Dyna S Lounge: FXDL-S
Cruiser
Joined: Jun 2016
Posts: 128
Likes: 22
From: Marina, CA
I miss the food, but the weather out here is so much better. Riding easily all year on the coast here, I'm about to head to the Legion post in a few for our monthly riders meeting. So many chapters put it up for winter, we just put on a jacket.
Advanced
Joined: Jun 2016
Posts: 81
Likes: 13
From: VA
I am not sure what the 2-2 numbers should look like, but I think that your tuner used STD as a correction factor over SAE because the numbers are so low. It is crazy to think that 10whp and 13ftlbs is lost from chosing a 2-2 instead of a 2-1. Fuel is solid and curves are clean so from first look it must be the case.
Club Member
Joined: Apr 2016
Posts: 11,453
Likes: 8,280
From: Inland NW
I am not sure what the 2-2 numbers should look like, but I think that your tuner used STD as a correction factor over SAE because the numbers are so low. It is crazy to think that 10whp and 13ftlbs is lost from chosing a 2-2 instead of a 2-1. Fuel is solid and curves are clean so from first look it must be the case.
Tourer
Joined: Jun 2009
Posts: 422
Likes: 6
I am not sure what the 2-2 numbers should look like, but I think that your tuner used STD as a correction factor over SAE because the numbers are so low. It is crazy to think that 10whp and 13ftlbs is lost from chosing a 2-2 instead of a 2-1. Fuel is solid and curves are clean so from first look it must be the case.
Advanced
Joined: Jun 2016
Posts: 81
Likes: 13
From: VA
I am not surprised it runs awesome with the linear tq/hp curves along with locked in fuel. I knew that a 2-1 is better for power, but a 10 whp difference simply from exhaust selection is honestly shocking to me. Is this common with HD motors? Coming from newer sport bikes I am not use to seeing such a number difference based solely on exhaust selection.
Tourer
Joined: Jun 2009
Posts: 422
Likes: 6
I am not surprised it runs awesome with the linear tq/hp curves along with locked in fuel. I knew that a 2-1 is better for power, but a 10 whp difference simply from exhaust selection is honestly shocking to me. Is this common with HD motors? Coming from newer sport bikes I am not use to seeing such a number difference based solely on exhaust selection.
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Cruiser
Joined: Jul 2016
Posts: 169
Likes: 48
From: North Florida Panhandle
I didn't get the Dyno Sheet when I picked it up, nowhere to carry it,
I'll pick it up when I go up and pick up all the parts I have ordered and post it then. I don't think the numbers are as good as lowboy72 though.
Cruiser
Joined: Jun 2016
Posts: 128
Likes: 22
From: Marina, CA
The scavenging of the 2-1 is what boosts the numbers, with 110 or 117ci out of only 2 cylinders with 2 valves per cylinder we need all the help we can get.
*** dyno will feel the difference, and the real dyno will verify. Also running a stepped pipe like the Bassani will help in many cases as it will keep the velocity up to maximize scavenging.
The scavenging also allows for a more precise, and more powerful, tune by providing a fresh and consistent charge with each combustion event as opposed to spent gasses remaining to varying degrees based on RPM and load.
*** dyno will feel the difference, and the real dyno will verify. Also running a stepped pipe like the Bassani will help in many cases as it will keep the velocity up to maximize scavenging.
The scavenging also allows for a more precise, and more powerful, tune by providing a fresh and consistent charge with each combustion event as opposed to spent gasses remaining to varying degrees based on RPM and load.
