1200 Conversion
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Tourer
Joined: Jan 2009
Posts: 337
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From: Marana, Arizona
1200 Conversion
I had my conversion done to my Iron and love how the lady runs. She screams like a mashed cat and puts a smile across my mug. Here's my question. I drilled the stock mufflers with a 1 1/4" hole saw to let more sound out and I am really pleased with the noise level and like the look of the stock pipes and don't really want to go to another exhaust. Since the conversion HD installed an SE A/C (included in the kit) allowing much more air in. I know if you do the A/C and pipes you need a tuner but the EPU is downlaoded to the SE specs of the 1200 conversion so will the drilled out baffles cause me to burn my rings up? I assume that the download after the conversion would be done to support the extra air coming in since the SE A/C is included in the kit. What say you my fellow scooter trash?
Road Master
Joined: Jun 2006
Posts: 933
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From:
Were the pipes drilled prior to the 1200 kit?Did they use a MAP for just the kit and SE air cleaner.No it won't burn your rings out never does.It may burn a hole in the piston if the a/f ratio is too lean.If they dynoed the bike you should be fine.
Tourer
Joined: Aug 2009
Posts: 295
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From: Barre,VT
If the tune was done I'd say your fine. I'm sure you could also find a performance slip on that looks just like your stockers since that is a restriction now. http://epiflex.com/chromesport09_10.htmlhttp://bub.com/Harley_Davidson_FL_Touring_Models.cfm?pa=List&psea rch=&sc1=Harley%20Davidson&sc2=Sportster&sc3=&zsb= 0
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Yes, you need a tuner, or XIED, or some other method of (at a minimum) enriching the mix, or you will burn holes in your pistons. Drilling the exhaust allows more air through, as does adding the SE A/C. Both of these mods lean the mix, and while the ECM might be able to compensate for one (depends on who you ask, but when it comes to my bike, I'm conservative, so I say it won't), it can't compensate for both. Upside, if you use a tuner, you'll get more power and smoother power delivery as well as protecting your engine.
Tourer
Joined: Jun 2010
Posts: 255
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From: Joliet, IL
I'd say for the amount of money you paid for the 1200c and labor, what's a few more bucks for the tuner to ensure the bike is running properly.
Good to hear the conversion is well worth it, I plan on doing this soon.
Good to hear the conversion is well worth it, I plan on doing this soon.
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Tourer
Joined: Jan 2009
Posts: 337
Likes: 0
From: Marana, Arizona
I had drilled the baffles prior to the conversion. I know they downloaded the EPU for the new SE A/C but the conversion is done as if you had stock pipes on. The download should compensate for the extra air since it isn't stock A/C. I talked to HD and they said they run lean already coming from the dealer but the download should make it run okay. They said a tuner would be the best way to go but he had never seen a whole burned in the piston just from drilling a whole in the baffles. If I had the money I would just do the tuner.
Road Captain
Joined: Mar 2009
Posts: 570
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increasing the exhaust flow does not change the afr, so no harm to the motor...you could lose some low end torque, but a tuner fixes that and you can optimize the way it runs...btw i think you mean ecu or ecm, electronic control unit/module
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Tourer
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From: Marana, Arizona
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Road Captain
Joined: Mar 2009
Posts: 570
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I didn't know that the exhaust did not change the air flow. 
By the way Devil that is a sick looking nightrain!