The Saga Continues
The Saga Continues
Last year I posted a thread concerning power issues with a 103 upgrade. I received lots of great feedback from people who know a whole lot more than I do.
I waited to get the miles on the bike (then some) that the shop asked me to get before asking them to do anything else. While on a recent trip with a friend who also has an '07 but with only a Stage I upgrade, we both rolled on at 2500 rpm in both third and fourth gears. It was all I could do to keep up with him and he outweighs me by 50 pounds.
The mechanic agrees that the power is just not there and pulled the cams to make sure they were lined up according to their marks - spot on, compression at 180 psi each cylinder, and the plugs looked great with no appearance of fouling, even after nearly 5000 miles of use.
In short, bored and ported, Andrews cam, KB pistons, true duels, and PC III. 103 upgrade turning out 76 hp and 79 pounds torque on the duno run. Any ideas on what to look for next?
I waited to get the miles on the bike (then some) that the shop asked me to get before asking them to do anything else. While on a recent trip with a friend who also has an '07 but with only a Stage I upgrade, we both rolled on at 2500 rpm in both third and fourth gears. It was all I could do to keep up with him and he outweighs me by 50 pounds.
The mechanic agrees that the power is just not there and pulled the cams to make sure they were lined up according to their marks - spot on, compression at 180 psi each cylinder, and the plugs looked great with no appearance of fouling, even after nearly 5000 miles of use.
In short, bored and ported, Andrews cam, KB pistons, true duels, and PC III. 103 upgrade turning out 76 hp and 79 pounds torque on the duno run. Any ideas on what to look for next?
Outstanding HDF Member
Joined: Feb 2007
Posts: 2,710
Likes: 6
From: Spokane, WA.
So ,you went from a 96" to a 103" right?
what compression are you running 9.8:1 or better?
What Andrews cam profile are you running?
I am by no means a mechanic, but I would think that it needs some dyno time. My 103 build on my 07 FLSTF ( which I could not get dialed in with a thunder max) gave me 91 hp and 101 torque, I would venture to guess if I had put the SERT back on with dyno tune it would have showed better #'s
Just my .02 cents
what compression are you running 9.8:1 or better?
What Andrews cam profile are you running?
I am by no means a mechanic, but I would think that it needs some dyno time. My 103 build on my 07 FLSTF ( which I could not get dialed in with a thunder max) gave me 91 hp and 101 torque, I would venture to guess if I had put the SERT back on with dyno tune it would have showed better #'s
Just my .02 cents
Last edited by mgmmgm; Jun 25, 2012 at 11:14 AM. Reason: dyno sheet flstf
Good luck, hope you get it figured out, definitely you're losing some power somewhere...
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Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
Get rid of your TDs. They are killing your low/mid range torque. I had them on my S&S 107" and changed to a SuperTrapp Supermeg and picked up 15% more torque through the lower rev range. The bonus is my motor is much smoother and sweeter running, something it is difficult to put down to a change of exhaust, but well worth it IMHO.
My peak numbers are very similar, 1HP more with TDs, 4TQ more with the Supermeg, but it is the shape of the curve that matters more.
My peak numbers are very similar, 1HP more with TDs, 4TQ more with the Supermeg, but it is the shape of the curve that matters more.
Seasoned HDF Member
Joined: Apr 2006
Posts: 10,675
Likes: 95
From: Billings,Mt.
Something is not right.Maybe tuning/tuner issues?
Last edited by 1flhtk4me; Jun 25, 2012 at 12:45 PM.
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