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Sportster Motorcycle Motor - Top End Discuss Sportster Motorcycle Top End issues. Rockerboxes, Valves, Cylinders, Pistons, Rings, Lift Rods, etc...

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  #11  
Old 2 Weeks Ago
shanneba shanneba is offline
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Join Date: Jul 2013
Location: Franklin, Indiana
Posts: 1,870
Sportster/Buell Model: XL1200C
Sportster/Buell Year: 2013
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Quote:
Originally Posted by shipwreck View Post
Ok. Scratching my head here....looking for that thread that went super in-depth on the powervision, can't find the darned thing though. anyone be able to assist with a link?

My thinking is that I need to do some tuning on sunday.
There is this PV thread (older)
http://xlforum.net/forums/showthread.php?t=1199290

This one is newer (started in 2015)
http://xlforum.net/forums/showthread.php?t=1932673

34-38 at 2250 and 50 MAP seems a little advanced to me.

I don't hit 38 degrees at 50 map until about 4500 rpms.
I looked at many of the HD stage 1 tunes, it seems to me they improved the timing as they changed to the 374 and 414 software levels. Those software levels are lambda based tunes and also have a "closed loop" AFR range of around 14.2- 15.0.
I downloaded the HD Pro Street tuner software to view the tunes.
You can use all 1's for the VCI serial number.

I run closed loop at all MAPS 80 and under up to 4500 rpms.
(I will at a MAP over 80 (in open loop) at most TPS of over ~30 %)
I do have the AFR Bias set a little richer at 80 and 100 MAP and above 4500 rpms.
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2013 XL1200C

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  #12  
Old 2 Weeks Ago
Tomcatt Tomcatt is offline
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Quote:
Originally Posted by shanneba View Post
34-38 at 2250 and 50 MAP seems a little advanced to me.
I don't hit 38 degrees at 50 map until about 4500 rpms.
Are you monitoring (logging) knock? The software won't pull timing but it will tell you there's knock.
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Last edited by Tomcatt; 2 Weeks Ago at 13:43..
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  #13  
Old 2 Weeks Ago
shanneba shanneba is offline
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I have a 2013 Sportster, the ION sense was not available then.
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