Xieds ???
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
IED's and their variants are basically resistors that alter the voltage from the O2 sensor and fool the ECM into thinking the AFR is leaner than it really is, thereby prompting it to add more fuel to the mix. They only work in closed-loop mode, which is to say from idle to about 80KPA (~50% throttle), and are non-functional above that point in open-loop. Thus, WOT is unaffected by their presence. Some of these claim to allow changes down to 13.8:1 in closed-loop, but this is outside the functionality of stock NB sensors and may throw a trouble code reflecting that condition.
If you want a bit more cooling and throttle response in the cruise range and plan on keeping the bike near stock, these can provide some improvement, but that's all they'll do. OTOH if you do plan on making even moderate changes to the bike, need spark-advance or AFR changes outside the functionality of the O2 sensors, etc. you'll need a real tuner.
If you want a bit more cooling and throttle response in the cruise range and plan on keeping the bike near stock, these can provide some improvement, but that's all they'll do. OTOH if you do plan on making even moderate changes to the bike, need spark-advance or AFR changes outside the functionality of the O2 sensors, etc. you'll need a real tuner.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
IED's and their variants are basically resistors that alter the voltage from the O2 sensor and fool the ECM into thinking the AFR is leaner than it really is, thereby prompting it to add more fuel to the mix. They only work in closed-loop mode, which is to say from idle to about 80KPA (~50% throttle), and are non-functional above that point in open-loop. Thus, WOT is unaffected by their presence. Some of these claim to allow changes down to 13.8:1 in closed-loop, but this is outside the functionality of stock NB sensors and may throw a trouble code reflecting that condition.
If you want a bit more cooling and throttle response in the cruise range and plan on keeping the bike near stock, these can provide some improvement, but that's all they'll do. OTOH if you do plan on making even moderate changes to the bike, need spark-advance or AFR changes outside the functionality of the O2 sensors, etc. you'll need a real tuner. I'm not besmirching their usefulness to some riders, as IMO they do have a niche in the marketplace.
If you want a bit more cooling and throttle response in the cruise range and plan on keeping the bike near stock, these can provide some improvement, but that's all they'll do. OTOH if you do plan on making even moderate changes to the bike, need spark-advance or AFR changes outside the functionality of the O2 sensors, etc. you'll need a real tuner. I'm not besmirching their usefulness to some riders, as IMO they do have a niche in the marketplace.
Outstanding HDF Member
Joined: Aug 2011
Posts: 2,095
Likes: 11
From: Central Illinois
IED's and their variants are basically resistors that alter the voltage from the O2 sensor and fool the ECM into thinking the AFR is leaner than it really is, thereby prompting it to add more fuel to the mix. They only work in closed-loop mode, which is to say from idle to about 80KPA (~50% throttle), and are non-functional above that point in open-loop. Thus, WOT is unaffected by their presence. Some of these claim to allow changes down to 13.8:1 in closed-loop, but this is outside the functionality of stock NB sensors and may throw a trouble code reflecting that condition.
If you want a bit more cooling and throttle response in the cruise range and plan on keeping the bike near stock, these can provide some improvement, but that's all they'll do. OTOH if you do plan on making even moderate changes to the bike, need spark-advance or AFR changes outside the functionality of the O2 sensors, etc. you'll need a real tuner.
If you want a bit more cooling and throttle response in the cruise range and plan on keeping the bike near stock, these can provide some improvement, but that's all they'll do. OTOH if you do plan on making even moderate changes to the bike, need spark-advance or AFR changes outside the functionality of the O2 sensors, etc. you'll need a real tuner.
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