What Spark Plug Do You Use?
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Outstanding HDF Member
Joined: Aug 2010
Posts: 2,386
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From: The City Of New York
What Spark Plug Do You Use?
OK, I know this subject has probably been beat to death, but looking for some current input. Which plug? Regular or platinum? OEM or other? Any noticeable performance difference? How about reliability experience? Gapped at .040 or other? Do you index?
FIRE AWAY!!!
FIRE AWAY!!!
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
late models use an ion sensor on the ignition coil.
some plugs may give reading out of "normal" to the sensor, resulting in reduced performance.
some riders have reported problems even with screaming eagle plugs.
on my 09, I just use stock oem plugs- they work great.
on my Evos and Pans I use platinum style plugs, these have less sophisticated ignition systems, and i generally gap as wide as possible without misfiring. each bike is a little different
mike
some plugs may give reading out of "normal" to the sensor, resulting in reduced performance.
some riders have reported problems even with screaming eagle plugs.
on my 09, I just use stock oem plugs- they work great.
on my Evos and Pans I use platinum style plugs, these have less sophisticated ignition systems, and i generally gap as wide as possible without misfiring. each bike is a little different
mike
Outstanding HDF Member
Joined: Sep 2010
Posts: 2,630
Likes: 185
From: Mountain West, Big Sky Country
i use the V-rod plug in my CVO 110, it seems to perform better with this plug than the standard plug.
I use the Autolite version not the HD version
http://www.harley-performance.com/ha...park-plug.html
I use the Autolite version not the HD version
http://www.harley-performance.com/ha...park-plug.html
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Grand HDF Member
Joined: Dec 2007
Posts: 4,999
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From: Bay Area
Iridium plugs in my new 103 build, prior to that always ran 6r12's. I dont think anyone indexs plugs for a street slug behemoth
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Extreme HDF Member
Joined: Jun 2011
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From: Glendale AZ
NGK iridium cooler VRod plugs. Normal gap. Tried indexing but got tired of f'in with washers so its close. Originally went to them when making feable attempts at pinging issues....diff thread.
Outstanding HDF Member
Joined: Feb 2007
Posts: 2,710
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From: Spokane, WA.
If ya ever check out the box of lube guys web site, they show ahem, increase in performance with iridium plugs. I dunno, i have used autolite and OEM HD plugs.
I am running the OEM plugs right now.
I am running the OEM plugs right now.