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Is it the lighter flywheels that make the twin cam vibrate more than an EVO? My EVO shakes a little in my 99 Softail Custom, but no where near what you guys are talking about. I am plenty comfortable at 70 MPH and above for that matter. Just wondering.
well first off my motor is not stock by any means. I have plans on going further with the build this winter and want to try to squeeze every hp and tq that i can out of it.
So you want to remove the balancers for performance purposes? To get more HP? I would think there are many better, more efficient ways to get HP and TQ. I don't even think the loss of HP from balancers can be felt on the butt dyno. The numbers would be negligible from what I understand and have read. Just doesn't seem like a good idea IMO.
Bike is a 103" now. pushing 110 hp and 115 lbs of tq. I want to achieve 120 square with the build keeping it a 103". So i am looking for every possible option to get me there.
Why don't you post the specs of your build and a dyno sheet? Maybe then we can offer worth while suggestions to help you get there. I would say removing the balancers won't get you there anyway. I can't imagine gaining 10 hp by removing the balancers. Without knowing exactly what you have it's impossible to offer anything except "YOU'LL RATTLE YOUR TEETH OUT!" and "Don't forget to carry some tools to bolt the pieces back on after they fall off" LOL!.
As you can see 120/120 is defintely possible with a 103" that has the goods. That being said, if you're at 110/115 and you reached a square 120/120, probably the only way you would ever know it is with a piece of paper. I don't think you could possibly feel the difference with the but dyno unless you changed the power curve, and I'm not sure you would even feel it then. This is, of course, all speculative without the engine specs and a dyno to see where you power is being made.
Well i knew posting this i would get alot of input and have done some research into this i also apologize about bitching about the negative input also. I am not going to be removing balancers from the engine. After reading this article in hotbike i think i am gonna find somebody that can do that kind of work. http://www.hotbikeweb.com/tech/0807_...ons/index.html Now as far as my combo right now i have Branch pt heads, cp flat top pistons, yeilding 10.4-1 compression ratio, S.E. 260 cam, S.E. Quick install pushrods, stock tappets, stock rocker support plates and rocker arms. S.E. stage one breather with zippers big filter upgrade, exile cycles hi lo drag pipes and for tuning i have the S.E. super tuner. I would like to keep my heads if possible. I also just picked up a S.E. heavy breather. I also plan to pick up a D&D low cat for the build. So what do you guys suggest? I also went through 2 belts last season so i did a chain drive conversion. and added 2 more teeth in the rear sprocket to get some more lower end. (54 tooth to be exact, i cant remember what i got in the front but when i talked to baker they told me that a 52 tooth rear sprocket would be stock gear ratio.) Like i said i want to squeeze all i can out of the bike while still run on 93 octane.
Gid rid of the SE260 cams. Talk to the Branch guys about what cams they would recommend for their heads. Heads and cams are the only two places you can get more TQ/HP. So, you can find cams the will work with the Branch heads or get rid of the Branch heads along with the 260s and come up with another head/cam combination, like TMan, that will deliver the goods.
Might as well have the crank trued, balanced and welded while you have the balancer work done. I think Hoban Brothers also does this work.
If you went through two belts in one season, it wasn't the TQ/HP that caused that. There are plenty of guy running more guts and have no problems with belts. The belts were probably not adjusted properly.
Is it the lighter flywheels that make the twin cam vibrate more than an EVO? My EVO shakes a little in my 99 Softail Custom, but no where near what you guys are talking about. I am plenty comfortable at 70 MPH and above for that matter. Just wondering.
Never ridden an EVO but who says the TC vibrates more? I have one of each, a counter balanced softail and a rubber mounted touring bike. The softail doesn't vibrate at all but will start a buzz at speeds above 75mph. Not noticeable except on 500 mile plus days if you run at high speeds for extended periods of time. I don't really feel the buzz but you know you have been "buzzing" when you get off the bike at the end of the day.
The touring bike shakes at idle but by 1500-1800 rpms that's gone and at highway speeds, very smooth without the softail buzz.
I think you might consider going with a 50 or 54mm throttle body/manifold to increase the air flow ... is your current TB bored out or shaped to improve flow characteristics ...? Could look at swapping out 1.625 stock rocker arms for 1.75:1 ratio rocker arms from Crane ... maybe roller rocker arms ...
If you want to simuate what it will be like to ride without the balancers just remove one of your spark plug wires and ride around like that for a few hours.
I know the balancers weigh about 25lbs and do rob HP....
Did you read that from a reliable source. Never had it in hand but my guess that would be twice the total for the housings, chain, sprockets that it adds to the engine. I doubt the actual counterbalance wheels weigh 3lbs each. I had a thread and of course it was poorly labeled and now I can not find it but there was some good shots of it and from a user that said his motor ran fine without it and all he did was take it out. I just soon have it. My buddy's Dyna shakes the horn cover loose and I have more power than I need. If I personally wanted something faster or ever available HP I would buy a Hayabusa
Last edited by Jackie Paper; Sep 14, 2018 at 10:27 AM.
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