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Sport Touring Rider
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Discussion Starter #1 (Edited)
Just ran the FZ on the dyno for the first time with the Leo Vince exhaust.

Here's the setup: 2006 Yamaha FZ6 with Leo Vince exhaust with cat eliminator, db killers out.

Previous run totally stock 89.10hp
Today's runs:

Run 1 (stock tune) - 93.20hp

Run 2 (+4 C1 and C2) - 93.82hp

Run 3 (+9 C1 and C2) - 94.77hp

Run 4 (+14 C1 and C2) - 95.11hp

Run 5 (+19 C1 and C2) - 95.60hp

Run 6 (+24 C1 and C2) - 95.79hp

Run 7 (+29 C1 and C2) - 95.68


so there it is. Leo Vince with stock tune will give you 4hp but there is extra power to be had by using your CO adjustment.

Overall, I ended up with a 7hp gain with only exhaust added. I am still running a stock airbox and filter. The bike has 4200 miles.
 

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Good, more numbers,, now lets get the "butt" Dyno impression, ya know does if feel faster, like when you get new sneakers on your feet and you can run faster?
 

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Sport Touring Rider
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Discussion Starter #4
But on the dyno runs, how was the fuel ratios? Did it stay flat even with those adjustments?

Khyren
yup very flat. yamaha really knows what they are doing with fuel injection. it adjusts to different factors and keeps everything in line very well. i need to scan these sheets i guess.
 

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Sport Touring Rider
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Discussion Starter #5
Good, more numbers,, now lets get the "butt" Dyno impression, ya know does if feel faster, like when you get new sneakers on your feet and you can run faster?
Put over a hundred miles on the bike last night and the butt dyno says it wants to wheelie more... but I prefer both wheels on the ground thank you!

:fiddy
 

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Good, I wanted to know if it was noticeable or not, Think it will effect fuel mileage? not that it is a big issue. In addition, would an air box mod increase in hp as well?
 

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After all this time, at last!!!!

Thanks for manifesting that the CO adjustments really do effect the bike's running condition as opposed to just being an emission at idle adjustment.

Now, if we can only measure the emissions and compare data as you change the values...:eatpop
 

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well, if he scans the sheets that have the fuel charts on them and compare the last to the stock settings, we can see if there is a huge fuel dump or not...

Khyren
 

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Training wheels
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yeah yeah, scan and post runs!

Good work brudda
 

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Sport Touring Rider
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Discussion Starter #11 (Edited)
Jim, you wont hurt anything if you bump up the CO by 10-15 points. you can see how many i did to get the gains i saw. if you still have a cat, likely 15 points would be as high as you would need. maybe less. it really is hard to say without a dyno.

thanks Robbo and khyren. i will be back in the shop tomorrow and will try to remember to bring home my printouts to scan.

b.t.w. i am getting about 180 miles to a tank with this setup. filled today and squeezed in just under four gallons. not too shabby.

edit: that 180 mile tank was 87 octane. i am now running 91 to see if there is any difference.
 

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Ok. I have to be the one to ask. Do we need any fancy equipment to do the CO adjustment or can it simply be done in the diagnostic mode or what?
 

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Sport Touring Rider
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Discussion Starter #13
Ok. I have to be the one to ask. Do we need any fancy equipment to do the CO adjustment or can it simply be done in the diagnostic mode or what?
you wouldnt have to use any special equipment to adjust the CO but in order to tune for power you would need a dyno with a sniffer.
 

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Miles from there
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So, if the CO adjustments were lowered, would that increase fuel mileage?
 

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how do u do the adjustment?
 

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Sport Touring Rider
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Discussion Starter #16
So, if the CO adjustments were lowered, would that increase fuel mileage?
well, yes to a point but that would be causing your engine to run leaner than stock. the results would likely be at most 5mpg increased but the increased heat would likely negate that too. not to mention decreased life of the engine and oil.

my fuel mileage has not suffered at all, and if any change, has improved slightly.
 

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Miles from there
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well, yes to a point but that would be causing your engine to run leaner than stock. the results would likely be at most 5mpg increased but the increased heat would likely negate that too. not to mention decreased life of the engine and oil.

my fuel mileage has not suffered at all, and if any change, has improved slightly.
I would imagine that the range of adjustment is between two acceptable limits set by the factory, I would be surprised if you went either way to the limits of adjustment that it would harm anything, and still be within factory specs. Sound reasonable?
 

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Sport Touring Rider
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Discussion Starter #19
I would imagine that the range of adjustment is between two acceptable limits set by the factory, I would be surprised if you went either way to the limits of adjustment that it would harm anything, and still be within factory specs. Sound reasonable?
going off of the minute a/f changes each run, i would agree
 
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