CVO engine issues
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Joined: Dec 2017
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From: RAP<DEB<LAX<AK<ELP<MEM and
Knock on Load
2012 Street glide CVO 110 build to stage 4 117, with additional head work to open up flow.. upgraded Clutch, Pipes and headers. All good stuff, fast and smooth ,, BUT,,have been unable to tune out a heavy pre iignition knock on load after heats up except by switching to a 100 octane fuel over Cali 91 . A colder plug is our next effort. Know your beast and its burdens. . What say the pro s American Biker Chronicles say colder plug let us know your thoughts
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We see the CVO valve springs(manufactured by Comp Cams) to be so aggressive on the surge, (when the inner dampner/inner spring/outer spring all come together) that the lifter axle doesn't stand a chance over the long haul.
That said, we use a progressive wound spring ie "beehive", and ONLY S&S lifters in all of our builds here.
Many times we build the CVO 110" to a 124", using the ported CVO Head, either a 58, or 66mm S&S t/body, and one of the plethora of cams currenlty on the market to suit the wants/needs of the owner.
7, 124" engines being custom here, built as I type.
Scott
That said, we use a progressive wound spring ie "beehive", and ONLY S&S lifters in all of our builds here.
Many times we build the CVO 110" to a 124", using the ported CVO Head, either a 58, or 66mm S&S t/body, and one of the plethora of cams currenlty on the market to suit the wants/needs of the owner.
7, 124" engines being custom here, built as I type.
Scott
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snowdevil23
Screamin Eagle CVO Models
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Feb 20, 2019 07:47 PM
