in and put the O2 on otherwise I don’t keep any of it on the bike and plug the O2s. The wideband adapter works but check for clearance issues.

Alkhater · May 15, 2022

bp_SFV4 said:
Or drill a hole and weld on a wide bung. I saw that narrow to wide adapter before. I wonder if having the sensor directly in the pipe would make a difference as to the quality of the sample it was getting. I had planned on asking Woolich about when I get ready to buy their tuning kit.

Welding in a bung could be an option but i don't think there's any reputable ti welders where I am. I would attempt it myself but a 4k akra would be expensive test material so i'd have to order some ti scrap and buy a tig welder.

O2 sensor protrusion into the pipe seems to be an important part of obtaining an accurate reading according to this video

also from this Motec pdf

Full Akropavic o2 bung size

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