Head porting a stock 103"
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Road Captain
Joined: Nov 2004
Posts: 610
Likes: 53
From: Kennesaw, GA
Head porting a stock 103"
I have a 12 Streetglide with a stock motor, high flow aftermarket intake, HD reflash, cat removed and slip on's. Not real happy with the top end pull. Anybody ported the 103 without any other internal engine upgrades and had good results?
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
The first thing you need to do is install a good fuel management system like the TTS Mastertune or DJ Powervision and get a proper tune; that might give you what you need; the HD reflash has given you nada. A set of SE204 cams (with 1.7 rockers on the intake) or TMan 555 Torkster cams and a dyno tune will wake the bike up. As others have said, headwork at the same time would be the full monty but if $$$ is an issue, you could take it in phases which would require an additional dyno tune and add to the cost.
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Road Captain
Joined: Nov 2004
Posts: 610
Likes: 53
From: Kennesaw, GA
Reluctant to do cams. Did Zippers 575's in my 06 103" Fatboy and didn't like what it did for the low speed drive-ability. I ported the heads on that bike and saw decent results.
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Road Master
Joined: Feb 2007
Posts: 781
Likes: 35
From: St Louis
That sounds more like a tuning issue, than the result of the cam. Even a stock cam poorly tuned can have poor low rpm performance.
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HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
The problem with your current configuration, which you seem reluctant to recognize, is the HD flash in lieu of a proper tune. If you install heads, cams, or both, you will need a good fuel management system to tune the motor. Why not get the fuel management system and tune the motor you are running; I would bet that there is 5-10 TQ/HP yet to be pulled out of the current configuration. Then you have a baseline on which to build.