Got a chance to evaluate my newly-installed Cobra Fi2000r fuel controller, under full-spectrum, real-world conditions today. I was going to do it yesterday, but I only made it to the end of the block; it was 37º out there! Today, it warmed-up to the low 40's so I went for it. My observations, are as follows:
First, it came from the factory with the pots set at 1, 2, and 0 (left-to-right), corresponding to 1 for the low-speed, 2 for the mid-range, and 0 for the "main Jet" or high-end. "0" means that no fuel is being added to the baseline ECU map for that particular sector. I arbitrarily reset the 0 high-end to 1, based on nothing more than the fact that I'm running a gutted muffler. Ambient conditions were 4800 feet of altitude and 42º F. I have 1100+ miles on the bike, so she's still a little tight, though I can feel her loosening-up perceptively these last few times out of the barn.
It now starts immediately and doesn't require the more usual 2-or-3 stabs at the starter button before it stays lit, and it now goes immediately to a "high-idle" condition, where it stays, at a smooth, steady RPM for 2-to-3 minutes before it starts dropping off (as it warms up), ending up at a smooth, steady low-rpm lope. Prior to now, it would start and then go into a surging, up-and-down mode for several minutes before finally settling into a steady idle. Nice! Whacking the throttle, in neutral, to WFO from an idle, now begets an instant, no-lag response, whereas there was a noticeable hesitation before. OK, now for the open road.
After "putting" out of my neighborhood, to avoid triggering the rath and ire of my neighbors, I got onto the country road that borders my area and I whacked it: WOW! What a difference! The improvement in acceleration is very noticeable, all the way up to 70 and 80 MPH (I won't take it much beyond 80 'til I get a some more miles on it). Rolling-on in top gear from ~60 to ~80 doesn't "feel" much different than before, but my (by then) half-frozen, un-calibrated ass dyno is going to need a few more runs to decide whether or not there is any improvement in the top-end. I might have inadvertently richened it up too much by resetting the controller high-end from 0 to 1 (maybe the factory had it right to begin with?). Time and more fiddling with it will tell.
In summary then, based strictly on this one, 20-mile, seat-of-my-pants feed-back road test, I'm impressed. I'll have to wait 'til my Air/Fuel Ratio analyzer gets here to fine-tune the controller, and I probably won't do that 'til I get the new induction system bolted on. For now, the addition of the fuel controller seems like it was a good idea.