[Twin Cam]

Air Fuel Ratio monitors?

Hello everybody

Does anyone have experience with Air Fuel Ratio measuring devices?

I've found one from K&N and I just wondering if it could be useful for carb tuning.

Thank you in advance for your help

 

[tsuter]

RBRacing.com has a decent one but ensure you have the four wire heated o-sensor. Most guages are not worth much. Needs to be LED with 7-9 LED bars green yellow red. Need to visibly calibrate against a real dyno with AF so you know what the reading means for your bike before adjusting fuel. Lambdaboy.com has the only and most accurate wide range meter and interfaces to laptop but looks like hell on a street bike.

 

[Sidewalk]

Any O2 sensor would be helpfull. Heated is a bonus. Just remember that they are not very accurate, unless it is a "Wide band" ($$$). Try to stay as absolutely close to 14.6/7 as possible, error on the side of rich.

If it is not heated, you will need to get it hot first with a good ride.

www.diy-efi.org has some instructions on making a reader for an O2 sensor. It could also be done with a voltmeter.

 

[sbc charlie]

Two ways, the semiprofessional way, or the professional way.


HIPPO (undercover) LOL

 

[Twin Cam]

Thank you very much for your indications!


What about the look? Not so bad...

I only want to use this type of monitor temporally so my idea is to put it
in the right muffler (FLSTS '01 carb) but I'm a little bit worried about accuracy in this point far away from the engine.

I'll try to heat well the engine first.

We'll see...

Regards