2014 cams
Seasoned HDF Member
Joined: Jul 2007
Posts: 6,336
Likes: 67
From: SW Minnesota
Couldn't figure out your post, until I figured out you got the two cams reversed! The new 2014 cams are on the right in the diagram!
They have 13 degrees of overlap! The 2013 cams on the left have -7 degrees.
Grand HDF Member
Joined: Sep 2013
Posts: 3,820
Likes: 587
From: Michigan
SE255 cams have Intake Duration of 211 degrees, Exhaust is 235 Degrees. total lift is .556/.556
Road Captain
Joined: Sep 2013
Posts: 612
Likes: 4
From: Iowa
I have no idea what originals are but I will say that after I put some 204s in a few weeks ago it felt like a totally different bike, in a good way. The originals might make for some good paper weights! IMO
Stellar HDF Member
Joined: Aug 2008
Posts: 2,107
Likes: 283
From: California, Md now Savannah, Ga
Any before and after dyno?
Road Captain
Joined: Sep 2013
Posts: 612
Likes: 4
From: Iowa
No dyno yet, waiting on recall parts for clutch to come in and going to get dyno done at that time. I first installed the power duals, twin slash rounds, se heavy breather and sepst and reflashed and honestly from the seat of my shorts couldnt tell much difference except for sounded better. Was going to wait for winter project to installs cams, but couldnt wait. :-) After installing the cams and reflashed again the exhaust note is completely different and pulls much harder. I will post the dyno results in a few weeks.
Stellar HDF Member
Joined: Aug 2008
Posts: 2,107
Likes: 283
From: California, Md now Savannah, Ga
No dyno yet, waiting on recall parts for clutch to come in and going to get dyno done at that time. I first installed the power duals, twin slash rounds, se heavy breather and sepst and reflashed and honestly from the seat of my shorts couldnt tell much difference except for sounded better. Was going to wait for winter project to installs cams, but couldnt wait. :-) After installing the cams and reflashed again the exhaust note is completely different and pulls much harder. I will post the dyno results in a few weeks.
Road Captain
Joined: Sep 2013
Posts: 612
Likes: 4
From: Iowa
Congrats, let me know how it all shakes down!
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Road Warrior
Joined: Apr 2010
Posts: 1,648
Likes: 37
From: Monroe, Louisiana
Overlap affects emissions by allowing fresh intake fuel to possibly be drawn through the cylinder and into the still open exhaust valve port. The benefit of overlap is that the still open exhaust valve helps to draw in the fresh intake air.
I believe the 255 closed the intake valve at 25 degrees after BDC. If that is true, they will build more cylinder pressure than the stock cams shown in the diagram,which closes the intake at 30 degrees after BDC.
I believe the 255 closed the intake valve at 25 degrees after BDC. If that is true, they will build more cylinder pressure than the stock cams shown in the diagram,which closes the intake at 30 degrees after BDC.
