Recommended spark plug ?
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
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From: la la land jerzey
it really depends on the quality of the ignition coil - accell 45,000 volt and the dyna 40,000 .040 works well -
compufire 80,000 volt coil we use a machine for Testing with Sun Oscilloscope to determin the rate of energy loss at high RPMs ( dyno pulling ) and gap at that spot to take full advantage of the spark intensity Live --
compufire 80,000 volt coil we use a machine for Testing with Sun Oscilloscope to determin the rate of energy loss at high RPMs ( dyno pulling ) and gap at that spot to take full advantage of the spark intensity Live --
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
Likes: 5,449
From: la la land jerzey
the harley coil is really very good - i have only swapped them out seeing cracks in them while doing a top end -- we have a milk crate full of them its a freebe perk for a job
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