Didn't ask for the "knock"
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Joined: Nov 2008
Posts: 1,423
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From: NW Ontario
Didn't ask for the "knock"
Had a dealer do a 103" Big Bore kit with new jugs, pistons and 255 cams. They installed the Stage I download for a 103 -bike ran reasonably well. Contacted Moco about unrelated matter and they suggested that the download was incorrect and should be the Stage II download for 103" w/cams. Went back to the dealer and they gladly did the Stage II download grattis. Trailered the bike home (dealer 200 miles away) took it for a ride and noticed that when the bike got hot and you cracked on the throttle - you could hear a knocking/pinging noise. My question: is it something in the download that is off or does the bike need to be properly tuned to accomodate the Big bore 103 and the Stage II download?? Should I be concerned about this as I would have to trailer it to a dyno (closest one is 400 miles away). I'd appreciate any input on this.
Road Warrior
Joined: Sep 2008
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My .02.
If it ran OK with the stage 1, get them to reinstall that and then take it for installation of a proper fuel management device and proper tune. You put big coin into the upgrade, why stop short of fully unlocking the potential?
If it ran OK with the stage 1, get them to reinstall that and then take it for installation of a proper fuel management device and proper tune. You put big coin into the upgrade, why stop short of fully unlocking the potential?
Ultimate HDF Member
Joined: Feb 2006
Posts: 5,939
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From: TX
It's difficult to cyber-diagnose, but it sounds like you are describing pinging.
"If" that is the case, then a Stage I flash would actually exaserbate the issue because the Stage I map has more ingition timing advance.
Your best bet would be a "real" tune with a SEST or TTS on a dyno, by a competent tuner.
"If" that is the case, then a Stage I flash would actually exaserbate the issue because the Stage I map has more ingition timing advance.
Your best bet would be a "real" tune with a SEST or TTS on a dyno, by a competent tuner.
Outstanding HDF Member
Joined: Sep 2005
Posts: 2,893
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From: USA
I second what PhilM said.
My preference would be TTS, since I'm running it.
But, if your that stuck on warranty work then take it to dealer with a dyno and have them tune it.
My preference would be TTS, since I'm running it.
But, if your that stuck on warranty work then take it to dealer with a dyno and have them tune it.
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Road Master
Joined: Feb 2005
Posts: 1,109
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From: Chattanooga, TN
The Harley dealer download is a waste of money, all it does is change the timing. Due the the EPA regs they can not alter the fuel management. You need a PC5 or a fuel management system that can change the lean fuel ratios. The 2010 HD Race Tuner is also EPA regulated, and won't do much for fuel ratios.
The new TTS is the way to go, it is nor EPA regulated like the Race Tuner.
Steve
The new TTS is the way to go, it is nor EPA regulated like the Race Tuner.
Steve