can we wake up this 103
Tourer
Joined: Aug 2008
Posts: 364
Likes: 0
From: pennsylvania
You need to add some compression, get the heads flowing, and put a cam that will work with the combo. You already know that.
The 555 is a good cam and is the cam of choice for the Fuel Moto 107" kit. Pretty good results reported for that combo. Add heads to it and another 10/10 seems to show up.
I'm running a science project 103" with CP flat top pistons, Head quarters heads, TMan 590 cams, stock throttle body/injectors, and a Road Rage pipe. Getting 114/120 with a really good tune.
Your goals can be reached. Stick with a proven package from FM, Tman, Headquarters, etc. Best way to achieve your goal.
Zach
The 555 is a good cam and is the cam of choice for the Fuel Moto 107" kit. Pretty good results reported for that combo. Add heads to it and another 10/10 seems to show up.
I'm running a science project 103" with CP flat top pistons, Head quarters heads, TMan 590 cams, stock throttle body/injectors, and a Road Rage pipe. Getting 114/120 with a really good tune.
Your goals can be reached. Stick with a proven package from FM, Tman, Headquarters, etc. Best way to achieve your goal.
Zach
Stellar HDF Member
Joined: Nov 2004
Posts: 3,156
Likes: 41
From: So Cal
Ive been looking at the Se 254e cams vs the Se 255. Based on the SE catalog description of the cam the 254e is a low to mid range cam, "equal bikes with the 254e and the 255 in a 1/4 mile run the 254e wold win", this is per the SE catalog. Imay be that for what you are looking for you need more mid range and the Woods or SE 255 would have been a better choice.
A tune goes a long way on our FI Bikes and if I were you before pulling it down again Id get it on a dyno and get it properly tuned. The HD download from the dealer is leaving a lot of Hp/Tq behind and a good tune may be all your missing.. Rememebr the HD Download is a EPA compliant lean tune.
A tune goes a long way on our FI Bikes and if I were you before pulling it down again Id get it on a dyno and get it properly tuned. The HD download from the dealer is leaving a lot of Hp/Tq behind and a good tune may be all your missing.. Rememebr the HD Download is a EPA compliant lean tune.
1: Run those TW555 cams along with some 10.5 pistons, and clean up your heads. That will get the numbers up where you're wanting them to be. Scott at Hillside has a good stage II head package that works well with those cams.
2: Swap out your 32t trans pulley for a 30t pulley from a tri-glide, and plug those final drive numbers into the ECM via your tts, and your speedo and cruise will work normally.
Getting the motor working a little better is the first step, but you also have to address the too-tall gearing if you're wanting a good stop light-to-stop light runner.
2: Swap out your 32t trans pulley for a 30t pulley from a tri-glide, and plug those final drive numbers into the ECM via your tts, and your speedo and cruise will work normally.
Getting the motor working a little better is the first step, but you also have to address the too-tall gearing if you're wanting a good stop light-to-stop light runner.
Last edited by Mike; Oct 7, 2011 at 11:24 AM.
Seasoned HDF Member
Joined: Dec 2005
Posts: 5,465
Likes: 625
You have two of the elements to a great package, the TTS and the 555 cams. My 103 limmited runs very well with TTS, AC, and 255 cams, but it sounds like you want more.
My recipe would be- Install the 555 cams, pull the heads and have the CCs reduced a bit for proper compression with the right gasket to get the piston to head clearance down under .035/.040, and do a great multi angle valve job and minor porting to wake this thing up. Then to offset the loss of torque in the real low rpms, (1800 to 2400) I would put in a 30 tooth front sprocket and shorter belt. That will also really help in the overall performance of the bike, but your rpms will rise 6 percent in each gear at the same speed. You may also have issues with the 6th gear indicater and speedo, so check for solutions there. Exhaust you might consider a non catted head pipe like Fuelmoto sells.
The 103 is so close to the 107 in size, that you can pretty much figure you will match the "555/107 kit" with the head work really helping up top, to the point of matching or maybe even making a bit more hp than a 107/555/stock head motor. As far as tuning, there may be a file available for the combo I laid out here on the TTS web site that is close enough for starters, but you better check with some people more knowledgeable than me.
I found a file that fit my combo, and it did work out very well.
I wouldn't mess with dyno tuning till you finalize your plans. Waste of time and money.
My recipe would be- Install the 555 cams, pull the heads and have the CCs reduced a bit for proper compression with the right gasket to get the piston to head clearance down under .035/.040, and do a great multi angle valve job and minor porting to wake this thing up. Then to offset the loss of torque in the real low rpms, (1800 to 2400) I would put in a 30 tooth front sprocket and shorter belt. That will also really help in the overall performance of the bike, but your rpms will rise 6 percent in each gear at the same speed. You may also have issues with the 6th gear indicater and speedo, so check for solutions there. Exhaust you might consider a non catted head pipe like Fuelmoto sells.
The 103 is so close to the 107 in size, that you can pretty much figure you will match the "555/107 kit" with the head work really helping up top, to the point of matching or maybe even making a bit more hp than a 107/555/stock head motor. As far as tuning, there may be a file available for the combo I laid out here on the TTS web site that is close enough for starters, but you better check with some people more knowledgeable than me.
