Monitoring fuel/air mixture - O2 Sensor?
#1
Monitoring fuel/air mixture - O2 Sensor?
With all of this rejetting, airbox and exhaust mods, it may be difficult to determine if we have obtained the proper fuel/air mixture for our particular environment (altitude).
In the past, I have done this analysis by interpreting the spark plug deposits (or lack thereof). I have found this to be difficult to do over the full throttle range. There must be a better way.
I've seen that this can be monitored (not sure exactly how) during a dyno run, but not everyone has ready access to one of these machines.
What about using an O2 sensor and meter? I've read the Nobrakes has installed a O2 sensor, but searched and did not find any details.
What about this device from K&N?
http://www.knpowersports.com/airfuelmonitors.htm
The cheapest that I have found it is from here:
http://www.4filters.com/AirFuel-Rati..._p_6-1745.html
Exactly where would the weld-on fitting be located?
Thanks.
Dan
In the past, I have done this analysis by interpreting the spark plug deposits (or lack thereof). I have found this to be difficult to do over the full throttle range. There must be a better way.
I've seen that this can be monitored (not sure exactly how) during a dyno run, but not everyone has ready access to one of these machines.
What about using an O2 sensor and meter? I've read the Nobrakes has installed a O2 sensor, but searched and did not find any details.
What about this device from K&N?
http://www.knpowersports.com/airfuelmonitors.htm
The cheapest that I have found it is from here:
http://www.4filters.com/AirFuel-Rati..._p_6-1745.html
Exactly where would the weld-on fitting be located?
Thanks.
Dan
#3
RE: Monitoring fuel/air mixture - O2 Sensor?
I used a Bosch universal 4-wire O2 sensor. Two wires are connected to 12V and GND for the heating element, one wire is GND, and the other wire is the Signal. The signal wire produces a voltage and the normal range is 0 to 1V with stoichiometric being at around 0.45V. Optimal for this sensor is around 0.90 to 0.92 V. Here's a photo of my setup:
http://video.google.com/videoplay?do...97445163401854
The big box up front there is basically just a glorified voltmeter. It's temporary and I just had it on long enough to run some mixture tests. I no longer have it installed. When you remove the sensor, you just plug up the fitting with a screw in plug.
The K&N looks to be about the same setup.
Mine helped me a great deal to verify and confirm my jetting changes.
http://video.google.com/videoplay?do...97445163401854
The big box up front there is basically just a glorified voltmeter. It's temporary and I just had it on long enough to run some mixture tests. I no longer have it installed. When you remove the sensor, you just plug up the fitting with a screw in plug.
The K&N looks to be about the same setup.
Mine helped me a great deal to verify and confirm my jetting changes.
#5
RE: Monitoring fuel/air mixture - O2 Sensor?
Nobrakes,
How did you decide where to have the fitting welded? Is there some recommended min/max distance from the exhaust port? ...or does it matter?
Dan
How did you decide where to have the fitting welded? Is there some recommended min/max distance from the exhaust port? ...or does it matter?
Dan
#7
RE: Monitoring fuel/air mixture - O2 Sensor?
ORIGINAL: dmar
I took the easy way and had the dealer rejet on their o2 machine when I had the 300 kit installed.
I took the easy way and had the dealer rejet on their o2 machine when I had the 300 kit installed.
The rest is done by actually riding the bike to see how it feels. In that way, you can pick-up on things like mid-range sputter or surge under a load. If the dealer did all of his measurements inside the garage with an O2 machine, he hasn't done a complete check. Not saying he didn't take it for a spin, but..... Furthermore, if he used only an O2 machinewithout dyno, he hasn't checked much at all very accurately....except for possibly your pilot circuit.
That's where Nobrakes' method can net you better results if you can get steady state readings at different throttle openings...say a long uphill grade.
#8
RE: Monitoring fuel/air mixture - O2 Sensor?
If you have the money, get the LM-1 wideband air/fuel ratio meter. It will record your air-fuel ratio, TPS and RPM while you run.
http://www.innovatemotorsports.com/products/lm1.php
http://www.innovatemotorsports.com/products/lm1.php
#9
RE: Monitoring fuel/air mixture - O2 Sensor?
ORIGINAL: mooredan
Nobrakes,
How did you decide where to have the fitting welded? Is there some recommended min/max distance from the exhaust port? ...or does it matter?
Dan
Nobrakes,
How did you decide where to have the fitting welded? Is there some recommended min/max distance from the exhaust port? ...or does it matter?
Dan
#10
RE: Monitoring fuel/air mixture - O2 Sensor?
ORIGINAL: EvildoerZX10R
Wow Nobreaks! what are all those toggle switches? Do you have a NOS kit?
Wow Nobreaks! what are all those toggle switches? Do you have a NOS kit?