just thought I would post this up for comment

I repositioned my O2 bungs on this pipe before I fitted it, in the past my O2 sensors have always been very black and sooty now they are a tanned color. the pic of my pipe shows minimal discoloration which tells me that it has'nt been getting to hot

 moving them closer to the head probly not the best idea!

then thats just my opinion lol

I'm pretty sure that they have to be a certain distance from the flange, otherwise you will get erroneous readings, It may affect your AFR due to them being to close to the flange.. You could have acheived the same result by machining down the existing bungs

I run a open loop map and there only there when Vtuning but with them in this position my tune was in really good shape IMO

 

Interesting, I spose ya could attribute the black sooty sensors to it running rich,,,,which in turn could have been attributed to the sensor position/location affecting the quality of the tune. 

Sort of , which came first, the chicken or the egg ?

 

So, it gets even more interesting, (for me) , H-D in all thier wisdom and experience fitted the small Bosch sensors to my 2012 SE 110 machine,,,

(SE Headers and mufflers)

and, as far back down the headers as they could, at 90 degrees to the flow, just before the crossover/expansion/two into one box.

 

That puts them about 24" back from the head. 

with the sooted up O2 sensors I was referring to my 103 and 106 engines with different pipes, I even had a faulty O2 sensor back then because of it being sooted up/to rich

but with the repositioning they look much healther,

once again all just my experiences and opinons

 

Exactly Hilly, I'm with ya, different horses for different courses, and all those in between.

 

(Rambling on,

I still find it interesting  that there are quite a few variations for component selection and set-up depending upon the build and expectations from the builder.

As seen around the traps, how many different builds are there that are quite different,,,,,,,but are aiming for, and end up at the same result ?,

 and I guress that's because the builder wants it that way.

And then, as you know, the time and effort to create a custom tune to meet all those variations and fit the bill.

It's all part of the fun, challenge, and interest in getting the machine to perform the way one wants it to.

How the hell did we ever survive 40, 30, 20 years ago before the advent of the ECM and the O2 sensor ???

Pretty damn amazing stuff all this for a bloke that experienced the change from setting points with feeler gauges to hooking up a dwell meter when they first came out. And reckon I've still gota 3/8" dia dent in me right earhole from sticking plastic tubing in it to tune tripple SU's !   

 

R.I.P Rod Styles Snr, the bloke that taught me everything I forgot, he'd turn in his grave if he saw what we did to his dyno, and who knows what he'd do if he saw todays technology.

His favorite quote back then was " Son, there's no substitute for cubes "  

end ramble )

 

 

Could someone explain the difference of closed and open loop? Also is the reason for different exhaust for 2011 and 2012 Dyna Superglide the o2 sensor size and position ?

Do Harley run closed loop on any models as standard/stock ?

hey hilly how things man ? as u know me was exhaust tech for 30 plus an the biggest prob with unleaded vechiles is the placement of sensors this goes for cars n bikes the sensor outter you see with the veins is stainless an the core is ceramic snesors need to bee at a minimun of 1200 deg and most just get to 600 in the spot the stock ones are also the sensors dont sit in the flow correctly an most just stick out as in some the vance n hinze ones on the old drag bikes we ran em as close to the port as possible an if i make pipes i still do if for example they were bit further away all the ecm is gettin is the spent gas mix away from where the gasses mix explode ect if the sensor is closer to the port it gets a more correct reading of wat did happen in the chambers ect .also the heated ones only heat on startup not continually so they to need to be as close as possible or once again they get spent gas readings ..andos done the right thing movin them up an into the pipe more an his tunes will be easier an bike will run smoother as well the techy bloke at HOOKER HEADERS made it easy to understand when i was there yrs ago .IF YA WANT THE TEMP OF THE HUMAN BODY DO YOU TAKE IT FROM THE OUTSIDE OR THE INSIDE WHERE THE MAIN HAPPENINGS ARE GOIN ON lol pretty simple hey

Ol Skool you would be an open loop man, yeh????

i prefer closed loop ando open is to much a head fuck lol

been busy as here hilly
just had the black n gold softy photot shoot for ozbike an got another full build on the way an 4 other bikes to sort an done deadwoods motor few months ago

i get the shits when i see no sensors in the pipes ok if ppl want to do that up to them but if ya want to tune ya bike an do everything the ecm is designed to do ya may as well go carby lol i used to have heaps ppl wantin the sensors out of their cars when i had lees exhaust shop an i wouldnt take em out same as the catos .an now in this day and age the cops an mainroads blokes are gettin alot smarter they are startin to check for sensors in pipes an they already busted 4 ppl around here one was a vrod with the catos taken off once the noise pollution mob gets into qld there will be a lot of ppl gettin done ..it has happened in syd an vic an now they are firing the mobile mobs up doin side of road decible tests an doin the emission test with the sticker that changes colour on the pipe dont know how the new db meters work but the older ones picked up cam noise an lifter noise ect ohhhh well if ya ride a harley its the risk ya take hey lol