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Old 02-18-2012, 12:00 PM   #1
DungeonWorks
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Cobra Fi2000 Powrpro Tuner

Anyone have any reviews or feedback on this item? I know the Yamaha and M109R forums have loads of guys running it (found by Googling), but I am surprised there is not a lot of feedback from V-Rod riders here on the forum.

To you guys that have it....was it worth it and does it do what they claim it does?
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Old 02-18-2012, 03:04 PM   #2
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If you use the search function above for "Fi2000"...you'l find mostly negative reviews by forum member fuel mgmt experts...
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Old 02-18-2012, 04:10 PM   #3
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Thanks Elusive1, done that first on several tries and variations for the Cobra Fi2000 Powrpro Tuner (I been around here awhile ). I have only found Lane's review on his 2010 StreetGlide. I just searched again using "Fi2000" and nothing new come up. Can you point me to actual threads with people's review by chance?
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Old 02-18-2012, 04:26 PM   #4
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Only tunes to 12.5 AFR
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Old 02-18-2012, 04:32 PM   #5
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Only tunes to 12.5 AFR
So that's the special ingredient in the sauce, auto tune everything to 12.5? Talk about buzz kill. That kind of makes Cobra flirt with false advertising when they say it doesn't tune to an arbitrary AFR doesn't it? Guess I'll be going Power Vision or Mastertune....
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Old 02-23-2012, 10:25 AM   #6
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Simplified answer: Cobra claims it tunes by measuring increase in crank speed by comparing each revolution to the one prior. It only works during acceleration.

All the anecdotal evidence suggests it works. I've never seen a dyno sheet from a bike running one.
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Old 02-23-2012, 11:28 AM   #7
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lane had his dynoed, and claimed it pull the same hp and tq every single time.
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Old 02-23-2012, 07:06 PM   #8
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We ran Lanes stock street glide back to back with and without the tuner.

11HP difference

The only way to do this is to rich-in up the stock motor.
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Old 02-23-2012, 08:31 PM   #9
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We ran Lanes stock street glide back to back with and without the tuner.

11HP difference

The only way to do this is to rich-in up the stock motor.
The cobra did exact identical #'s both pulls on HP/TQ.

I will say the cobra is as butter smooth street riding I've ever seen.
I went as far as dropping down to 25 mph in 6th gear which is below 1500 rpm if I remember correctly and twisted the wick and it picked up speed very well under that kind of load without pinging etc.
I dont advise doing this but I wanted to see what it would do.
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Old 02-23-2012, 08:59 PM   #10
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We ran Lanes stock street glide back to back with and without the tuner.

11HP difference

The only way to do this is to rich-in up the stock motor.
...and it does this by keeping a constant 12.5 AFR in all throttle and RPM ranges? For example, would it be the same as taking a Race Tuner map and putting 12.5 in every cell? I know what claims on this device are, just not sure what it is doing or how it is doing it.
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Old 02-24-2012, 06:45 AM   #11
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I have tried what lane said in his post on his bike. It did just what he said above.

When I talked to the guy hw said that is tunes to 12.5 across the board.

Would not go into much details about it.
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Old 02-24-2012, 07:01 AM   #12
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I have a friend who owns a motorcycle store and recently told me not to buy the powerpro auto tuner, to many recalls.
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Old 02-24-2012, 08:24 AM   #13
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Well then it works or it doesn't?!?!?! Or are you talking about two different tuners?
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Old 02-24-2012, 10:26 AM   #14
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Quote:
Originally Posted by DungeonWorks View Post
...and it does this by keeping a constant 12.5 AFR in all throttle and RPM ranges? For example, would it be the same as taking a Race Tuner map and putting 12.5 in every cell? I know what claims on this device are, just not sure what it is doing or how it is doing it.
The power pro can't tune to any AFR, it has no O2 sensors. On the cobra site, they say the device alters fuel delivery and looks for an increase in crank speed from one revolution to the next. It always tunes for maximum power.
All that comes from the cobra site, I can't verify the information, and have never used the device.
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Old 02-25-2012, 11:02 AM   #15
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Crank speed tells you NOTHING about air temperature, density, octane, etc... That's a very poor way to run a bike. It's basically saying, depending on engine speed, open up the injector pulswidths at the same ratio that the engine is accelerating. There's so many other factors that alter an air/fuel ratio.

The ONLY way to properly set an AFR is to mock your fuel map against a wideband and make sure the numbers match up. Without a wideband you're shooting in the dark.
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