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Discussion Starter · #1 · (Edited)
All;

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.

Cheers
 

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Discussion Starter · #2 ·
Great feedback on the Cobra Fi2000r fuel controller :eek: made me shiver !!! Can you post some info on the A/F analyzer ? Some folks round these parts are thinking 'bout one themselves :D.
Your wish, Exalted One, is my command!

Inquire within:

RSR Air/Fuel Ratio Gauge

Cheers
 
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Discussion Starter · #3 · (Edited)
BarFly, one or two O2 sensors ??? and where ya gonna put 'em ???
Still to be determined, Gar, though RB Racing seems to think that monitoring both is redundant, at least on Harleys, and they routinely monitor just the front cylinder, reasoning that the rear cylinder runs warmer and leaner, and therefore requires less fuel (seems like inverted logic, doesn't it). Either way, you can order a single input/read-out gauge, or a double input/read-out unit, apparently for the same price. At any rate, I'll TIG the O2 sensor bung/s into the lower side of the header/s (out of sight) approximately 1-1/2 to 2 inches out from the exhaust port, or as reasonably close to the port as possible, to preclude any reversion effect from skewing an accurate sampling. Also, since I plan to use this device just to get the fuel controller zeroed-in, it will be clamped to the h-bar only as long a it takes to optimally tweak the pots. I mean, once you've got it dialed in, unless you make subsequent changes to the exhaust or intake systems, the analyzer becomes redundant and you might as well unhook it, unscrew the O2 sensor and plug-off the bung. Besides, you (I) don't want that big ole clunky gauge clamped permanently on my otherwise naked, sexy chopper. LOL!. Remember, it's all about takin' shit off, not puttin' more shit on (IMNSHO).

For those who would ask, "Why doesn't he simply strap it to the dyno?", I'll offer three reasons (rationalizations?):

1. The closest dyno is 40 miles away, and when i recently spoke with the operator, he didn't impress me as being that competent.

2. A dyno, in the hands of a less-than-competent operator has an oft-demonstrated propensity for eating engines. Just ask me, I was once a less-than-competent operator. Even a brief inadvertent excursion into the realm of 1500-to-1600 degree EGT's can hole a piston so quick it'll shock you. Dyno's, improperly operated, impose violent loads on an engine.

3. I like to have personal hands-on control of the tuning process. Done carefully and systematically, you'll learn a lot about the idiosyncrasies of your engine and its systems. In the tuning process, the gross changes go quickly, but the finer tweaking can be a long, drawn-out, repetitive process; extended dyno time gets expensive.

Cheers
 
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i spoke with mike at cobra because i had a flat spot in higher ranges.everything else was good.he told me to bump the red pot up 1/2 click at a time and see what it does.my pots are now 2 4 7 and smokeing.keep the rubber on ground.
 

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Discussion Starter · #5 ·
i spoke with mile at cobra because i had a flat spot in higher ranges.everything else was good.he told me to bump the red pot up 1/2 click at a time and see what it does.my pots are now 2 4 7 and smokeing.keep the rubber on ground.
Good information 460brevill. I'll have to try bumping mine. What pipes and intake are you runnin'?

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2-4-7 ? Wow...how's your gas mileage now? I've got my pots at 3-4-0 I think, and my gas mileage has suffered pretty bad. One tank I got just 75 miles out of before the reserve came on, and even all highway cruising I only get 100. I'm running the cobra pipes as well...waiting on the S&S cleaner to get here...
 

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Discussion Starter · #7 ·
2-4-7 ? Wow...how's your gas mileage now? I've got my pots at 3-4-0 I think, and my gas mileage has suffered pretty bad. One tank I got just 75 miles out of before the reserve came on, and even all highway cruising I only get 100. I'm running the cobra pipes as well...waiting on the S&S cleaner to get here...
Aaaaah; you've discovered the truth of the old axiom, "There ain't no free rides". You want better performance from the Low, Mid, and High end portions of your powerband, you're gonna' pay for it in cubic volumes of fuel consumed.

