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Discussion Starter #1
So, I'm doing a stage 1, Rush 4" "Big Louies", with 2.5 inch baffles, and aftermarket A/C. I have read a ton of stuff about how this will lean out the air fuel mixture and could lead to ride-ability issues. I have read about the Xied in line enrichment devices from night rider performance as well as the Dobeck EJK tuners, to compensate for the added air flow. I contacted the folks at Dragos to get an expert opinion from a reputable engine builder and was told that nothing is needed for a stage 1 such as mine, that the stock ECM would compensate adequately and that any fuel enrichment device would only result in additional fuel use, lower mileage and increased catalytic converter heat. This sounded counter-intuitive from everything I've read on this forum, so I thought I'd throw it out there; Anybody care to comment with their experiences. BTW, I'm really leaning towards the Dobeck EJK as I'm not looking to do any further engine mods for at least 5 more years. Their website has some really good links to information of the effects to catalytic converters due to fuel/air mixture changes.
 

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Lean creates additional heat which is not a good thing. Your ECM can only do so much - and unless you go with a tuner you will always run on the lean side. IMO you should go with a tuner. There are differences in tuners. Some are non EPA compliant (allows for enrichment above EPA requirements) and others are EPA compliant. I would not utilize Xied's or a EPA compliant Tuner. As for less mpg? I run a PCV (non EPA compliant) with AFR's richer than the stock ECM and I average 45 mpg.
 

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Discussion Starter #3
Lean creates additional heat which is not a good thing. Your ECM can only do so much - and unless you go with a tuner you will always run on the lean side. IMO you should go with a tuner. There are differences in tuners. Some are non EPA compliant (allows for enrichment above EPA requirements) and others are EPA compliant. I would not utilize Xied's or a EPA compliant Tuner. As for less mpg? I run a PCV (non EPA compliant) with AFR's richer than the stock ECM and I average 45 mpg.
your rational for not using the Xied's? I understand the EPA compliant tuner as nothing that is compliant is going to violate EPA standards, but why the hate on the Xied's?
 

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So, I'm doing a stage 1, Rush 4" "Big Louies", with 2.5 inch baffles, and aftermarket A/C. I have read a ton of stuff about how this will lean out the air fuel mixture and could lead to ride-ability issues. I have read about the Xied in line enrichment devices from night rider performance as well as the Dobeck EJK tuners, to compensate for the added air flow. I contacted the folks at Dragos to get an expert opinion from a reputable engine builder and was told that nothing is needed for a stage 1 such as mine, that the stock ECM would compensate adequately and that any fuel enrichment device would only result in additional fuel use, lower mileage and increased catalytic converter heat. This sounded counter-intuitive from everything I've read on this forum, so I thought I'd throw it out there; Anybody care to comment with their experiences. BTW, I'm really leaning towards the Dobeck EJK as I'm not looking to do any further engine mods for at least 5 more years. Their website has some really good links to information of the effects to catalytic converters due to fuel/air mixture changes.
I think with all the testing Drago does , they know what they're talking about. On the other hand I believe a little richer is better than a little leaner. Not sure about any damage to the Cats , but like any thing, the more they work the less they last.
I run a similar set up as you with a decated head pipe and use the FLxvied-10 . My mpg is in the mid 40s and the bike runs strong. All the xvied's do is trick the ecm into running a little richer . Its no where as good as a tunner , but not near as complicated or expensive.
 

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your rational for not using the Xied's? I understand the EPA compliant tuner as nothing that is compliant is going to violate EPA standards, but why the hate on the Xied's?
No hate here. Had them, used them and sold them. Just not the solution for me. Worked with stage 1 AC and after market pipes. Not an option for further power mods, and desire to change the AFR across all RPM and throttle ranges (open and closed loop).
 

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Discussion Starter #6
No hate here. Had them, used them and sold them. Just not the solution for me.
I can dig that. My questions though are 1. did they fit the need at the time? Did they perform as advertised?

I also think I'm gonna pass on them and go with the Dobeck EJK controller. The science sounds plausible and the fact that these are the guys that founded Dynojet speaks volumes.
 

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I can dig that. My questions though are 1. did they fit the need at the time? Did they perform as advertised?

I also think I'm gonna pass on them and go with the Dobeck EJK controller. The science sounds plausible and the fact that these are the guys that founded Dynojet speaks volumes.
Yep as far as I could tell they worked as advertised. The only thing I did not care for, and it may be simply related to my bike model year, was they did throw codes - which per the web page I just cleared and ignored (give night rider credit for disclosure on this). I sold mine when I added cams. They are simple to install and remove.
 

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Yep as far as I could tell they worked as advertised. The only thing I did not care for, and it may be simply related to my bike model year, was they did throw codes - which per the web page I just cleared and ignored (give night rider credit for disclosure on this). I sold mine when I added cams. They are simple to install and remove.
No codes thrown on my 2010
 
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