| Author | Message | ||
     Trbulnt |
Entered the bike in its first show today and they had a free dyno for the motorcycles. It gave horsepower only which was good enough for the free price! The results for my '10 1125R with just an Erik Buell Racing ECM made 118 horsepower at the wheel. Another 1125R dynoed as well and he had a stock ECM with a Drummer exhaust and he made 119 horsepower at the wheel. My bike also took 2nd place in the American bikes category. There were about 10 other bikes in my class. Overall had fun at my first event I ever entered. Now I just need an exhaust! | ||
| Buellitup |
Were you the one on it when they took the measurement, or was someone else driving? I've never been on a dyno, but I've heard it takes a little bit of practice. Something to keep in mind if you start dynopetition (I made that word up, it means to compete with dynos). Disclaimer: The opinions expressed in this post are those of the author and do not necessarily state or reflect the views of the other members or the board owners. | ||
| Hybridmomentspass |
Buellitup - why do you feel that way? I've had my bike dyno'd twice, once they operated teh bike, the second time I did - the numbers were the same get it into the right gear (closest to 1:1 ratio) 'cruise' up to a certain rpm then WOT til you want to stop/redline close throttle and let it slow itself down done. Interested what you think makes a difference and where this practice comes into play etc | ||
| Trbulnt |
Someone else did the driving on the dyno. Most places that is the case for insurance reasons. Only reason I even had the bike ran was cause it was free! Plus I figured the bike needed to see redline at least once this year. | ||
| Tougelabs |
Thats a nice realistic number...Some of these guys on here are crazy throwing all sorts of numbers around... | ||
| Zac4mac |
Loretta has been on 3 different dynos, ridden by the dyno operators. Different "flashes", but the OEM ECM and all 3 were 127-128HP and ~70 ft-lbs. SAE corrected 5000' ASL. Z | ||
| Trbulnt |
Nice numbers Zac4Mac! I am unsure what if any correction factor was used on this dyno and they didn't have the proper attachment for torque output. Regardless to me it is just a number and the bike is still a whole lot of fun to ride!! | ||
| Blake |
>>> Thats a nice realistic number...Some of these guys on here are crazy throwing all sorts of numbers around... It's not realistic for a Dynojet dyno. There are dymamometer and there are dynamometers. Dynojet results for stock 1125's run in high gear run around 130 RWHP plus or minus. Put them on a Superflow or other and the results will drop 10 to 15%. The ambient conditions correction scheme also affects results with SAE producing slightly lower than STD. If the operator puts his full weight on the bike that too diminishes results as it puts a LOT of power sapping deformation/flexure into the rear tire as it is riding not on a flat surface, but a relatively small radius cylinder. | ||
| Blake |
Also a lot of dyno operators stop well short of redline. You really need to see the plot to get a feel for how well any dyno run was made. Fourth gear will show lower numbers than 5th, which in turn will be lower than a run in 6th gear. A brake dyno that holds the engine to an even lesser rate of increase will show even higher power. | ||
| Hybridmomentspass |
blake - good points. All dynos are a bit different and certain factors like gear, temp, humidity etc will play a roll. | ||
| Trbulnt |
Was 4th gear, operator sitting on the bike, and it was a Dyno Jet and it hit redline as the operator liked that the tach needle lit up! Didn't think I would get this kind of discussion from a dyno run thread lol. | ||
| Trbulnt |
I will take a picture of the dyno sheet when I get home and post it up. | ||
| Blake |
Will be interested to see the correction scheme used. | ||
| Zac4mac |
Mine were on Dyno-Jets, 2-200s and a 250. All I got was HP on the 200s; HP, Torque and A/F on the 250. Also, we ran it in 5th, 4th showed about 10 HP down. Z | ||
| Blake |
Run it in 6th and you'll gain even more.  _ | ||
| Musclecargod |
Strange that some dynos don't give torque readings -which is what really counts- as it is a more direct measurement than HP, which for all practical purposes is derived from torque. Given your HP and RPM torque is a direct conversion. | ||
| Trbulnt |
My dyno sheet with both runs.  | ||
| Zac4mac |
Couldn't run in 6th, the dyno wouldn't spin that fast without breaking. As it is, redline in 5th on the OEM ECM is 155mph. | ||
| Blake |
There you go. Triumph guy knows how to sabotage a Buell dyno run. | ||
| Trbulnt |
I would agree Blake but the dyno was operated by an outside company...they might have been in cahoots though with the Triumph dealership that hosted the show!!! Remember too, it was very hot that day, I had just ridden to the show where the bike sat all of 15 minutes than straight on the dyno with very small cooling fans running. Heat soak may have affected the power. Still doesn't matter to me as the bike does everything I need it to and more! | ||
| Blake |
If he was running all the bikes in 4th gear while sitting on them, it would just be poor dyno testing is all. | ||
| Firemanjim |
You will get best numbers in whichever gear is 1-1.Tubers we run in 4th,1125's and metric we run in fifth. | ||
| Blake |
Ain't 5th gear for the air-cooled Buells the 1-1 gear? | ||
| Duphuckincati |
Would you use a different gear with the "CR" vs the "R"? | ||
| D_adams |
Erik Buell Racing uses straps and the operator sits on the bike. 5th gear for 1125r. I would imagine the cr is the same. Not sure on xb's, but the local dyno operator told me they always use 4th for them. Drummer getting tuned last year. I think it took 4-5 hours for it, only got a short bit on video. Mine getting a baseline set of runs. | ||
| Blake |
If you are tuning, it doesn't matte what gear is used. But if you want to measure how much power the thing makes, then the higher the gear the better. Lower gears consume more power for spinning up the rotating bits more quickly. Higher gears keep the engine from accelerating so quickly, thus less power is consumed to energize the spinning bits. Think of it like a motor spinning up a flywheel to 11,500 rpm. The quicker you you want to get to that rpm, the more powerful motor you need. The drivetrain is also under higher stresses for lower gears, thus the flexure of applicable parts is greater and more losses occur. | ||
| Sprintst |
Okay, I add this only as something to compare 2007 Triumph Sprint ST. rated 125 hp Three things stick out to me: #1 - the Buell is rated 21 hp more, but the charts show about the same peak hp #2 - my dyno run is showing about 12 mph higher than the Buell run #3 - the Buell is about 100 lb lighter, but still feels much stronger than the Sprint So, I'm wondering if it is a gear thing. I don't recall what gear they used on this run  (Message edited by sprintst on July 15, 2011) | ||
| Zac4mac |
Here's a pic of the run on Dan's 200 at NRHS, early last year. Dan has a 250 now I hear....  And here is my "baseline" at High Country's 250, the day before I got my race ECM.   Z (Message edited by zac4mac on July 16, 2011) (Message edited by zac4mac on July 16, 2011) |
