I just put on power duels and se255's on my 11 flhrc and I couldn't be happier...you will love the difference...before the change out at 45 in 6th gear the bike would buck and shake, now it just acts like its still in 5th, and when I roll on the throttle it just takes off like it use to in 5th...

 

"Falls on it's face" is a subjective frame of reference but I wouldn't go so far as to say it is a rumor. The 255 is a torque monster to somewhere between 4000-4500 rpms and very well suited for two up touring or someone that just doesn't need power above 4500rpms. However, if you compare similar builds where the only difference is the cams, one being a 255 and one being a 48, the difference is obvious. The 48 doesn't give much away to the 255 below 4000 but the 255 gives a lot away to the 48 above 4000.

To illustrate the point, look at the two dyno charts. Both basically Stage I builds with cams and tune. Looke at the TQ under the curve; which would be more fun to ride?

This forum needs a dyno section where charts can be posted so forum members can see the differences in performacne from different configurations. Those charts would answer a lot of questions and illlustrate what some of us try to communicate in a post.

 

well you can not even begin to compare those two charts LOL. It would be nice tho to see same cams on the same dyno all else being =. there is a great dyno tuner who often has said that if there were no dynos people would all be raving over the smaller cams ie people ride more in the 1500-4000 rpm range vs 3000-6000 rpm range. the 255 and 48H fall into that catagory as do several others.

 

It's a magical cam that has more torque at low rpms than any other cam in recorded history, and yet still pulls strong all the way to redline. It defies the laws of physics. It spits on Newton, Bernoulli, and Nikolas Otto. A motor with the 255 cams will make power on all four strokes. Guys with the 255 cams don't dyno tune their motors, because there's no need, the cams will make power even if they aren't tuned. And best of all, they're virtually free, because you can find them in the trash bins of CVO owners anywhere in the country.

 

Now that's some good rumor there with some truth rolled up in it...

 

Ahhh yes, the weekly cam/argument/debate.

 

After reading all the debating, I had to dig out a pic from Sturgis last year, and @ 70 mph I turn 2500 rpm. I realize its personal preference, but damn, I like the thought of the 255's especially if thats where they really begin to "pony up".
We did a pretty consistant 85-90 mph from the MN border to Pierre and I don't recall getting much over 3500 rpm.
Alot of my weekend riding is through the hills of western wisconsin with either my wife or daughter along and the 255's may offset some of the shifting as well.
Great thread, gotta love the forum,
thanks guys

Oh yeah, mine is an 07 FLHT, with V@H slippons (for now).

 

An 07-08 touring bike with the TC96 and the lazy 2.79 gearing is the best fit for the 255 cams, no doubt.

 

Why even be concerned with what your bike feels like at 45 in 6th? Seems to me that's just lugging the crap out of your motor. Anyway I ran the 255 in my bike when it was a 110 and it ran strong, no complaints at all bout that cam.

 

To the OP. The best advice is do some research and follow these simple rules:

Select a cam that matches your riding style and engine components.
Just because someone says their cam is the greatest cam ever, it doesn't make it so.
Do some homework on how cams work - this tech article is a good start.
http://www.nrhsperformance.com/tech_camshafts.shtml

Hope that helps. Thank you drive through.