I have not seen a dyno chart, what I did find was two individuals that have both run the 255s and 254Es in 103s and they say they can't tell a deference between the cams riding.

 

Installed SE A/C, Fatshotz, SE255s and factory download before delivery. Parts are registered with HD and have full factory warranty. Must be done within 60 days of purchase.
Bike really has low end torque and really comes on after 2700. Very hard on gas at beginning, tank lasted under 100 miles on highway. Ride at 107kph in 6th, do not need to downshift when passing.
Perfect for highway riding.

 

The compression of stock 103" using .045 head gaskets is a good spot for 204's. Bumping up the compression with .030 head gaskets "might" make it a bit more difficult to tune...

 

Check out the tman 555 cams and he also came out with a new torquer 555 cam.

 

I started out with just the SE255 cams and ended up going ahead and adding the 103. My dyno chart showed the cam picking up at 2500 rpm and then running out at 3500 which is where I do most of my riding. My hp is only 72 but the torque is at 98 fp. I like this combo really well good luck in your decision...

 

What exactly is wrong with the SE cams?

 

Cams, oil, and tires. Doesn't make a difference which one you pick out of the three there is always someone with a different opinion is what I'm finding. You are doing the right thing by doing your research. Good luck and hopefully when you finally make your decision only you and you alone can make the determination of satisfaction with whatever cam you choose.

 

I first added AC ,pipes and TTS master tune, got a great bump in overall performance. Then after 5,000 miles on the 103 Limited, installed se255 cams. GREAT boost in low speed to mid range torque, perfect for anyone that wants the most out of the 1500 to 4,000 rpm range. Are there cams that will pull harder? Yes, but not till past 2500 rpm, and usually more.
For us guys that ride two up, or just like the low end torque these motors are known for, its hard to find a better all around cam with great manners IMHO. There are only a couple of other cams I would consider for my stock 103 and my riding style. One being the 48h. It is basically a touch better for HP than the se255, not having emissions constraints to worry about. It also has an intake valve closing point very close to the 255, which keeps the torque down low. I went with the se 255s because I got them used, and at $150, pretty tuff to beat for the money. As for the "high lift", they are factory cams in the CVO 110 motors, so whats the salesman's concern? Just lack of knowledge, or sales hype.

 

I'm with you on that. I was talking with the machinist doing my heads (the guy is also a serious Harley drag racer) and he prefers SE cams over just about anything in the aftermarket. He claims that Harley puts more R&D into their cams than the after market can afford to do.

 

Well I've got to weigh in on this one as well, I've said it several time's but will again, the 204 cams are the best cams I've ever used, I've had 203's, HQ500's and Andrews 37's and the 204's beat them all, 204's are advanced on the intake some and a closing point of 34 helps create the tq down low, I saw a comparsion of my dyno chart to a 255 and the 204's pulled as good if not better down low then blew them away around 4000 rpm's, my bike is just a 96" but it does 90hp and 102tq, thats a sae run as well, 204's in a 103 would be awesome.