When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
I am about to install a Bassani Road Rage 2-1 on my 2015 Fat Bob. I have read several things about leaving the O2 sensor out and installing the bung. What are the pros & cons of this. I have heard using an 18mm-12mm reducer lifts the sensor out of the optimal gas flow. Does leaving it unplugged not throw a code?
Running with or without the O2's is always a debate. Your tuner takes care of the fuel needs but your right if you unplug the O2's you will get a light unless you use a plug in thing called an "optimizer" to replace the ECM's need for feedback from the O2's.
There was a good discussion about this issue and the V&H fuelpack not too long ago,, it ended with the OP contacting V&H and they sent him the optimizers for free.
It's all about what's called Open loop/Closed loop in the fuel circuit and what the O2's actually do.
Please read this thread, all 4 pages with some links about the Open/Closed thing, it's worthwhile for understanding. https://www.hdforums.com/forum/gener...2-sensors.html
I'm running mine with no O2's and all is well.
Here was post I had created for the same issue awhile ago. Hopefully this will shed some light on the situation.
I wanted to explain the reasoning behind eliminating the O2 sensors and why we recommend this. First, this is a last resort for us when a customer's exhaust system does not have the O2 sensors properly placed in the exhaust stream. Without proper immersion, port-distance and clocking on the exhaust, the O2 sensor will not have proper saturation in the exhaust stream. This can cause improper sampling that leads to incorrect Adaptive Fuel Value's (short term and long term trims). This is when a company does not re-tool for the new O2 sensor sizes or does not use new technology like our "Super-Bung". Instead they use adapters or reducers. This pulls the O2 sensor out of the exhaust and also creates a pocket. Obviously this is not conducive for for proper O2 sampling. Below is a photo example.
Short exhausts with wide-open baffles can also make this effect even worse because the effects of reversion.
Below is a short video explaining our super bung and displays how we place the O2 sensors in our exhaust systems.
So when a customer has a setup such as this, we recommend to disconnect the O2's to force the bike into Open loop. This does not compromise the bikes reliability or create a Forced Power Management Mode (Limp Mode). I am currently working on a way to turn off the O2's within the app (forced open loop). Thus no longer needing the use of eliminators. Which are only an inline resistor.
Here was post I had created for the same issue awhile ago. Hopefully this will shed some light on the situation.
I wanted to explain the reasoning behind eliminating the O2 sensors and why we recommend this. First, this is a last resort for us when a customer's exhaust system does not have the O2 sensors properly placed in the exhaust stream. Without proper immersion, port-distance and clocking on the exhaust, the O2 sensor will not have proper saturation in the exhaust stream. This can cause improper sampling that leads to incorrect Adaptive Fuel Value's (short term and long term trims). This is when a company does not re-tool for the new O2 sensor sizes or does not use new technology like our "Super-Bung". Instead they use adapters or reducers. This pulls the O2 sensor out of the exhaust and also creates a pocket. Obviously this is not conducive for for proper O2 sampling. Below is a photo example.
Short exhausts with wide-open baffles can also make this effect even worse because the effects of reversion.
Below is a short video explaining our super bung and displays how we place the O2 sensors in our exhaust systems.
So when a customer has a setup such as this, we recommend to disconnect the O2's to force the bike into Open loop. This does not compromise the bikes reliability or create a Forced Power Management Mode (Limp Mode). I am currently working on a way to turn off the O2's within the app (forced open loop). Thus no longer needing the use of eliminators. Which are only an inline resistor.
Please keep us updated as to when the app will allow for turning on/off the o2 sensors, Thanks.
I just had my bike dyno'd and had the PCV installed at the same time, taking off the Superchips tuner. He pulled the O2 sensors, saying they are worthless with a tuner unless the tuner is designed to work with the o2 sensors, i.e. PC Autotune, SE Race tuner or the Thundermax. I believe he said something along the lines of the aftermarket tuners aren't designed to communicate with the sensors, rather to just be setup to run a set programmed value. If they do or don't, I can tell you this, my bike runs and feels a lot better with the PCV and bungs.
I am about to install a Bassani Road Rage 2-1 on my 2015 Fat Bob. I have read several things about leaving the O2 sensor out and installing the bung. What are the pros & cons of this. I have heard using an 18mm-12mm reducer lifts the sensor out of the optimal gas flow. Does leaving it unplugged not throw a code?
When i had a PCV on my Road King I plugged the bungs and It ran like a bat outta hell so, why shouldn't that be the case with any other big twin?
I'm just bummed! My 07 fxdb had open slip-ons stock header with LED fuelpak and ran good/better then my new set up which is a bassani 2 into 1 and FP3. I'm having pretty heavy decel pops and some back firing. Ive checked for leaks and have even used some red RTV on the slip joint just for good measure but still get some pretty violent backfiring on decel. I'm now contemplating going back to the slips and LED pak or trying the LED Pak with the Bassani but thats throwing a lot of money down the pot.
Omitting O2 sensor with FP3
