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Post by JerryScript on Feb 8, 2015 13:03:02 GMT -5
Just trying to keep it clean. IF there is a perfectly good hole there already, I wouldn't want to make another. I'm not going to make a decision on mounting till I have parts in hand, and can determine the best orientation for everything. I am the same way. It would just bug the heck out of me drill a hole in the pipe when there is already one there. Since you are waiting a little till installation. It may be helpful the get an infered thermometer to test how hot the pipe gets in the selected location. That why you could see if you are within operating temps. My ride to work takes about 10 minutes. During this cold season the location of my sensor gets to about 450-500F. What's the max a standard O2 sensor is rated for, or better yet what is the recommended safe zone for temps and best operation? |
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Post by JoeyBee on Feb 8, 2015 13:14:22 GMT -5
The manual for the sensor I have states: The maximum temperature of the sensor at the bung (the sensor mounting location) should not exceed 500 oC or 900 oF. If these temperatures are exceeded in your application you should install the Innovate Motorsports HBX-1 heat sink bung extender.  /n 3729.) Using a clock as reference, mount the bung between the 9:00 o’clock and 3:00 o’clock position. Welding the bung in the lower section of the exhaust pipe can result in sensor damage caused by condensation making contact with the sensor’s internal heating element. A 1” bung (provided in the kit) will best protect the sensor. When fully threaded, the sensor’s tip will sit flush with the exhaust pipe, this does not adversely effect the readings. Source: www.innovatemotorsports.com/support/manual/MTX-L_print%201.2.pdf |
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Post by JoeyBee on Feb 8, 2015 13:17:12 GMT -5
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Post by dmartin95 on Feb 8, 2015 13:44:16 GMT -5
Hey, that's a very nice job! It looks stock and very clean!  |
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Post by JoeyBee on Feb 8, 2015 13:56:04 GMT -5
Hey, that's a very nice job! It looks stock and very clean! Thanks. The thought was to place the sensor as far back as possible to minimize heat. I grinded up the spot for a good welding surface, but repainted with an exhaust paint rattle can when done. |
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Post by JerryScript on Feb 8, 2015 14:03:00 GMT -5
Very clean install, I hope I can do as well! In your pics, it looks like the overall length is 4-5 inches or so, from the pipe to where you can bend the wire?
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Post by JoeyBee on Feb 8, 2015 21:43:43 GMT -5
It measures 11" from the exhaust manifold. Below is a picture of the plug I can install when I don't want to have the system activated. Got it off eBay for about $10. It's a T55 hex.  |
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Post by JerryScript on Feb 9, 2015 1:20:46 GMT -5
I meant the length of the probe itself. From the point the bung attaches to the header, to the point the wires can bend, looks like about 4-5"?
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Post by scootdude on Feb 12, 2015 11:26:37 GMT -5
Hey Jerry, all this talk of installing an oxygen sensor is very interesting. I am curious though what the benefit is to installing an O2 sensor on the scooter is. I know that on cars and trucks oxygen sensors, exhaust gas recirculation valves, charcoal canisters, catalytic converters and other such devices are installed for the purposes of emissions control. Here in Arizona, motorcycles and scooters are exempt from emissions requirements. Are you trying to make your scooter pass emissions requirements or is there a performance benefit?
Thanks!
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Post by JoeyBee on Feb 12, 2015 11:37:11 GMT -5
scootdudeI installed the sensor to be able to know exactly what fuel/air ratio my engine was receiving. It made the carburetor tuning very easy, but also allows me to know if the engine is running too lean or too rich. Too lean could result in the engine overheating, and too rich could cause fouling and excessive carbon buildup. Emissions are the least of my worry.
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Post by JoeyBee on Feb 12, 2015 11:45:21 GMT -5
JerryScriptAs a side note while thinking about this thread I discovered a negative aspect of where I mounted the sensor bung. I was bored on my days off from work, so I decided to check my valve clearances. When trying to remove the cooling fan plastic shroud I discoverd the bung is blocking the plastic piece. As a result to remove that plastic piece or flywheel I will have to remove the entire exhaust pipe. Just food for your thoughts.
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Post by scootdude on Feb 12, 2015 11:49:20 GMT -5
scootdudeI installed the sensor to be able to know exactly what fuel/air ratio my engine was receiving. It made the carburetor tuning very easy, but also allows me to know if the engine is running too lean or too rich. Too lean could result in the engine overheating, and too rich could cause fouling and excessive carbon buildup. Emissions are the least of my worry. Wow! Very scientific. I had no idea. That sounds like a great way to keep the carb settings under control. |
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Post by JerryScript on Feb 12, 2015 13:34:31 GMT -5
Hey Jerry, all this talk of installing an oxygen sensor is very interesting. I am curious though what the benefit is to installing an O2 sensor on the scooter is. I know that on cars and trucks oxygen sensors, exhaust gas recirculation valves, charcoal canisters, catalytic converters and other such devices are installed for the purposes of emissions control. Here in Arizona, motorcycles and scooters are exempt from emissions requirements. Are you trying to make your scooter pass emissions requirements or is there a performance benefit? Thanks! Partially for performance, though I know I won't get much more, partially for the joy of experimentation. I'm a tinkerer, I build model stirling engines, so I like to figure things out to the smallest of details. What I really hope to investigate with an O2 sensor is the taper of the needle. One thing never discussed in scooter forums is how the taper may affect your mid range a/f mix. We have good methodology for testing idle and WOT mixes, but the mid-range where we ride our scooters most of the time (or should be), is harder to determine perfect settings for, and is primarily affected by the taper of the needle. Would be nice to know if the taper is set too lean as all other settings are, while it can be adjusted for with other settings, a proper taper would be best. |
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Post by scootdude on Feb 12, 2015 17:21:57 GMT -5
That's very technical. My brother is a GM technician, and when he wants to check o2 sensor readings or other technical readings on the go, he has an interface unit that he plugs into the car's computer and then gets real time sensor read outs. Are you going to rig up some kind of similar contraption to catch the actual readings while riding? I'm pretty sure that you'll get different readings testing it under an actual load vs just revving up in the garage. I look forward to your findings.
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Post by JerryScript on Feb 12, 2015 19:23:47 GMT -5
I'll be keeping it low tech, but in the end it's the same thing, I just have to read values instead of having the computer translate for me. An O2 sensor puts out a certain amount of voltage based on the amount of residual oxygen left in the exhaust stream. All that's needed is a volt meter to read the voltage, that's what I'll mount to take readings while riding visually.
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