I'm impressed....should I be? Dyno!!!
Road Master
Joined: Oct 2007
Posts: 781
Likes: 1
From: Cave Creek, AZ
RE: I'm impressed....should I be? Dyno!!!
This happens everywhere I go. People need to understand thatr different dynos run on different days with different bikes cannot be compared. There is as much as a 15% variation on the Dynojet dyno's that I have seen all over the US.
What is more important is the gains of before and after, not the peak numbers. If he was only at 55 hp before, it's obvious that the final reading might very well be low too.... The torque peak numbers are odd, so I would ask that the runs be posted for comparison.
Don't get hung up on the numbers, a dyno is only a tuning tool.
What is more important is the gains of before and after, not the peak numbers. If he was only at 55 hp before, it's obvious that the final reading might very well be low too.... The torque peak numbers are odd, so I would ask that the runs be posted for comparison.
Don't get hung up on the numbers, a dyno is only a tuning tool.
Tourer
Joined: Nov 2006
Posts: 405
Likes: 0
From: Council Bluffs, Iowa
RE: I'm impressed....should I be? Dyno!!!
In addition to all of the rest of the comments/questions, I have a question: Where does the shop get their air for the dyno room? If they get it from outside, isn't it a little cool in PA to be tuning? My scoot's at the shop waiting in line for a 50 or sodegree day before it gets put on the dyno.
Stellar HDF Member
Joined: Sep 2006
Posts: 3,236
Likes: 95
From: lancaster, pa
RE: I'm impressed....should I be? Dyno!!!
thats amost exactly what my dyno sheet read.
same add ons too
Im happy with it though,just wanted a little more fuel,mildly nicer pipes,runs stronger especially pulling weight or passing on hwy. and after trying every thing to cool it off this made a huge difference. not looking for every ounce of power just a more enjoyable bike,,,mission accomplished
same add ons too
Im happy with it though,just wanted a little more fuel,mildly nicer pipes,runs stronger especially pulling weight or passing on hwy. and after trying every thing to cool it off this made a huge difference. not looking for every ounce of power just a more enjoyable bike,,,mission accomplished
Road Master
Joined: Jun 2006
Posts: 783
Likes: 1
From:
RE: I'm impressed....should I be? Dyno!!!
Yep! Its broke pull the motor build a beast! Just kidding dynos as mentiond above can be off no doubt but usualy not that much and I also don't know how the tq could not change for better or worse after changes are made just dont seem right but if it runns good, gets good mpg, and you are happy then its all good!
Road Master
Joined: Dec 2006
Posts: 1,058
Likes: 6
From: Omaha Nebraska
RE: I'm impressed....should I be? Dyno!!!
I to am amazed at all of thecomments. No one seems to care if they are comparing their numbersto SAE, STD or if any atmospheric correction standard was used.Or, what if the TQ #s stayed the same but changed to a different, more useable RPM range.What if a non DynoJet brand ofchassis dyno was used thatdoes not use DJ's inflated #s? Without before and after comparison graphsfrom the same dyno, how can anyone know where he gained or lost at given RPMs? Peak TQ or peak HP#s donot meanmuch unless we know where on theRPM band it occurs.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
RE: I'm impressed....should I be? Dyno!!!
ORIGINAL: jcbpa
prior to tune: max power = 55. 42 after tune: max power = 68.14
prior to tune: max torque = 76.54 after tune: max torque = 76.54
prior to tune: max power = 55. 42 after tune: max power = 68.14
prior to tune: max torque = 76.54 after tune: max torque = 76.54
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
RE: I'm impressed....should I be? Dyno!!!
ORIGINAL: geargrinder
I to am amazed at all of thecomments. No one seems to care if they are comparing their numbersto SAE, STD or if any atmospheric correction standard was used.Or, what if the TQ #s stayed the same but changed to a different, more useable RPM range.What if a non DynoJet brand ofchassis dyno was used thatdoes not use DJ's inflated #s? Without before and after comparison graphsfrom the same dyno, how can anyone know where he gained or lost at given RPMs? Peak TQ or peak HP#s donot meanmuch unless we know where on theRPM band it occurs.
I to am amazed at all of thecomments. No one seems to care if they are comparing their numbersto SAE, STD or if any atmospheric correction standard was used.Or, what if the TQ #s stayed the same but changed to a different, more useable RPM range.What if a non DynoJet brand ofchassis dyno was used thatdoes not use DJ's inflated #s? Without before and after comparison graphsfrom the same dyno, how can anyone know where he gained or lost at given RPMs? Peak TQ or peak HP#s donot meanmuch unless we know where on theRPM band it occurs.
Road Captain
Joined: Nov 2005
Posts: 571
Likes: 0
From:
RE: I'm impressed....should I be? Dyno!!!
Several stock 96's were dyno'd at my dealership and got an average of 77.9 ft-lbs and 62.6 hp. The stock torque peaked at around 3000 RPM and began to fall off at 3400 RPM.
I don't think many stage 1 bikes will get Torque's of 90 ft-lbs. I would think 83-86 ft-lbs more in line. Hp should be expected to go up 15%.
A dyno means something for your bike-it's very difficult to compare results to another bike. It's more than numbers, it's over what RPM range you achieve peak torque etc.
I don't think many stage 1 bikes will get Torque's of 90 ft-lbs. I would think 83-86 ft-lbs more in line. Hp should be expected to go up 15%.
A dyno means something for your bike-it's very difficult to compare results to another bike. It's more than numbers, it's over what RPM range you achieve peak torque etc.
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Road Warrior
Joined: Dec 2007
Posts: 1,750
Likes: 2
From: Bucks County PA
Yikes!!! Corrected #'s Dyno!!!
Well, I am pretty foolish, but it did spark some good conversation: I read the #'s wrong:Here are the corrected #'s
prior to tune: max power = 55. 42 after tune: max power = 68.14
prior to tune: max torque =65.98 after tune: max torque = 76.54
they said they were having a tough time because it was pretty cold outside? but the chart reads: RO Run conditions: 48.9 degrees F, 29.90 in-Hg. Humidity 8% SAE:0.95.... Now does that make it better or worse???
Advanced
Joined: Mar 2006
Posts: 84
Likes: 0
From: pa
RE: Yikes!!! Corrected #'s Dyno!!!
Saw that you are not too far from me. Let me know the dealer you used for your dyno tune. I am about to have mine done, and want to make sure it isn' where you took yours. Even for cold weather, I think those numbers could be better. Could have also been the smoothing used too. Was it the dealer in the Hatfield area, perhaps??