Thanks for the info texasrich27, maybe thats why HD says the 254E is a good cam for 2011 model 103s the higher (not by much) compression might make the difference, but still food for thought
But like ColoSpgsMark i'm still interested in them, then thewholehog throws in the link to the 204 cams and by that dyno sheet they look great and the guy is very happy with them, i ride to suit my mood and road conditions sometimes i like to just cruise along enjoying the views and other times i like to screw that throttle on and have some fun normally a mixture of both, thats why i like this forum you get all different thoughts on the same subject and some of it you might not of thought about it at all till someone mentions it, pity not more dyno sheets around to compare all the options but then in the end i'm not after the best numbers available but a sweet bike to ride

Regards
Big Pete

 

I just went with the 254e kit on my Limited. I previously had an Ultra with the 103 stage II with the 255's. The Ultra would ping when hot in areas where high Octane fuel wasn't available. It also put the hurt on the starter/compensator as I didn't have compression releases. Pulling lots of timing out of the tune might have helped this, but at the expense of the low end power I was looking for.
I chose the 254e this time as it has a lower cranking compression and should not subject the bike to low end knock when hot or on crappy gas. The gas is something to consider if you go touring in places you are not familiar with.
The dyno result on my Limited with the 254's is great. I gave up a couple of foot lbs at very low rpms and gained quite a bit at the higher rpms over the 255 equipped bike. They don't drop off the torque curve as early as the 255's. The gain at midrange is greater then the slight loss of very low rpm torque. For now I am very happy with my choice, but we will see when I get to ride it more when the weather improves.

 

Sounds like both the 254s or the 204s would be great cams. I wonder if anybody here has experience with them on the same bike.

Ride safe,

Bob.

 

Have the 254 cam in my bike now, a 2010 flhtk sorry can't post a dyno sheet. It made 94hp and 102tq the tq peaked at about 4100 and the hp at about 5700 rpm. The pipe is a V@H power duals with Bassani slip ons and a Zippers ac.

 

I have read thru this thread and didn't notice much said about the #####'s NEEDED (Specks) for any of the cams talked about. Listing CAM Specks are needed for Easier understanding of the CAMs to compare.

IF you look at a "cam" Just to see what it will do at Low RPM Torque , LOOK at the intake Close Numbers.
YES there is More than that to look at, But this will get you started in the right direction..

The 254e/255 , Can some one Post the Numbers on the 254e cam please.? I don't have them..
The SE255's Lift at .550 on both sides
Intake.... 6.0* open and CLOSE at 25*
exhaust.. 48* open and close at 7*
If you look Just at the closing of the intake valve, the 255's close very early at 25*(many early torque cams close at 30* or a little more)

This tells me that the 255 cam will make More compression at this early close and RPM band is early for them com'n ON. ALSO tells me It will POOP-OUT earlier on the RPM band..

This CAM is what I am looking for on the 96" motor Not so much on the 103" motor.

255's Not the best cam for the 103" engine Because the 103" makes MORE Compression than the 96" Low Compression motor... SO the better cam need Should Close Later than 25* More like 30* on the intake to make up the difference(103 higher comp.) and LOOSE some of that Too High compression.

We're not talking really HIGH compression but with the 103" and 255's the pressures Will be a little more than MOST riders want.. Pressures coming in at 10.2 area... you will/may find ccp of 200 lbs Not the best for streeable bikes. keeping these pressures about 190 or less Much Safer for Most bikes and will run better.

Using the 255's on a 103"(stock):
If you don't use the Highest Octane and or have the iNSTALLed pressure relief valves into the heads, On short stops Like Fueling the bike and restart while still HOT,,,, the added compression CAN BOCK back at times and damage can result..(hard starting/banging starter clutch gear)

Some riders know How to control the added Compression (too much for some).
I have no problem with using the eXtra Compression as it ='s POWER..

I have a compression addiction.

I have the 255's in my fully staged one 09 FLHR. WHEN I plan to go 103" in a future time as I get some wear out of the 96" pistons and cyls. other parts will come into play here (+-4* gear)...

I can't see putting good pistons and parts (96") on the shelf and sit there collecting dust, like so many already are.

If a biker installs the SE255's and LATER goes 103" like me, the +-4* gear will do a good job here..

It can change the cam to close Intake at 29* instead of 25*.... dropping the compression quite a bit, enough to get piston pressures under 200#

BUT 4* does also change out the eXhaust side and i need to do some more THOUGHT there to see IF and Whats..

If you look at the Lift of a cam and then compare the closing * of the intake valve, you will have a GOOD idea of the cam in question...

I prefer on the Big Bikes that the intake valve close Not be more than 34* MAX and the Least is 25* and that 25* is Very early..... Important to look at What Compression level the cam calls out for.(.)

I see other cams with More duration and could use these BUT every time you change "one" area of the cam-timing other ISSUes come into play:::

Need for MORE compression with the Bigger numbers on Later Closing intakes or trading for Higher RPM Band for WHEN the power is there..

It takes a lot of GOOD planning when building an engine and the parts used Have a purpose = to One Another. or the should have.

Then you have to take in ride styles,,,,, A very Big and differs from one to another.

Hope this Rant helps some of you.

signed....REDHEAD

 

RedH - here are specs for the SE254E Lift@valve Intake/Exhaust 0.535"/0.536 . Duration@0.053 Intake/Exhaust 224"/234". Timing @ 0.053 lift open/close Intake 01* ATDC/43* ADBC. Exhaust 50* BBDC/04*ATDC.... hope it gives more info.. i have no idea what letters are for after degree values..... TDC Lift@valve intake/Exhaust 0.094"/.102"

 

2010 FLTRX
103"
CNC PORTED HEADS
10.5:1
SE-254e CAMS

Stock 96" with Air Ventilator and Jackpot Racing 2:1 the bike made 69hp 79tq.

Build is complete and bike was eased up onto the Dyno this afternoon.

Few easy miles and pulls, tomorrow the fun begins.

Stay Tuned...

 

Big Pete, thanks for originally posting the 254E cam question. I'm looking forward to real-world impressions from those who have responded.

 

Yep me too Padrel looks like couple more members are trying them now and hope to get more feedback on 254E cams, been reading the comparison Fuelmoto has done between the SE255 and the woods Tw555 cams very interesting comparison and great for Fuelmoto to do it and post it on these forums, makes me wonder how the SE254E would compare against the 555 cams as well
but those SE204 cams do show as a great cam for the 103, engine decisions decisions :-)

 

subscribed