I'm afraid to even check my mileage since I gutted my muffler and mounted my fuel controller. LOL

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Well I just got the S&S filter in last night...Looks amazing by the way...very high quality. Hopefully get it installed this week and i'll re-evaluate my pot setting and let you guys know how she runs.

Oh and I'm not that concerned with gas mileage...but isn't there a point where you would be giving it TOO much fuel?? I'm new at a lot of this so I'm asking??
 

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when she starts blowing black its to much.keep the rubber on the ground.
 

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I have seen numbers all over the board on this one. I am running at 8-9-7 which is high, but the bike runs better than it did at 7-8-6. Next summer I may try running it at some of the lower numbers I see. My thought has been that if the bike is running good, why fool with it.

Using stock intake, Cobra swepts and baffles removed.
 

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Discussion Starter · #12 ·
I have seen numbers all over the board on this one. I am running at 8-9-7 which is high, but the bike runs better than it did at 7-8-6. Next summer I may try running it at some of the lower numbers I see. My thought has been that if the bike is running good, why fool with it.

Using stock intake, Cobra swepts and baffles removed.
God, those numbers sound WAY the hell high, Richard1. I would think you'd be blowing black smoke and loading the plugs with those settings. Obviously not, huh? I'm thinking 'bout raising my top setting by 1 point (currently 1-2-1), just to see if I can improve the top-end, but 8-9-7 seems radical. I really do need to get an Air/Fuel Ratio Analyzer mounted-up. Then I'll have some definitive answers.

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I’m no expert on any of this. My settings were done by the dealer. The bike runs pretty darn good. I would be curious to know why the numbers are all over the board. Someone that really knows what their talking about, please weigh in on this subject. I would think we should all be pretty close. The numbers make it sound big, but in reality, maybe it is not that huge of difference with the controller.
 

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Well I got my S&S filter installed last night..(very easy to install by the way), but unfortunately on the way home I was riding in rain and snow so i didn't get to test any performance increases. The bike did seem to burble a little more on decel, so maybe I need to raise my pot settings a little now that i've got more air flow? I'll have to wait until the weather clears up. I agree that it seems like our settings on the FI2000 should be similar. Kinda makes me want to bite the bullet and get the PC5. The S&S looks great though!!! Oh, and don't think that the S&S should make the bike any louder, but I set off my first car alarm last night! I was soo proud!! lol Happy riding!
 

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If your bike is running fine, I see no reason to go to the PCV. What are you accomplishing? :)
 

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897

I have seen numbers all over the board on this one. I am running at 8-9-7 which is high, but the bike runs better than it did at 7-8-6. Next summer I may try running it at some of the lower numbers I see. My thought has been that if the bike is running good, why fool with it.

Using stock intake, Cobra swepts and baffles removed.
richard
897 is going to start killing plugs and possibly wash the pistons.be careful.
 

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Discussion Starter · #17 ·

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My dealer installed my pipes, Fi2000 and set it up. It seemed a little sluggish in the first couple of gears so I took it back. They bumped each pot by 1. They seem pretty confident and the bike runs great. Therefore I have not really questioned it. My bike is still at the dealer waiting on some parts; I suppose I could bring it up to them and see what they say. They will probably stand behind what they did and say it is fine.
 

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richard
897 is going to start killing plugs and possibly wash the pistons.be careful.

Brevill, I was at the dealer this evening and asked the service manager about it. He said the high setting would not hurt anything. It's not like riding around with the choke out.

Next spring I will fiddle with it. I think the factory settings are 1-2-0 or something? 15 degrees here and I aint goin out.
 

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I think i'm going to have to adjust my pots now that I have the S&S cleaner on. Just running the fi2000 and cobra swepts I got the occasional sputter on decel, but the S&S has made it worse. I'm assuming I need to bump up the pots, but which one? I'm considering taking it to a dyno shop and let them figure it all out...
 
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