Harmonic Balancers..
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Harmonic Balancers..

  1. #1
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    Default Harmonic Balancers..

    Just wondering if anyone has ran one of these "rattlers" before? I'm building a pretty mild lake cruiser and have an SFI approved cheaper balancer I planned to use but got this rattler in a box of parts I picked up. Heres a link to the summit add. Sounds like a good idea but I'v been lied to before!

    http://www.summitracing.com/parts/TCI-870006/


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    gn7
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    Quote Originally Posted by ColtS View Post
    Just wondering if anyone has ran one of these "rattlers" before? I'm building a pretty mild lake cruiser and have an SFI approved cheaper balancer I planned to use but got this rattler in a box of parts I picked up. Heres a link to the summit add. Sounds like a good idea but I'v been lied to before!

    http://www.summitracing.com/parts/TCI-870006/
    Not sure what you mean by a "cheaper" SFI balancer, but there units out there that have no business being on a cheapo Pep Boys rebuild, let alone an even slightly warm marine engine.
    The Rattler is not my first choice in dampers, but it is miles ahead of the vast majority of stuff out there. Depending in the "cheap" unit, I would go with the Rattler


    ColtS please do not take offese to this statement, but IT IS the truth. Ask any number of members on this forum. In fact a member said as much once before about some of the ProComp stuff.

    It never ceases to amaze me, the number of people that have no concept of what a part does in choosing a cheaper part. The impact a junk damper has on you crank can be HUGE! But if you are not aware of this fact, it natural to go with the cheaper "pulley mount"!
    In the words of the "other" member here. "If it moves, by the best part you can afford and cheapen up on the none moving parts." Seriously, why will some of you buy 200.00 valve covers and a cast pistons. A 500.00 manifold and a cast crank with a 75.00 damper? 700.00 headers and a 150.00 oil pan because you can't SEE IT.

    I don't understand the concept.



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    Last edited by gn7; 03-26-2012 at 11:43 PM.

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    Quote Originally Posted by gn7 View Post
    Not sure what you mean by a "cheaper" SFI balancer, but there units out there that have no business being on a cheapo Pep Boys rebuild, let alone an even slightly warm marine engine.
    The Rattler is not my first choice in dampers, but it is miles ahead of the vast majority of stuff out there. Depending in the "cheap" unit, I would go with the Rattler


    ColtS please do not take offese to this statement, but IT IS the truth. Ask any number of members on this forum. In fact a member said as much once before about some of the ProComp stuff.

    It never ceases to amaze me, the number of people that have no concept of what a part does in choosing a cheaper part. The impact a junk damper has on you crank can be HUGE! But if you are not aware of this fact, it natural to go with the cheaper "pulley mount"!
    In the words of the "other" member here. "If it moves, by the best part you can afford and cheapen up on the none moving parts." Seriously, why will some of you buy 200.00 valve covers and a cast pistons. A 500.00 manifold and a cast crank with a 75.00 damper? 700.00 headers and a 150.00 oil pan because you can't SEE IT.

    I don't understand the concept.
    Colt, As Bob said.... you asked the question and Bob is offering you a good answer. I can't add anything to what Bob has not said other than agreeing with him fully and reinforcing the need for a good product. Some of the dampners that were good over the years were the Fisher and Fluiddampner, etc. My choice in our engines is the ATI. As Bob says, the "Rattler" is not my first choice, but is way ahead of a lot of the "imported" dampners.

    Gear

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    Ati

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    No offense taken at all! Thats why I ask here on the forum before I do something that may cost me in the long run. The cheaper balancer I was refering to was from a stock 454 build I did awhile ago and never planned to spin any real RPMs. I can see spending some real money on a balancer since it is bolted to the crank and Im ok with not going cheap here. Just wanted some opinions on the rattler. Never know when Ill actually score on a box find and from reading the summit description it sounded like a decent balancer. Theres also a reason Iv never seen one on a boat before or even heard of one! Thanks guys!

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    Senior Member rpm0414's Avatar
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    Had a rattler once. Once!. Was crap. Let's just say after that lesson in bearing wear the ATI went back on.

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    Whats the over/under on Fluidamper, it came with the boat.
    thanks

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    ptc
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    So in using an ATI brand for an internally balanced motor. Does the whole rotating assembly have to be rebalanced using the new balancer or how does that work? Also what determines which diameter to use between the 7", 7.5" and 8"?
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    Internally balance would need a neutral balanced dampner. Any neutral balance dampner would be interchangeable on an internal balanced motor with no additional balancing. Might be a good idea to have it checked to assure it has a zero or neutral balance. As far as the diameter, I've read stories about guys making more hp with the larger diameter, but I am no expert on that. I run a romac with no complaints on my Sbc spinning 5500+.

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    Okay now I am curious as what the guru's here recommend? Please indulge me on an external or internal choice would be. I am serious here and would appreciate GN-7' s response. Mark

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    No expert but, imho, internal balance is easier on parts. Externally, your hanging weights on the ends of the crank vs where it needs to be to correct the imbalance.

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    Quote Originally Posted by 67weiman View Post
    No expert but, imho, internal balance is easier on parts. Externally, your hanging weights on the ends of the crank vs where it needs to be to correct the imbalance.
    I completely agree! Thank you but engines have been built for many years and the technology has changed so much that I want ALOT of opinions here and their are alot in this forum that I want opinions from. Internal harmonics can kill an engine in a heart beat and have known this fact for years. I am in the progress of a test on an engine as we speak just to prove a point to myself. If I come up wrong it will be an expensive lesson to be learned and will pay the price myself to check it out! M

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    Quote Originally Posted by ol guy View Post
    I completely agree! Thank you but engines have been built for many years and the technology has changed so much that I want ALOT of opinions here and their are alot in this forum that I want opinions from. Internal harmonics can kill an engine in a heart beat and have known this fact for years. I am in the progress of a test on an engine as we speak just to prove a point to myself. If I come up wrong it will be an expensive lesson to be learned and will pay the price myself to check it out! M
    I hope it is on a dyno..Internal balance is the only way to go.
    Last edited by jimclauss; 03-28-2012 at 05:43 PM.

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    I totally respect that. I'll be watching this thread to see where this goes. I'm sure there will be a lot of useful info and a spattering of bs to follow. Lol.

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