103ci performance upgrades
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1st Gear
Joined: Sep 2012
Posts: 5
Likes: 0
From: Mays landing nj
103ci performance upgrades
trying to get some opinion out there. i am thinking of putting a set of cams in my 12 103. just looking for some imput on any performance mods that you guys did, and the results. i hear that a set of cam shafts, full exhaust, air cleaner, and upgraded tuner of some sort really wkes them up. any input?
Cruiser
Joined: Oct 2007
Posts: 175
Likes: 0
From: Wild&Wonderful West Virginia
If you are looking to upgrade your cams take a look at what Headquarters have to offer. They are many good choices out there so check them out. Also a fuel management system would be wise to add along with a high flow air cleaner and and an exhaust that breathes.
Stellar HDF Member
Joined: Aug 2012
Posts: 2,664
Likes: 184
From: Indiana, USA
IMO your biggest bang for the buck is Stage 1 with just mufflers and free flowing air cleaner. Next is the big bore cylinders and flat top pistons folowed by high compression pistons and to really wake it up you need to enhance flow through the heads with either purchased or having yours reworked. Everything I have mentioned is in the top end and does not require opening the cam chest. If you go with forged High Compression pistons, a good set of cams will enhance what you did in the top end. Also you will find you can only run so much lift with the stock springs in your stock heads so again heads before cams. I have added cams to 2 bikes and only after adding the high compression pistons. If you look for published data you will find the most agressive cams you can run with your hydraulic pistons will only gain you about 10% HP and Torque.
Tourer
Joined: Aug 2006
Posts: 498
Likes: 28
From: Iowa
I have a 2012 UC. I do two up touring and pull trailer so I was motivated to increase torque.
I went with Supertrapp 2 into 1, Power Commander V tuner, SE stage 1 air.
Then I had it Dyno'd at Fuelmoto.
I was going to get a cam but have been satisfied with the above mods so am going to not get one right now.
I had narrowed my choices down to either the SE 255 or the Andrews 48H, but these are torque cams and may not be what you need for your style of riding.
I went with Supertrapp 2 into 1, Power Commander V tuner, SE stage 1 air.
Then I had it Dyno'd at Fuelmoto.
I was going to get a cam but have been satisfied with the above mods so am going to not get one right now.
I had narrowed my choices down to either the SE 255 or the Andrews 48H, but these are torque cams and may not be what you need for your style of riding.
Seasoned HDF Member
Joined: Sep 2012
Posts: 36,305
Likes: 3,157
From: Jacksonville
I have a 2011 Street Glide with a 103 and have not done the cams yet, but did the rest. Very happy. No numbers to give but it definitely makes it more responsive. Had a 04 Road King with the 96ci with the same mods and what a difference between 96 @ 103.
Ultimate HDF Member
Joined: Mar 2012
Posts: 6,129
Likes: 143
From: Santa Cruz
After exhaust-A/C-tuner, Cams are the next step. If ya only want lowend the SE255s would be the choice with stock compression. Andrews has a new 57h cam for stock 103 I'd take a hard look at. I put 54h cams in my mild 103 build but did up the compression. I'm happy with them for the way I ride.
Tourer
Joined: Mar 2008
Posts: 413
Likes: 7
From: Oklahoma
I was thinking of something myself, but I was thinking about getting my stoke head flowed and ported larger valves.....see waht that does before I put cams in it.....which the cam route would be cheaper. But in the end if I add cams the heads are already done
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Grand HDF Member
Joined: Dec 2007
Posts: 4,999
Likes: 55
From: Bay Area
I dont think that route is going to work without bumping up the comp, replacing cams at the same time. You will get too much air flow that your engine wont handle. It all has to be balanced and done at the same time except for a cam.
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Road Warrior
Joined: Aug 2006
Posts: 1,575
Likes: 7
From: Wisconsin
If I were you, I would start by calling this number and asking for a guy named Jamie.
920-423-3309 Tech/Support
Tell him you are interested in cam shafts, full exhaust, air cleaner, and upgraded tuner of some sort. Ask him lots of questions and be prepared to tell him specifics about what kind of riding you do and your preferences with regards to the looks of the bike and sound. He'll do a good job for you.
Good luck.
920-423-3309 Tech/Support
Tell him you are interested in cam shafts, full exhaust, air cleaner, and upgraded tuner of some sort. Ask him lots of questions and be prepared to tell him specifics about what kind of riding you do and your preferences with regards to the looks of the bike and sound. He'll do a good job for you.
Good luck.
Road Warrior
Joined: Dec 2010
Posts: 1,699
Likes: 7
From: New Jersey
If I were you, I would start by calling this number and asking for a guy named Jamie.
920-423-3309 Tech/Support
Tell him you are interested in cam shafts, full exhaust, air cleaner, and upgraded tuner of some sort. Ask him lots of questions and be prepared to tell him specifics about what kind of riding you do and your preferences with regards to the looks of the bike and sound. He'll do a good job for you.
Good luck.
920-423-3309 Tech/Support
Tell him you are interested in cam shafts, full exhaust, air cleaner, and upgraded tuner of some sort. Ask him lots of questions and be prepared to tell him specifics about what kind of riding you do and your preferences with regards to the looks of the bike and sound. He'll do a good job for you.
Good luck.