make rich/lean oxygen sensor on a bike? on this site? WHERE?

[bustinjustin2k]

Hi guys I was reading a post in the forum and someone said.. this:

"There are also articles achieved in the GSR on how to make your own too lean / too rich sensor for your bike using a oxygen sensor"

Sounds awesome but WHERE IS IT?! I cant find it at all, anyone know?

[Einar J Skog]

http://www.markvanderkwaak.com/dbbp/tech-tips/mm.html

Used the search option

[bustinjustin2k]

ugh I totally did I looked up oxygen sensor, too rich, too lean, oxygen, sensor.

What did you type?

None the less, THANK YOU

[Anonymous]

anybody actually welded in an o2 sensor bung in all 4 pipes? seems like it would look rather ugly having 4 o2 sensors seing as they do need to be fairly close to the port so they would be on the front right behind the wheel.

[bustinjustin2k]

good question crazyguy. I never thought about it but I guess you really would have to do it to all 4... bummer. I guess it could look kind of cool, I think it would all depend on how you designed the housing. Having all 4 in each header I can picture like one large housing, covering all 4 sensors, I guess it would look ok with lil flickering lights...

prolly not.. heh

Has anyone actually done this? It sounds like a usefull lil thing though. I dont see why you couldnt use it in old cars and such when you tune the carb right?

[Anonymous]

you dont need it on a car to tune the carb, its only one carb and it distributes to all cylinders. no a bike its typically a carb for each cylinder delivering to only that cylinder.

[bustinjustin2k]

Right it isint needed to tune the carb on a car at all but you could still use it though. I mean, it would just tell you if your too rich or too lean. Ya know just for sheeeits and giggles.

I donno, maybe not, im a moron with too much time on my hands.

[Anonymous]

see what would make having an O2 sensor in every pipe on a bike usefull is getting the inner cylinders running correst cause there sandwiched between to 2cylinders that are sending there heat into the middle cylinders which makes the mixure lean out cause the intake charge is hotter. something like that anyway. somebody will probally come along and correct and/or add to this. but its not uncommon for all 4 carbs on a 4cyl bike to have 4 different jet settings in order for it to run the best.

[Anonymous]

o2 sensor placement

Generally you have 1 O2 sensor and you site it in the section of the pipe that collects the 4 pipes. This way it can see if a cylinder suddely goes lean (eg your inlet stub splits while your out riding). If your going to go to the effort to put 4 o2 sensors in, you might want to look into egr sensors and other such exotica, since one poster mentiones temperatures. elevated centre pot temps wont go hand in hand with incorrect o2 readings, and often you jet the inner pots richer to try take advantage of the cooling effect this offers...
Most cars have a o2 sensor so the fuel computer can run the car at stoich for emissions purposes, and for this purpose a el cheapo o2 sensor is fine.
But nobodys mentioned that a "normal" O2 sensor is narrowband, in that once you get either side of 14:1 (stoich) the accuracy falls off (accuracy curve is bellcurve shaped) pretty steeply, so if you like to run a little rich they tend to not be reading correctly. You can spend a few hundred on getting a wideband O2 sensor and driver that doesnt suffer these problems (do a google for "techedge" kits), but at the end of the day the best thing about having a simple o2 meter is that while your riding along, you can see quickly and easily if something suddenly changes. Anythings better than nothing right? and one o2 bung after the 4-1 collector gives me that little bit of info to get a bike nearish to minimise dyno time and peace of mind and leaves all the complex stuff to the dyno shop, after all thats why I pay them for investing in it!

[Anonymous]

hrmm, how bout for those of is with 4 into 2? just stick an O2 sensor on each side at the collectors?

[Anonymous]

4-2

Then maybe its time to make that 4-2-1-2 exuast system that'll give you more midrange youve been thinking about for ages

[Hoomgar]

Thx Einar, I saved that link for when I am ready to build one.