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DYNO Charts and Result Post your dyno charts and results here.

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  #1  
Old 30th September 2005
hondo hondo is offline
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Default Stage I XL1200R

My original post on this forum was "Painfully stock dyno run".
A couple of days ago I visited the dyno again with the following results:
74.0HP@6,100 rpm
Torque 76.9ft.lbs@4,500 RPM
A slight dip in the torque curve centered at 3,500RPM, probably exhaust reversion, torque was 70.0ft.lbs. or greater between 2,500RPM and 5,500RPM.
Air/fuel ratio on the 74HP run after the intial rich dip was between 13.0-13.6 until 3,200RPM when it dropped to between 11.6 and 12.8 for the remainder of the run.
My thoughts are, exhaust reversion from 3,000-4,000RPM and a 180 main jet that is too rich for this combination.
Present carburetor settings are: #45 pilot jet, 2 1/2 turns out on the mixture screw, two 0.022" washers under the needle, #180 main jet.
A 16.5HP increase thus far! The dyno operator stated they usually see 7-10 HP with stage I modifications.
Your thoughts?
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  #2  
Old 30th September 2005
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I just did a baseline dyno on my '05 XL1200R Stg I yesterday.

We've got the same bikes. I love the Yellow Pearl.

76.1 HP and 81.5ft.lbs torque - great torque numbers and a nice convex torque line. I'm still playing with my jetting and hope to improve on this slightly.

Cheers,

Brett Shadbolt
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  #3  
Old 30th September 2005
hondo hondo is offline
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Default

What settings are you using on your TwinTec ignition module? That will be my next step up the ladder purchase wise.
I might have to wait until after Christmas though, since my wife is having knee surgery soon.
You have no reversion problems with your SE II's! I had a slight dip of 2ft.lbs. in the torque curve from 3,000-4,000 centered at 3,500RPM. I thought this was interesting since the air-fuel ratio nosedived at 3,200RPM to 11.6 and stayed rich the remainder of the run.
I'm liking the sound of the SE II's better now after a 220 mile round trip to vist my parents in IL, 52mpg @75mph except for 20 miles in/out of town.
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Old 30th September 2005
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Twintec is currently at 2-3 but just got it and am still dialing it in.

I don't have any dip in the torque curve at all, pretty much a perfect convex. I've just bought a set of Python 2-1's and they should arrive in about a week, so will be atking the SE II's off soon. Once the 2-1 is installed and twintec/jetting is finished I'll do another dyno and let you know how it goes.

Cheers,

Brett
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  #5  
Old 30th September 2005
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Are you doing the proper 5th gear roll on method? Make sure you do it while riding, not on a dyno. The bike should be under real world conditions when adjusting the ignition curve. And remember if the bike feels stronger at a lower setting than a higher one, then the lower one is probably the correct one. The roll on method just alerts you to when the ignition is way to far advanced. Setting it on a hot day is also preferred. Another good trick is to set it while using lower octane gas. Your bike will really let you know the correct setting then! =)
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  #6  
Old 30th September 2005
hondo hondo is offline
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Dyno sheet
I hope this works, I'll try it from work tonight.
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  #7  
Old 30th September 2005
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You guys keep this stuff coming, it rocks. This is the meat and potatoes of this forum. I greatly appreciate you guys sharing your gear head knowledge.
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  #8  
Old 1st October 2005
hondo hondo is offline
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Go to my gallery to see a copy of the dyno sheet.
http://xlforum.net/photopost/showpho...8&limit=recent
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