Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[bdas2]

Just got my bike back from dyno though I'd post it to get some feed back.  My 09 ultra eagle has original pipes with the cat removed. It also has K&N air flow filter, and fullsack baffles.  Can someone tell me how to read this graph, I know the end result but not all the stuff.   Thanks

[aka_Matt]

1st, he didn't put the HP and TQ on the same scale, so its hard to read... but it looks like ur making 100TQ from about 2500, and now that i'm on this page, i can't go back and look at anything else... just look at it and remember that the TQ # is on the right side of the chart and the HP # is on the left side... the curve that rises faster is the TQ, and the one that curves up slower and peaks around 5000-5500 is the HP...

[bdas2]

thank for the info.  On the bottom graph is a s ???traight line supposed to show equal amounts of air and fuel or am i missing something ?

[grc]

thank for the info.  On the bottom graph is a s ???traight line supposed to show equal amounts of air and fuel or am i missing something ?

The dotted line on your chart, which is the target air-fuel ratio as set by the dyno operator, appears to be set at a 13 to 1 ratio.  The solid lines represent actual measured AFR's, before and after the tune.  Ideally you would want the after line to follow the target line pretty closely.


Jerry

[RCFlyer]

He also ran a before tune and after tune. The blue lines are before and the red is after he tuned it. It looks like you started out with 83.59 HP and 99.88 torque. After tuning you have 87.42 HP and 103.84 torque. It looks like you AFR was on the rich side and he leaned it up close to the 13 that he selected. I hope that helps.

[Unbalanced]

WOT is pretty easy to tune and based on the graph provided I would be concerned that the guy didnt do all that he could do on your job especially since the dyno sheet has been shrunk.  At the tail end of the run you should be getting RICHER not LEANER and while in your power band there is a pretty good spike to the lean side.   Your numbers are ok, but the dynosheet air/fuel is not a great representation of his work and letting you go out the door.   Maybe Doc1 will comment as well.

[HD Street Performance]

16 runs

[Godeater]

As a dynojet operater/tech I would guess that they where manually tuning your bike rather then using Tuning Link, which the pc does the mapping and the tech just holds the throttle position where needed and watches for issues.  Tuning Link is pretty dam accurate so I would agree with Unbalanced.  Sure goes all over the place as far as a/f mix at the tail end.  And the shrunk the a/f graph to make it look closer.  Also the conditions changed a lot base run to final run which scews things some too.  Its also strange to me that the bike is so rich to start unless thats a base map they loaded just to start with.  99% of the bikes I do are 180 the opposite, lean lean lean.  Just my 2 cents.

[bdas2]

thanks for all the input I am going back to talk with them now

[lonewolf55]

How do you even know that is your chart? Documentation in the run notes are non existant. It should not be Runfile.001, it should be your name.001. The run notes should show the last 6 numbers of your vin, mileage, tuning device, etc. I have to agree that you afr line should not be getting leaner as rpms increase. Not forcing the scaling on the HP/TQ chart is a no no. The bike is definately not happy below 3000 rpm as the lines should be smooth. My biggest concern is why does the run start at 1600 rpm? Wacking the throttle that low is not something I would do. Maybe thats why the "tuners" name is not on the sheet. If it is that bad at wot how well is it tuned where you actually ride the bike? Unfortuately tuning with devices such as Tuning link, Vtune or Smartune the amount of run files is not an indicator of how much time was spent tuning. If your bike has a PCV, an hour and twenty six minutes even with the Tuning link, is not a whole lot of time.

[HILLSIDECYCLE.COM]

16 runs

I can't tune a unknown carb combination in 16 pulls.
Remember that the first 3 are to stabilize it. That leaves only 13 to do it.
Maybe he knows something we don't.
Scott