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[jimp]

I don't understand why people dyno Harley's, mine runs fine with the combo I have and I can feel the seat of the pants performance gain.

[Twolanerider]

I don't understand why people dyno Harley's, mine runs fine with the combo I have and I can feel the seat of the pants performance gain.

Baseline to look at against future tinkering, diagnostic reasons, just simple curiousity; any or all the above.  Don't have to, just want to.  That in and of itself is a good enough reason  [smiley=beerchug.gif]

[hd2003-se2005]

Compare the dyno results with your checking account statement!

You check to see what's in your account before you use it.

I like to know what's in my H/P and Torque account before I use it.

The knowledge of what you have available is a powerful thing. The knowledge of what you don't have is just as important.  It's all in how you use the information available!

[smiley=xyxthumbs.gif]

[shovelhead71]

dyno gives you the tool like any other tool to use that tool precicesly to give you the most performance tuning for whatever setup you have - its the "fine tuning" adjustment that is critical - if that is what you are seeking.
likewise - it gives you the braggging sheet to show others that your set up kicks a-- amoungst those that suck on horsepower and think that they have horsepower - just cause them ole pipes are loud - does not mean it has horsepower and torque that is reaching the rear tire to rip your hands off the handlebars when you twist the throttle - or if your married and your wife rides with you - to catapult her up and over the passenger backrest  [smiley=laugh.gif]

[JCZ]

And one of those tools.......the A/F numbers.  You make any kind of change to your ride from it's stock configuration you don't know what your A/F is without the dyno graph.

The dyno also tells you where, in the powerband, your power or torque is coming on and where it's dropping off.  If you're looking for low end torque (most of us are looking for that with a heavy bike), how are you going to know if you have it coming on at 2,800 or at 3,200 by "seat of the pants"?

Study dyno sheets and ask a lot of questions (just like this one) and you'll learn a lot more about your bike than you do now.

Let me use HD Dude's bike as an example.  He has the Freedom Package, the same as many others on this site.  He got good performance out of it.  But finally decided to ride to Freedom Cycles in Reno to have them "dyno tune" it.  They squeezed out a few more horsepower and a few more ft. lbs of torque.......that's why you dyno tune......to get all that you're paying for.

By the way.......a good question for somebody who doesn't know and you asked it on the right web site (get good, clean, honest answers here).

[hd-dude]

And one of those tools.......the A/F numbers.  You make any kind of change to your ride from it's stock configuration you don't know what your A/F is without the dyno graph.

The dyno also tells you where, in the powerband, your power or torque is coming on and where it's dropping off.  If you're looking for low end torque (most of us are looking for that with a heavy bike), how are you going to know if you have it coming on at 2,800 or at 3,200 by "seat of the pants"?

Study dyno sheets and ask a lot of questions (just like this one) and you'll learn a lot more about your bike than you do now.

Let me use HD Dude's bike as an example.  He has the Freedom Package, the same as many others on this site.  He got good performance out of it.  But finally decided to ride to Freedom Cycles in Reno to have them "dyno tune" it.  They squeezed out a few more horsepower and a few more ft. lbs of torque.......that's why you dyno tune......to get all that you're paying for.

By the way.......a good question for somebody who doesn't know and you asked it on the right web site (get good, clean, honest answers here).

Since JC used me as an example i'll add my 2 cents...The map that was sent with my bike was the latest and greatest that Freedom had at the time. Every bike is different. There are many many factors that can change the way an engine performs. Even though they are all suppost to be built to the same specs. In my case not only did they get a few more HP and TQ they also got rid of the occasionall pop that I had on decell. Another case is Monorats SEEG, he also has the freedom setup and they got 106 HP from his.

With all of the complex systems on these bikes I would always get them tuned. Its the only way to be sure its running at its full potential. [smiley=thumbsup.gif]

[DCFIREMANN]

I don't understand why people dyno Harley's, mine runs fine with the combo I have and I can feel the seat of the pants performance gain.

JIMP when you do the basic upgrades you can always feel the seat of the pants gain(unless you have a problem) When you get into major upgrades that is when the dyno really comes into play. Believe it or not the local dealer can do some major changes like cams ,heads, carb or throttle body and exhaust with the download for the fuelies and may pickup as much as 10 to 20 HP just by dialing in the bike. Once this is done you really feel the seat of the pants difference.


BE SAFE

THE DAWG

[monorat]

And as Hd-dude said all bikes are different and its nice to have a base line. I'm going to let Freedom dyno it everytime its serviced. Just to see where its at, where its been and where I can take it next. And I know hd-dude I still need to post the dyno sheet  [smiley=nixweiss.gif] but here, or under Freedom or dyno ?

Enjoy the sun  [smiley=7.gif]

[JCZ]

And as Hd-dude said all bikes are different and its nice to have a base line. I'm going to let Freedom dyno it everytime its serviced. Just to see where its at, where its been and where I can take it next. And I know hd-dude I still need to post the dyno sheet  [smiley=nixweiss.gif] but here, or under Freedom or dyno ?

Enjoy the sun  [smiley=7.gif]

In the Dyno Thread......just for quick reference to all the others.

[MAVERICK]

What you see is what you get. Where I work we dyno are jet engines when they come off new assembly and full engine rebuilds. This allows the engineers in the test facility to collect specific baseline data of that engine. This information can be used for various reasons depending on who needs. When customers pay up to 5 million for a new engine they usually request documentation or certafication showing that the engine meets certain performance specs. After a rebuild engines are started up and run in to make sure that the engine runs and what ever parts  that were replaced or areas of the engine that were worked on function properly.

The only reason I have had my motorcycles dynoed was to see how any performance upgrades that were done to the engine affected the horsepower and torque. On fuel injection bikes its a tool used to map the fuel and ignition system for maximum efficency.  

[the O`Fender]

what I found with dynoing was some very inexpensive HP & Torque (6 more HP, 9 more FPT)
I paid $300 for the tuning that's $50 per HP or $33 per FPT [smiley=xyxthumbs.gif]

and the motor is smoother running in all RPM ranges