I found a file that fit my combo, and it did work out very well.
I wouldn't mess with dyno tuning till you finalize your plans. Waste of time and money.
The only word of caution I would give is relative to the piston deck height that the Moco 103" comes with. Some of the early 96" had cylinders .008 or more down the hole. My 96" was .008 frt and .010 rear. You can improve the squish some with a thinner gasket, but ideally you want the piston at zero and use the gasket to create optimum squish.
I don't know what the FM kit comes out at, but I suspect it is zero deck height and a .030 or .035 MLS gasket.
Optimizing your squish will make a couple more point performance, but it really helps get a more complete burn and resists detonation.
I also agree with the 30 tooth trans pulley upgrade. I did it and am very happy with it. Acceleration becomes instant in 1st - 3rd. Very easy to hit the rev limiter if you're not paying attention.
JMO
Zach
Stellar HDF Member
Joined: Apr 2009
Posts: 2,191
Likes: 843
I have 2011 road king with a 103 in it. this is my first fi Harley !i have had 1-80shovel 1-80 evo and 1 -88evo now a 103 twin cam and I think this thing is the biggest slug I have owned ! I am at my wets end the dealer has put the se254e cams in the se stage 1 ac Vance and Hines power duels with there twin slash rounds and the download for the cams and pipe/ac combo it is somewhat beater but not what it should be I am ready to pull the heads and get some work done . I need your opinion as to what would you do in my shoes . I had a frend give me a wood tw555 cam set trying to help me out but is this the way to go ??? I ride hard lite to lite looking for that pull hard toque when the wife is not with me .when she is and I try that I get hit in the helmet a lot 
if you know what I mean . tq in the 115 + and hp 100+ with the flattest toque curve possible 2000-5000+ rpm . am I off my rocker or can this be done ?? the cam that is in the bike spec lift I .535/e.536 duration @.053 i224/e234 timing i-01atdc/43abdce50bbdc/04atdc tdc lift .094/102 the woods cam is lift i-555/e-555 duration @.053 242/242 timing intake 20/41 ex-42/18 tdc lift in .189/ex178 please what can we do here I would like this to be the last time I do work to this bike
i have just got a tts mastertune and have a good tuner in mind but good porter??? please let me know what you think
thanks
if you know what I mean . tq in the 115 + and hp 100+ with the flattest toque curve possible 2000-5000+ rpm . am I off my rocker or can this be done ?? the cam that is in the bike spec lift I .535/e.536 duration @.053 i224/e234 timing i-01atdc/43abdce50bbdc/04atdc tdc lift .094/102 the woods cam is lift i-555/e-555 duration @.053 242/242 timing intake 20/41 ex-42/18 tdc lift in .189/ex178 please what can we do here I would like this to be the last time I do work to this bike i have just got a tts mastertune and have a good tuner in mind but good porter??? please let me know what you think
thanks
Great prices and top notch.
Tourer
Joined: Aug 2008
Posts: 364
Likes: 0
From: pennsylvania
T-Man performance has some very good cams, IMO. I am very happy with his cam and head work. And his products are top notch!
Road Warrior
Joined: May 2009
Posts: 1,945
Likes: 4
From: Victoria, Australia
Those 255's would fit the OP's needs to a "T", as his stated interest is in "light to light" performance. I can' think of a better fit; and same to you for where you are as well.
255's a re a pretty decent cam, but I would recomend the 251's if you want to stick with SE products. The 251's have better low end and midrange pull and it carries longer in the RPM's
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Novice
Joined: Sep 2011
Posts: 16
Likes: 0
From: richmond
From what i have heard that the Harley head gasket is .045 and the 103 is 9.6-1 cr there is no base gasket just a o ring. i don’t know i have never had a tc apart yet!! so in my thinking if the piston is down in the hole .002-.008 the only way to get a 0 deck is to mill the jug ???? i know with a evo you change out the base gasket for a smaller one or none at all to get piston to head at .030 for optimum squish . We will not know until i tear it down and check. for me the frustration comes in with the fuel injection i am old school read the plugs and change the jets guy .as the 30 tooth tranny pulley i got one for the old bike 86 fxstc 5 speed, have to see if it will work on the new one got to pull the outer primary to change the clutch spring anyway. It looks like the tw555 is a will liked set by most i got and it don’t take that long to put it in. but i really think i will see if we can do a dyno pull soon not to tune it just to see where it’s at and post it
Thanks guys the info is grate
Thanks guys the info is grate
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Novice
Joined: Sep 2011
Posts: 16
Likes: 0
From: richmond
well just got back from my dyno tuners place he did 4 pulls on the bike and checked timeing ,afr,and more with the v&h power dules head pipe , twin slash round mufflers ,se stage 1 ac se 254e cams and the download for the cams it made max tq 95.73 and max hp 80.58 at the cost of $4,000 form what i have been told that about 2 points from stock i my be rong but i would have like some more power to doller figer . now i think i am going to pull the heads get a good valve job and the ports cleened up try to get the squish about .030-.035 with luck and take about .015 off the deck to get the cr up some and put the tw555 cams in and good tune . i hope this works