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4th December 2022
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XL FORUM TEAM MEMBER
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Join Date: Oct 2008
Posts: 1,076 Sportster/Buell Model: Sportster Sportster/Buell Year: 1990 Sportster/Buell Model #2: Sportster Sportster/Buell Year #2: 1975 Other Motorcycle Model: Buell S1 W Other Motorcycle Year: 1998
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Finally a Dyno session to my 90 c.i.

Torque values are in NM . 142.4 Nm = around 105-106 ft lb
__________________
1990 Sportster Axtell 90 ci, CP Carrillo 3.875 30° deg pistons,STD Heads, 615V2 RedShift cams, HSR48,
Carrillo 6.938 rods (All HammerPerf)
Hammer Billet Sledge air filter
Hammer Billet Manifold.
160/60ZR17 rear on Akront 5.50" Alu rim
100/90-19 front on Akront 2.50" new Alu rim
YSS 13.75 rear shocks
1975 XLH almost stock
1998 Buell S1W almost stock
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4th December 2022
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A Million Facts & Figures
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Join Date: Jan 2005
Location: Famous Potatoes
Posts: 10,458 Sportster/Buell Model: XL883 Sportster/Buell Year: 2007 Sportster/Buell Model #2: Buell Cyclone Sportster/Buell Year #2: 1999
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Impressive! And it got shut down before it was done, it's still in a steep climb.
If my conversion is correct, that's 124.5hp.
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4th December 2022
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XL FORUM TEAM MEMBER
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Join Date: Oct 2008
Posts: 1,076 Sportster/Buell Model: Sportster Sportster/Buell Year: 1990 Sportster/Buell Model #2: Sportster Sportster/Buell Year #2: 1975 Other Motorcycle Model: Buell S1 W Other Motorcycle Year: 1998
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Quote:
Originally Posted by aswracing
Impressive! And it got shut down before it was done, it's still in a steep climb.
If my conversion is correct, that's 124.5hp.
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Conversion is the same am SAE ( 95/1/CE). These are 126 Hp at the rear wheel.
This Dyno machine has a Range to configure (when it start to register and when ends to register)
It was set by the operator at 1700 Rpm to 6500 rpm.
So it ends at 6500. This run was the 2nd and the bike was still good temp .
Then it started to be too hot.
SO when I told him to put the limit at 7000 the bike was a bit too hot.
But then (in addition) I discovered that the Dyna 2000 file I installed was with a 6600 RPM LIMIT. (I was sure it was 7000)
So the next few session are with the rev limiter cutting the power at 6600.
At the end we tried to "cure" that little dip of torque at around 5000 rpm.
We run removing the Hammer Sledge KN oval filter (Backing plate only installed).
We smoothed the curve but the bike was no more cool and the 6600 CUT, kept the HP under 130.

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4th December 2022
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Dazed & Confused
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Join Date: Feb 2019
Location: Never Never Land
Posts: 3,366 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2017 Other Motorcycle Model: BMW R9T Other Motorcycle Year: 2015
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Quote:
Originally Posted by conv90
...(in addition) I discovered that the Dyna 2000 file I installed was with a 6600 RPM LIMIT...
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You might also check to see if your Dyna 2000 has a soft or hard cut and if a soft cut, what specs they use.
__________________
2017 XL1200C in SE Wisconsin, USA
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4th December 2022
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XL FORUM LIFE MEMBER
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Join Date: May 2014
Posts: 1,927 Sportster/Buell Model: xlh Sportster/Buell Year: 1974
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Quote:
Originally Posted by conv90
..Conversion is the same am SAE ( 95/1/CE). These are 126 Hp at the rear wheel.
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I know this is nit-picking,  but I believe aswracing is correct.
CV X .9863 = Hp
126.27 X .9863 = 124.54 horsepower.
Either way, a good number. Well done. 
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4th December 2022
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XL FORUM TEAM MEMBER
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Join Date: Oct 2008
Posts: 1,076 Sportster/Buell Model: Sportster Sportster/Buell Year: 1990 Sportster/Buell Model #2: Sportster Sportster/Buell Year #2: 1975 Other Motorcycle Model: Buell S1 W Other Motorcycle Year: 1998
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Quote:
Originally Posted by needspeed
I know this is nit-picking,  but I believe aswracing is correct.
CV X .9863 = Hp
126.27 X .9863 = 124.54 horsepower.
Either way, a good number. Well done. 
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Sincerely I don't know.
In Europe we use HP like CV and CV like HP , the difference is minimal.
What I know is that the operator (the owner of the Dynometer) has to pull the cluch after the computer tell to do it. He stays whit the clutch lever pulled untill the bike returns to about 1500 rpm.
What I've seen "live" on the screen is a 129.xx CV during a run (the third one) , then, instead, I have NO sheets with 129.xx CV , but the max i see is 126.
It's a NO-problem thing . The bike loose traction shiftinging from 1 to 2nd , from 2nd to 3rd and from 3rd to 4Th too ...
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4th December 2022
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XL FORUM TEAM MEMBER
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Join Date: Oct 2008
Posts: 1,076 Sportster/Buell Model: Sportster Sportster/Buell Year: 1990 Sportster/Buell Model #2: Sportster Sportster/Buell Year #2: 1975 Other Motorcycle Model: Buell S1 W Other Motorcycle Year: 1998
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Quote:
Originally Posted by Tomcatt
You might also check to see if your Dyna 2000 has a soft or hard cut and if a soft cut, what specs they use.
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I don't know the existence of this feature.
On the software I can put the rev limiter level but not a Soft or Hard cut strategy.

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