CVO Technical > Twin Cam
S&S lifter choice?
SteveVO:
HD, when you say service at 25K intervals for the Hylifts, what does that mean, pull and examine, repack bearings or replace? Replacing every 25K seems a bit excessive.
I have a 2015 CVO 110, with 21K miles so replacing the stock lifters is number 1 on my to do list.
r0de_runr:
Those 110's have dual wound valve springs that are pretty stiff compared to some others. However do not make the same mistake I did and change to single wound behive AV&V springs. I broke a spring and had to rebuild my top end.
Because the springs are so stiff is one reason to swap out the lifters, and the ramp of those 255's like HD Street said.
The op asked about S&S so I showed him what S&S sells now, doesn't look like they sell standards and premiums now.
As for me I'm running Comp Cam's 850-4s in my 14 limited. (yes I've seen the video)
grc:
--- Quote from: SteveVO on February 10, 2020, 01:42:43 AM ---HD, when you say service at 25K intervals for the Hylifts, what does that mean, pull and examine, repack bearings or replace? Replacing every 25K seems a bit excessive.
I have a 2015 CVO 110, with 21K miles so replacing the stock lifters is number 1 on my to do list.
--- End quote ---
If you were talking about any other vehicle you would be correct, a lifter replacement at 25k is almost unheard of these days. However, you are talking about a H-D CVO110 engine, many of which have had catastrophic failures at 10k to 15k miles. A lifter change at 15k to 20k is cheap insurance, compared to a $5k engine repair bill. If you want a longer term fix, you'll need to scrap the stock cams and valve springs.
JMHO - Jerry
HD Street Performance:
The stock springs are not "too stiff". They do have trouble controlling the stock cam and loft at the rpm stated. Reason is flex of pushrods, cam lobe design, and valve train weight. Lifters just get caught in the mix. Not the noise solution by itself.
I use a dual spring that is 140# seat with a 400# spring rate, .670 max lift.
J.D.:
grc (Jerry) is spot on IMHO.
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