[Dayze]

I found a pretty good snapshot of exactly what they do:


The XiED family of products do not mangle or change anything indiscriminately. Nor do they override or overwrite any functions of the ECM.

What they do is alter the signal from the O2 sensor, BEFORE it gets to the ECM.

The XiED altered signal arrives at the ECM telling the ECM that the bike is "leaner" than it really is (by 6-8%).

From that point forward the ECM functions exactly as it was designed to function, taking all factors into consideration (not just the altered O2 input).

The ECM monitors all the following just the same with or without the XiED product installed. It makes adjustments based on all of these.

RPM
Manifold Pressure (to account for humidity and elevation)
Intake air temperature
Engine Temperature
Throttle position
Vehicle Speed
Ion Sensing (to reerun timing if detonation occurs)
and more.
None of these functions are affected by the XiED.

With an XiED the ECM is told the bike is running 6-8% leaner in closed loop than it actually is. The ECM then makes a precise adjustment based on that altered input, causing the bike to run precisely richer by 6-8%, while still factoring in all normal ECM variables.

Regarding your discovery...yes, we sell them, it is right in the banner at the bottom of all my posts.

Every time I post about XiED's and tuners, and whenever I speak with someone, I always mention that a full tuner will give a better tune than an XiED product.

On a stock-Stage 1 bike you can get about 90% of everything available with an XiED product, but if you want or need that last 10%, then a full tuner is the way to go.

Different people have different priorities.

I have two bikes currently. One (a sporty) has a Stage 1 and has the X14iED on it, and I am completely happy with it. Could I get a little more out of it by spending another $200-$300? Yep, but I do not feel the need.

On my Twin Cam, with a Stage 1, that is used for heavy 2-up touring, I want to get every last bit I can out of it, so I use a PCV with my own map. On this bike, for what I use it for, it is worth it for me to have spent an extra few hundred dollars AND to have spent about 20 hours getting the map just right.