SE 255 cams
... 
Elite HDF Member
Joined: Apr 2009
Posts: 3,928
Likes: 1
From: Desert S. West
Question: How would the 255's do in a light Softail like the Night Train in your opinion?
I'm thinking if it does great in a heavy touring bike they should really make a lighter bike get up and go. Maybe even hard to keep the front end on the ground if really getting on it.
I'm thinking if it does great in a heavy touring bike they should really make a lighter bike get up and go. Maybe even hard to keep the front end on the ground if really getting on it.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Question: How would the 255's do in a light Softail like the Night Train in your opinion?
I'm thinking if it does great in a heavy touring bike they should really make a lighter bike get up and go. Maybe even hard to keep the front end on the ground if really getting on it.
I'm thinking if it does great in a heavy touring bike they should really make a lighter bike get up and go. Maybe even hard to keep the front end on the ground if really getting on it.
OTOH if you want a torque monster, don't care much about peak-HP, and don't necessarily want to make other engine upgrades (compression, c.i., etc.) the 255 should be at or near the top of your list.
Last edited by iclick; Jun 15, 2010 at 05:23 PM.
Elite HDF Member
Joined: Apr 2009
Posts: 3,928
Likes: 1
From: Desert S. West
Thanks iclick. If I'm reading this thread correctly; the 255's do their thing in the 2200-4200 range where most big twin riders live. Seems to be a good fit for any big twin "cruiser" rider. Now if someone likes to keep the rpm's in the 4-6k range I'm sure there are better cams.
Howabout the new Andrews 48? Any good news about it yet? Maybe that question is best left to another thread.
Howabout the new Andrews 48? Any good news about it yet? Maybe that question is best left to another thread.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Thanks iclick. If I'm reading this thread correctly; the 255's do their thing in the 2200-4200 range where most big twin riders live. Seems to be a good fit for any big twin "cruiser" rider. Now if someone likes to keep the rpm's in the 4-6k range I'm sure there are better cams.
How about the new Andrews 48? Any good news about it yet? Maybe that question is best left to another thread.
Tourer
Joined: Apr 2010
Posts: 339
Likes: 199
From: NE PA
Here's my 103/255 dyno sheet. You can see the torque curve falls off dramtically above 4.000 RPM. The butt dyno doesn't feel the roll off though, it feels like it keeps pulling hard up to redline. It would be great to have the torque not roll off, but the 255 cams definitely have it where you live on the street.
Road Warrior
Joined: Mar 2008
Posts: 1,783
Likes: 10
From: Oh
[QUOTE=iclick;6868448]The 255s provide a flat torque curve all the way out to the redline (6250), but their forte is between 2000-4500, IMO. Some think they "hit the wall" at 4500 but this is not the case, as they make more HP than stock and pull all the way out, just not as much above 5000 as most other performance cams.
That statement doesn't seem to hold true as the dyno results posted by "Clump" show them dumping the TQ at 4k. I have seen other dyno's showing the same. Any cam is going to make more HP than stock. If you want to feel power, ride a bike that shows the TQ flat out to redline with the HP continuing to climb. It's the HP that gets you there quicker. JMO
That statement doesn't seem to hold true as the dyno results posted by "Clump" show them dumping the TQ at 4k. I have seen other dyno's showing the same. Any cam is going to make more HP than stock. If you want to feel power, ride a bike that shows the TQ flat out to redline with the HP continuing to climb. It's the HP that gets you there quicker. JMO
Thread Starter
|
Outstanding HDF Member
Joined: Jan 2007
Posts: 2,598
Likes: 19
From: Naples FL / Pine TWP PA
[QUOTE=smokindave;6869291]
I agree with smokindave, I keep bouncing off the rev limiter because I'm there that fast. I do not feel the roll Clump's dyno sheet shows. I'm sure I'll stop hitting the rev limiter once I get used to this cam but I can honestly tell you I don't feel a power roll off. I wonder what these folks are running with this roll off are running for pipes, air cleaner, and tuner? I'm betting my dyno sheet won't peak like that.
The 255s provide a flat torque curve all the way out to the redline (6250), but their forte is between 2000-4500, IMO. Some think they "hit the wall" at 4500 but this is not the case, as they make more HP than stock and pull all the way out, just not as much above 5000 as most other performance cams.
That statement doesn't seem to hold true as the dyno results posted by "Clump" show them dumping the TQ at 4k. I have seen other dyno's showing the same. Any cam is going to make more HP than stock. If you want to feel power, ride a bike that shows the TQ flat out to redline with the HP continuing to climb. It's the HP that gets you there quicker. JMO
That statement doesn't seem to hold true as the dyno results posted by "Clump" show them dumping the TQ at 4k. I have seen other dyno's showing the same. Any cam is going to make more HP than stock. If you want to feel power, ride a bike that shows the TQ flat out to redline with the HP continuing to climb. It's the HP that gets you there quicker. JMO
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Road Warrior
Joined: May 2010
Posts: 1,348
Likes: 52
From: Central Illinois
I agree with smokindave, I keep bouncing off the rev limiter because I'm there that fast. I do not feel the roll Clump's dyno sheet shows. I'm sure I'll stop hitting the rev limiter once I get used to this cam but I can honestly tell you I don't feel a power roll off. I wonder what these folks are running with this roll off are running for pipes, air cleaner, and tuner? I'm betting my dyno sheet won't peak like that.
Cruiser
Joined: Sep 2007
Posts: 207
Likes: 0
From: Dallas / Ft. Worth, Texas
My dyno sheet for my 2007 FLHS shows that torque begins to fall at 4000 RPM, but not nearly as precipitously as Clumps. I'm running the SE 255s in a 96 inch motor with SERT, SE slipons, and 2009 exhaust pipes. While I will occasionally visit the land of "Above 4000," I live in the land of "Below 4000."