Hello fellow Harley owners,

I own a 2015 RGS with an SE Air cleaner, Rinehart true duals with the 4" slip ons and the SEPST. After much research I am leaning towards the Andrews 57H cams but my local dealer is recommending the SE259 cams. I believe my current add ons are pretty standard so there's likely some real world numbers floating around for each cams.

My apologies if this has been answered before. I have read through the various cam threads for hours but haven't seen too many people using the SE259 without doing head or piston work.

 

Your bike weighs 813 pounds without you or your stuff on it. Is a couple of horsepower really going to make a difference?

 

Not a bad question, interested as well.

 

My '15 Limited Low has the 57s, K&N filter in stock housing, V&H Power Duals and Twin Slash Round muffles.... got 84/98 with a canned tune. Others I've seen with a good tune add maybe 5 to each side.

One word of caution.... the 57 is a noisy cam. Not top end noise, intake reversion noise. That's why I kept the stock AC housing, the sound was too much. Sounds like the butterfly klacking open & closed, but it's not the butterfly.
__________________________________________________ ____
For ROCKOUT information & purchasing please click the LINKS below...

 

The 259 has a intake closing is 47 and the 57's closing is 38, big difference in low in Tq.

 

If you like the 57H, (for which some recommend head work), but don't want to get into head work to optimize the cam, maybe consider the SE204.

The 204 is a drop in and will even out torque throughout the RPM band,, yes, taking some torque away from lower RPM ranges in the process. The result of the simple 204 install will be a slight reduction in your stump pulling low RPM torque in exchange for meaningful acceleration in 6th gear and a beautiful sounding lope at idle. You'll be in the cam's optimal range at RPM's above 2800.

If you're a rider who likes to lug his engine, stay away from the 204. If up-shifting at 3 grand and above is your thing, you'll be a happy camper on this cam.

BTW, I have the same intake and SEPST as you. The SEPST has a map specific to the 204, just so you know.

 

The decision depends on :
1- Has your bike been tuned properly? Most tuned Rushmore pipes/AC ~105 TQ 85 HP ±3
2- How you ride-
How many times do you hit the rev limiter in a normal ride?
Do you spend most of your time below 3500 RPM?
Do you prefer to stay low (1500-3000) mid (3000-4500) or high (4500-6000)
Look at dyno graphs from bikes with the mods you are considering to get a glimpse of what the WOT curves look like, and decide if they match your riding style.

 

What he said. Rush 2-1 (not the wrath), SE big air kit, TTS... 82/102 on a conservative 91 octane tune.

 

Neither is a great choice in your situation. The 57h's are a better choice than than the 259's.

 

2015 RGS is 845lbs wet not including passengers or cargo.