Hello
I have a 2015 ultra 103 twin cooled with v/h powerduals and 4.5 ho pipes. Have se heavy breather
did se stage 4 with a tts mastertune.
dyno numbers run 106.55 max power @ 5908.18 rpm and max torque 107.90 @ 4674.35 rpm
my question is would I be better off with the 585 cams or should I stay with the 259 cam
I usually ride between the 2000 to 3000 rpm range
open to some honest opinions as I know nothing about cams
Thanks

 

Don't know much about OEM cams with the SE 204 being the exception. However, looking at the cam specs, the 585 intake closes at 36* compared to the later close of 47* for the 259e. So, there could be an issue the the associated increase in compression (CCP) with the 585, not sure but worth checking. Of course, a second dyno tune will be required. If not locked into HD cams, there are aftermarket options that might be a better replacement.

 

Not sure I'm locked into hd cams - looking for advice as this is all new to me
I've seen different cam options however I know nothing about them - I'm thinking that I would be better off with the hp and torque @ the lower to midrange
As I usually am turning the rpms around the 2000 to 3000 rpm range -

 

For the best low end and midrange torque ya can't beat the SE-255 cams. In my 07 Dyna, SE-255 and 105" big bore 10.5:1 forged pistons, I'm getting 205 psi cranking pressure with a corrected (stock heads) compression ratio of 10.2:1. Don't know your CR, so ya might need compression releases.

 

I went 117 on a 2014 CVO Limited, and had the 585 installed instead of the 259e that came with it. Torque was pretty incredible, over 100 at 2250RPM and a nice flat curve running around 120+ from 2750 until around 5000. This worked in building torque for me, and it was what I was after. Getting on the freeway with that bike was fun.

 

That sounds about what I was looking for - did the se stage 4 but it has the 259e cams so changing them out to the 585 sounds like a good idea
thank you so much for the reply!
was hoping I wouldn't have any problems with changing out the 259 cams to the 585 instead

 

I disagree. Maybe for HD cams. But if I were so inclined to go with torque cams that limited my power to such low rpms, there are way better than those heat monsters.
I highly suggest you go aftermarket if at all possible. Most SE cams flat out suck with the exception of the 204s as was said but even those have their own set of issues.
But then I would've never done a stage kit in the first place. Not very impressive numbers for the $$$ involved.
I've smoked two 110CVOs w/255s now with my 103 w/S&S 570s, a .030 head gasket, and a gearing change because I put just as much torque to the rear wheel off the line and still make power to 6000rpm.

 

I did a quick compression comparison between the two cams based on a current true 10.5 static compression and 85cc chambers which, IIRC, includes the CNC ported OEM heads; kit PN is 92500018A? The OP would have to check actual compression to establish a true CCP and go from there.

The results from the comparison show that the 585 would bump corrected CR from 9.4 to 9.8 and CCP from 197psi to 208 psi. which, with a good tune and compression releases is manageable. My current 98" motor runs fine with corrected CR of 10.2 and CCP of 212psi, so I speak from experience.

Now the disclaimer. The OP would need to verify current CCP, deck height, head gasket thickness and chamber volume to run his own comparison but, from a quick comparison, replacing the 259e with the 585 looks to be a manageable swap done correctly.

 

Thanks to all that have replied!
I'm Not a harley wrench- no nothing about doing engine work
I live in vt where there is limited resources as to who does hd engine work so I have to rely on my dealership so I took the plunge on the se stage 4 - no complaints as I knew it was going to be pricey
now with that cleared up as to why I did the stage 4 - the only thing that I was questioning is the cams and feeling the power on the low-end of things - I have no doubt that the power is there but just on the higher end
since I usually run between 2000 to 3000 rpms i was thinking that maybe I should have the power and torque on the lower to midrange
Here is the dyno chart with the 259 cams - 2015 ultra limited 103 twin cooled stage 4
again - I'm not a hd wrench and have my reasons for the se stage 4 - good for those that wouldn't have done it to begin with but some of us have limited options

 

I had the 259 cams in my 110 and now I'm running the S&S 585G cams. If you like to run lower rpms, the 259 is a good choice. The 585s sit and run best above 2800rpm and keep pulling into the high rpms. I ran around 2400rpms in most gears with the 259s and the 585s are around 3000rpm in their happy zone.