I had my Dyno Tune done with the SERT.&nbsp\\;\\\\\\; My results are posted below.&nbsp\\;\\\\\\; It has been a few weeks since I had it done.&nbsp\\;\\\\\\; My problem is that it seems to be popping more now than before the Dyno Tune.&nbsp\\;\\\\\\; From what I have been told and what I read here the popping would be eliminated with the Dyno Tune.&nbsp\\;\\\\\\;
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I have been thinking that it might clear up or maybe it was normal.&nbsp\\;\\\\\\; But then yesterday I went for a ride into the mountains.&nbsp\\;\\\\\\; Once I got up in elevation the popping went away.&nbsp\\;\\\\\\; But then it came back when I went back down in elevation.
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Any Ideas????&nbsp\\;\\\\\\; I am going to take it back to the shop but I wanted to see if anyone had any ideas first.&nbsp\\;\\\\\\; Thanks guys.



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You should post this in the Electrical/Ignition/Tuner section and hopefully Doc, the Dyno guru, would answer.
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Assuming you are referring to popping when de-accelerating or between shifts, it sounds like you have a lean air/fuel ratio mixture at 0 and maybe 2 percent throttle positions. Case in point, when you went up in elevation, the air gets thinner and AFR get richer and decel popping went away. I had the same problem and increased the VE tables by several increments from 1500 to 6000 rpms for both the 0 and 2 percent throttle positions. This makes the ECM think the Volumetric Efficiency in this range is greater, ie, more efficient, and thus the ECM adds more fuel to maintain the AFR, which in effect richens the AFR mixture.

 

Yes the problem is when I left off of the throttle....
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I figured it was running lean too.... but when they did the Dyno Tune they made the mixture richer....&nbsp\\; Now the popping is worse.&nbsp\\; So that made me think that may not be the issue.&nbsp\\; Does that make any sense?

 

so fatit up and see what happens is it carb or efi/////efi sucks more fuel more air more power

[IMG]local://upfiles/55565/77A484553CAE4103A558550157CCA021.jpg[/IMG]

[IMG]local://upfiles/55565/87764D3A5AFA499D8AA10EB5E0ABFA53.jpg[/IMG]

 

It is a 2008 with EFI.....

 

The A/F ratio on your dyno sheet looks good, you may just need some tweeks at certain throttle positions.&nbsp\\; Your dyno guy should make the adjustments for you, no problem.&nbsp\\; Sometimes tuning is a process, not an exact science.

 

Quote:

I figured it was running lean too.... but when they did the Dyno Tune they made the mixture richer

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Yes, you're right that a Dyno tune typically on newer bikes will always decrease the AFR, or conversely, add fuel. Looking at your fuel curve the tuner set the AFR at the typical 13.8 ratio, but notice that the curve(s) don't get to 13.8 until after 2700 rpms. So I think, typical of tuners, he focused on max power and torque and ignored ride-ability. He did achieve a nice value torque by the way. I'd contact the tuner and tell him he's got more work to do. Getting rid of the decel pop will not reduce your HP or TQ.

 

Not sure?? do you have just the HD download, or do you have sert, or v/h fuel pack? powercommander??
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I was thinking of doing just the download, and my dealer recommended going with the other top 3. But as mentioned a tweek on the dyno may all you need.
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