o2 sizes

[evil16v]

what size bung do most wide band 02 a/f meters use? the 17 or 18? or other?

May finally finish the exhaust on my car this weekend and don't know what bung to use.

[evil16v]

ttt

[Hector]

The Edelbrock A/F meter that I incorporated on my test stand came with an O2 sensor with 18mm threads.I don't know about others.

[tlivingd]

per the online megaquirt manual

"If your car did not come with an oxygen sensor, you can add one. The thread for all oxygen sensors [including wide-band] is: 18mm x1.5mm - i.e., a metric thread 18mm in diameter with a pitch of 1.5mm, the same as 18mm spark plugs.


To fabricate a bung to mount your sensor, you can go to your local automotive parts store and look in the section with all the HELP products. Pick up a package of "18mm Spark Plug Anti-foulers". Cut off the externally threaded part, and weld the rest to your manifold or down pipe. This works wonderfully and you can do 2 cars for 4 bucks. You can also get them from a speed shop under Holley part number Holley's 534-49 (http://store.summitracing.com/partdetail.asp?autofilter=1&part=HLY%2D534%2D49&N=700+115&autoview=sku) or MSD part number 2335 for about $10. Or you can go to muffler shop and ask for an O2 bung. And they can weld them in for you too."