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[happyman]

The 54 for a 103 is very much like the TW 37 was for 95"'s   easy on the valve train , broad power

the 54 comes on  several hundred  RPM later than say the  5-6.  the new bikes  like the ultra LTD are 900 lb bikes put two up amd load them down and  i  want the pull. there are some cams that may be a bit better  i feel .  ya cannot take anythig away from the  54 regardless if things are set properly.  in a lifghter bike  or if ya like to shift its very good,  Even the SE 259 does  pretty good   and it does pull bout like a  54 according to some of the dyno  runs i have seen.   just have to get the squeeze tight is all. have a 255  and i refuse to use it. i just don't caere for the cam.  i 

[timo482]

fundamentally the issue is this

you can make it have lots of power at the rev limiter...but that will lower power at 2500 rpm

or you can have lots of power at 2500 rpm - but at 4.5k or so it will run out..

the first thing you need to do is this - figure out what is most important - top full speed power? or power off a stop sign or passing a truck

you get ONE - not both...

what some folks do is put in a high rpm cam - then install a smaller trans sprocket and run in a lower gear most of the time to keep the revs up.

always think through what you really want and then the answer of what to do will come

to

[happyman]

fundamentally the issue is this

you can make it have lots of power at the rev limiter...but that will lower power at 2500 rpm

or you can have lots of power at 2500 rpm - but at 4.5k or so it will run out..

the first thing you need to do is this - figure out what is most important - top full speed power? or power off a stop sign or passing a truck

you get ONE - not both...

what some folks do is put in a high rpm cam - then install a smaller trans sprocket and run in a lower gear most of the time to keep the revs up.

always think through what you really want and then the answer of what to do will come

to

had that figured out a few years ago.. still looking for the    higher lift  cams that pull well doen low and don't have the issues of valve trin racket

[HD Street Performance]

OK so want to experiment?
I'll tell you what looks good on paper for just what you mentioned. Andrews native grinds have a conservative lift profile. Take a 54 and advance it 4 and use HD high ratio rollers. .590 lift good LC locations, opening and closing points look good and the intake close is now 38°. Could be a very "happy" motor and quiet.

[happyman]

OK so want to experiment?
I'll tell you what looks good on paper for just what you mentioned. Andrews native grinds have a conservative lift profile. Take a 54 and advance it 4 and use HD high ratio rollers. .590 lift good LC locations, opening and closing points look good and the intake close is now 38°. Could be a very "happy" motor and quiet.

think i will wait for them to come out with something  just don't care for the advance or retard keys.  would rather just get a cam that is already good to go.  there are a few out there but don't have the  higher lift i would rather have..    i do think the low lift cam  i have  will work just fine for what i am going to do with my  big heavy   LTD. thought i read on a couple forums there was  some more new cams to be introduced that were the cats meow??? haha

[Fullsac Performance]

OK so want to experiment?
I'll tell you what looks good on paper for just what you mentioned. Andrews native grinds have a conservative lift profile. Take a 54 and advance it 4 and use HD high ratio rollers. .590 lift good LC locations, opening and closing points look good and the intake close is now 38°. Could be a very "happy" motor and quiet.

Hey Don

I have a +4 gear on a 54 hitting the dyno next week. 

Steve

[HD Street Performance]

It looks good to me and even the high ratio rockers. Let us know how it does.

[happyman]

It looks good to me and even the high ratio rockers. Let us know how it does.

those  rockers are not  roller rockers are they?
would prolly be at that lift, be a good idea to use them??
never know ya may be onto something.  still i have been waiting  for something new to come out, am getting where i want to get my bike done so its ready to roll when weather comes around  again.

[HD Street Performance]

17396-08
I hesitate to say good to go. I would use them on my own bike, but I check geometry. The roller VS non-roller debate has been beat to death

[happyman]

on both sides or just intake?

[HD Street Performance]

Your choice, you get the set (4) from Harley.

[happyman]

i know they come in sets of 4 . have seen often times they do only the intake.   just checking

[HD Street Performance]

I am not real sure why you would want a high lift cam, say near or slightly over .600 with stock heads, the OEM not CVO versions? And the short high lift cam without terribly fast rates is available, one is the Tman 625. I would not use this in a stock 103 for your needs.
It would take back to back testing to see what works best 2 or 4 ratio rockers and based on what I know about the stock heads these rockers won't be a real winfall benefit in either case. The real benefit will be the area under the overall duration curve, not what happens from .555 to .590. In general the critical times for exhaust are overlap and the lower lifts <.400 as far as where the motor is in the exhaust cycle. Not nearly as much going on when that cam is at .555-.590 despite the fact the heads are not showing an appreciable flow gain there either, exhaust side.

[happyman]

understand.   was looking at the up to maybe 580 lift  with the early intake close  don't wan tor need  600 or higher lift.  of no value for what i will be doing on the bike.

[HD Street Performance]

You just described the advanced 54