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As the owner of that bike, I can tell you that it's an entertaining build. You're not turning balancers like I am, so I'd think you could get right around that 120/120 point. We'll see how I feel in a year, but I can't really see needing more than what this build delivers. On a light bike like a Softail or Dyna, this is a rockin' combination.
__________________
'05 Vivid Black Night Train
Lots 'o black
103 by Dave at JD's
116.70/116.01 SAE
Thanks for all the great responses. though now i am curious about going bigger if the cost is relatively the same. Does anyone know the cost range of upgrading to a 117ci? I would be interested in doing this upgrade though as i said i put on a healthy amount of miles, and want something that will support that and be dependable without having to break the motor down next winter to fix a bunch of issues. i want something with lasting durability that will give me the performance i am looking for, the one thing i have seen expressed is the dependability factor. To me, bigger is better, but only if it continues to perform for years to come. I dont want something that is going to give me a headache during a 3000+ mile ride. Or have to break it down afterwards just to keep riding. i am looking at spending between 4-5000 on this project, and will be adding new pipes, intake, etc, to whatever i biuld, I need this thing to be fast, loud and DEPENDABLE.
There's a reason you can get the HD cylinders so cheap....
Any decent builder will true these new cyls to .005 over pistons and eliminate that aspect. Anything else I need to know about them that should be of concern?
Ron
__________________ 07 Softail Custom
V&H BSS
Screaming Eagle Heavy Breather
Screaming Eagle Big Twin Compensator
Tmax
Harley Blade 41681-07 wheel
The puppy lasted until fall. Now in teardown mode for new build
Thanks for all the great responses. though now i am curious about going bigger if the cost is relatively the same. Does anyone know the cost range of upgrading to a 117ci? I would be interested in doing this upgrade though as i said i put on a healthy amount of miles, and want something that will support that and be dependable without having to break the motor down next winter to fix a bunch of issues. i want something with lasting durability that will give me the performance i am looking for, the one thing i have seen expressed is the dependability factor. To me, bigger is better, but only if it continues to perform for years to come. I dont want something that is going to give me a headache during a 3000+ mile ride. Or have to break it down afterwards just to keep riding. i am looking at spending between 4-5000 on this project, and will be adding new pipes, intake, etc, to whatever i biuld, I need this thing to be fast, loud and DEPENDABLE.
Your reasoning is sound in your selection. A big bore, low compression build will give great power and live a long time. Torque and power pretty much happen naturally without the need to force feed it out of the lower displacement engines to get the same result. Gentle valve train and lower compression live longer, usually.
Ron
__________________ 07 Softail Custom
V&H BSS
Screaming Eagle Heavy Breather
Screaming Eagle Big Twin Compensator
Tmax
Harley Blade 41681-07 wheel
The puppy lasted until fall. Now in teardown mode for new build
make sure its true,and weld it.have someone weld thats done it,when we do it,we dont use any rod,just marry the 2 metals together,not to affect any balance factors
kirby
vee twin racing
A 107" build, built right, will get close to the numbers you want and cost less. Any upgrade in displacement would justify having the Hoban treatment to the crank. So, once you do that, you are not looking at a significant difference to go as big as you want.
However, something not often mentioned when talking about a "big" build is the overall impact on rideability. Along with big displacement comes more vibration and more engine heat. A large displacement engine can over power the frame that was not designed for 130 foot pounds of torque, not to mention the additional strain on drive belt, starter/battery, clutch, engine mounts, primary mechanics, etc.
I have nothing against large displacement builds, one of mine is an all bore 107" and has more power than I can really use. If you have never been around or ridden a large displacement build (I don't consider 107 a large displacement build) you might want to check one out before you go down that road. Since you have emphasized DEPENDABILITY, I think it is fair to say that the duty cycle of certain components will be shorter in a big build than in stock configuration and that stuff is more likely to break in a big build than in stock configuration.
Not trying to talk anybody out of a large displacement build, just pointing out a few things that often go unmentioned. The big engine guys may take exception to this but just something to think about.
The other question is, "how much do you really need?".
I went from 88 to 103. I picked up 45 horsepower and 40 lb-ft. I also spent more than $4,000-$5,000. I'm absolutely satisfied with my build. In hindsight, do I wish I'd gone 107 or 110 or 113 or 117? Not really. I don't have to worry about breaking belts or blowing apart my spoked wheels.
And seriously, it's a Harley, not a Ninja. I need something that can get me through the mountains with a passenger and luggage onboard.
Build it strong, and build it to last.
__________________
'05 Vivid Black Night Train
Lots 'o black
103 by Dave at JD's
116.70/116.01 SAE
07 Softail Custom
