G oog le Buell 1125R Forum | Login/out | Topics | Search | Custodians | Register | Edit Profile


Buell Forum » 1125R Superbike Board » Archives 001 » Archive through July 17, 2011 » My 1125R dyno results. « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Trbulnt
Posted on Saturday, July 09, 2011 - 05:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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!
Top of pagePrevious messageNext messageBottom of page Link to this message

Buellitup
Posted on Sunday, July 10, 2011 - 08:37 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Hybridmomentspass
Posted on Sunday, July 10, 2011 - 09:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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
Top of pagePrevious messageNext messageBottom of page Link to this message

Trbulnt
Posted on Sunday, July 10, 2011 - 12:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Tougelabs
Posted on Tuesday, July 12, 2011 - 01:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thats a nice realistic number...Some of these guys on here are crazy throwing all sorts of numbers around...
Top of pagePrevious messageNext messageBottom of page Link to this message

Zac4mac
Posted on Tuesday, July 12, 2011 - 04:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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
Top of pagePrevious messageNext messageBottom of page Link to this message

Trbulnt
Posted on Tuesday, July 12, 2011 - 09:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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!!
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Tuesday, July 12, 2011 - 11:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

>>> 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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Tuesday, July 12, 2011 - 11:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Hybridmomentspass
Posted on Tuesday, July 12, 2011 - 01:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

blake - good points. All dynos are a bit different and certain factors like gear, temp, humidity etc will play a roll.
Top of pagePrevious messageNext messageBottom of page Link to this message

Trbulnt
Posted on Tuesday, July 12, 2011 - 04:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Trbulnt
Posted on Tuesday, July 12, 2011 - 04:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I will take a picture of the dyno sheet when I get home and post it up.
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Tuesday, July 12, 2011 - 05:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Will be interested to see the correction scheme used.
Top of pagePrevious messageNext messageBottom of page Link to this message

Zac4mac
Posted on Tuesday, July 12, 2011 - 06:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Tuesday, July 12, 2011 - 08:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Run it in 6th and you'll gain even more. : )_
Top of pagePrevious messageNext messageBottom of page Link to this message

Musclecargod
Posted on Tuesday, July 12, 2011 - 08:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Trbulnt
Posted on Tuesday, July 12, 2011 - 09:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My dyno sheet with both runs.

Top of pagePrevious messageNext messageBottom of page Link to this message

Zac4mac
Posted on Tuesday, July 12, 2011 - 09:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Wednesday, July 13, 2011 - 12:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

There you go. Triumph guy knows how to sabotage a Buell dyno run.
Top of pagePrevious messageNext messageBottom of page Link to this message

Trbulnt
Posted on Wednesday, July 13, 2011 - 04:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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!
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Wednesday, July 13, 2011 - 04:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If he was running all the bikes in 4th gear while sitting on them, it would just be poor dyno testing is all.
Top of pagePrevious messageNext messageBottom of page Link to this message

Firemanjim
Posted on Wednesday, July 13, 2011 - 06:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You will get best numbers in whichever gear is 1-1.Tubers we run in 4th,1125's and metric we run in fifth.
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Thursday, July 14, 2011 - 07:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ain't 5th gear for the air-cooled Buells the 1-1 gear?
Top of pagePrevious messageNext messageBottom of page Link to this message

Duphuckincati
Posted on Thursday, July 14, 2011 - 07:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Would you use a different gear with the "CR" vs the "R"?
Top of pagePrevious messageNext messageBottom of page Link to this message

D_adams
Posted on Thursday, July 14, 2011 - 08:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.

Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Friday, July 15, 2011 - 07:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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.
Top of pagePrevious messageNext messageBottom of page Link to this message

Sprintst
Posted on Friday, July 15, 2011 - 08:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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)
Top of pagePrevious messageNext messageBottom of page Link to this message

Zac4mac
Posted on Saturday, July 16, 2011 - 12:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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)
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a public posting area. Enter your username and password if you have an account. Otherwise, enter your full name as your username and leave the password blank. Your e-mail address is optional.
Password:
E-mail:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration