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I own a ’07 FLHTCU that was upgraded to the stage II 103 ci (80hp & 103tq with 255 cams, Rinehart true-duals w/quiet baffles, & SERT) not long after I bought it. I've been told by several people I should have better hp & tq numbers with this build. Also, I’ve gone through a couple of starters since then and need to do something different now that my warranty has expired. I have a buddy with a similar build that added push-button compression releases after his second starter replacement and his starts great now. I know the biggest changes I’ve noticed on other bikes I’ve owned have always come from head/cam work, but I really can't afford to get too radical right now.
When I wind this bike up I’m at 100 mph when I hit 4th gear and right at 120 mph when I shift into 5th at 6200 rpm. Getting to 100 mph doesn’t take long (3rd gear is awesome), but the pull from 4th to 5th takes a little while. I’m getting older, plus both the bikes and I are getting heavier, so I don’t do this every day; but I do have a long, secluded stretch of road near my home where I like to go for an occasional adrenalin rush. The rest of my time on the bike is spent with year round highway cruising between 65-85 mph (with occasional bursts) on 50 mile round-trips to work and 1000 mile round-trips to visit family.
I'm currently looking at the S&S 551 or 583 Easy Start Cams. I can do that pretty cheap and don't even have to pull the heads. One of my buddies, that seems to know a great deal than I do about lift and duration, told me that I should go with the 583, but I'm wondering if there will be too much of a difference on the low-end during take off. You have to feather the clutch and throttle to get all of that weight going now. He also told me that I could get a regular cam with better duration and valve timing and the starting wouldn't be an issue at my current 10:1 compression ratio. What I'm asking if there is anyone out there that could tell me about these two cams or recommend another grind that will work well with my setup. I wouldn't mind a little more power and definetly got to start better.
Thanks for any suggestions!
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I am also looking at those 2 cams. I like the HP/TQ curve of the 583 best, but am concerned about the .583 lift with stock springs and clearance. I know this doesn't help but maybe some cam expert can chime in.
Do you mind tell us why you have to feather the clutch.
I have the SE 255 cams only-still 96 ci. Pulls like a tractor . About 115 is about all I can get out of it. 100 is easy and quick.
From the sounds of it you have all the speed you need.
I would be surprised if you find a different cam that pulls as good as the SE 255 in the lower rpm range.
Are you experiencing problems on take off?
I had a problem for a while. Had to feather the clutch because of a jerking, like it was geared way to high, it is some. When loaded and 2 up was when it was it's worse. Turned out to be the compensator sprocket. Not saying it's the same thing you are referring to. I went to the SE compensator and solved my problem.
I had a problem for a while. Had to feather the clutch because of a jerking, like it was geared way to high, it is some. When loaded and 2 up was when it was it's worse. Turned out to be the compensator sprocket. Not saying it's the same thing you are referring to. I went to the SE compensator and solved my problem.
What is the best cam for my FLHTC?
