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Thread: Harmonic balancer size SBC
          
   
   

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  1. 02-18-2010 11:44 AM #1
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    Oldschool66
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    Harmonic balancer size SBC

     



    My question is, can I put a 6" balancer on my 350 cu. in. post 1986 small block engine. Right now the balancer I've got is 8 inches. I've heard about internal balance and external balance crankshafts for the small blocks, but how do you tell the difference between the two. Speedway sells a 6" balancer for internally balanced engines. I would like to get a little more clearance for my tie rod on the 29. Right now I've got 1.75 inches at ride hieght and would like to get about 2.50 to 2.75. I hate to buy dropped steering arms if I don't have to. Your expertise is requested. Thanks.
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  2. 02-18-2010 01:43 PM #2
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    All 350's are internally balanced, and yes, you can run a smaller dampener. I ran a 283 dampener on a 327 many years ago. As long as it does the job, size does not matter (so to speak).


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  3. 02-18-2010 01:50 PM #3
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    Thanks Rumrumm, I learned something today. And I'm going to show my wife your post about " size doesn't matter" so she can learn to. I'll order the speedway balancer.
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  4. 02-18-2010 03:23 PM #4
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    Quote Originally Posted by rumrumm View Post
    All 350's are internally balanced, and yes, you can run a smaller dampener. I ran a 283 dampener on a 327 many years ago. As long as it does the job, size does not matter (so to speak).


    Not true. 1986 and newer are external balance.
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  5. 02-18-2010 04:14 PM #5
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    And your wife is still not going to believe you.

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  6. 02-18-2010 04:19 PM #6
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    Quote Originally Posted by djv8ga View Post
    Not true. 1986 and newer are external balance.
    nope just the fly wheel side is . the front damper is not external
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  7. 02-18-2010 05:10 PM #7
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    Quote Originally Posted by pat mccarthy View Post
    nope just the fly wheel side is . the front damper is not external
    I never said anything about the damper...so yes, it's still external balance regardless.
    Last edited by djv8ga; 02-18-2010 at 05:16 PM.
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  8. 02-18-2010 05:59 PM #8
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    Quote Originally Posted by djv8ga View Post
    I never said anything about the damper...so yes, it's still external balance regardless.
    no just the rear if the front was it would have a weight on it then it would be all external front and back it is not. he was talking about front dampers ? what are you taking about 400s sbc .454 are externals front and back
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  9. 02-19-2010 04:39 AM #9
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    yep i had some of them hub pins were you could add to the weight on the damper were there is a ring of small holes on the stock oem damper .thats i very small amount of weight to tune it in on external and internal engines any thing more you have to add heavy metal to the crank
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