Twin cam vs single cam
Road Warrior
Joined: Sep 2016
Posts: 1,395
Likes: 364
From: Okmulgee
All marketing. There was never a valid engineering reason for the twin cams. The twin cam Harleys would be like Mopar, Ford and GM making there push rod single cam V8's nested twin cams. Pure follie and stupid from a engineering stand point.
The single cam M8 and 4 valves per cylinder was what got me interested in a Harley again.
The single cam M8 and 4 valves per cylinder was what got me interested in a Harley again.
Road Master
Joined: Jan 2014
Posts: 1,036
Likes: 25
From: Texas
the twin cam was designed to run quieter to meet epa regulations, along with having a better oil circulation system, better valve/pushrod alignment, easier upgrading, a stronger crankcase, and a few other things that sound like corporate propaganda BS.
Ultimate HDF Member
Joined: Apr 2014
Posts: 6,322
Likes: 2,500
From: Tennessee
That pretty much sums it up, and it worked too.
The T/C was the most solid engine/transmission unit ever built by Harley.
The EPA (may they rot in hell) forced the use of chain driven cams because the gear whine from gear driven cams wouldn't pass the ridiculous noise restrictions.
Harley came up with a chain drive system that worked but needed regular maintenance and never really made it clear to consumers exactly what needed to be serviced and when.
Then of course as Harley always does, as time went on they started cheaping down the engine components and turned the later model motors into junk.
I'll stick with my early T/C motors....
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13RoadKing
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Mar 29, 2017 08:13 AM
