how do I balance the bottom of this BBC - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-06-2006, 07:38 PM
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how do I balance the bottom of this BBC

today I was just about to order my crank kit when I noticed in the description that it has an externally balanced crank... well, one of the options I checked off was to have the whole kit balanced. wouldn't they need the damper and flywheel to do this? I've been reading old posts and articles on balancing and now I only feel more confused than ever. if I have a 454 should I be looking for an internally or externally balanced crank and why? and what damper and flywheel do I use? I have a flywheel off a sbc 350 and I just assumed it would work on my BBC, but a friend told me recently that my thinking was just insane... I'm starting to think maybe I should go back to my 427 crank; things seemed like they made more sense. I know this is alot of questions, but the bottom of this engine has me so confused. am I making this harder than it is?

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Old 03-06-2006, 08:04 PM
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Buy a damper and flywheel from the same folks and have them balance it as a complete assembly before it's shipped.


Larry
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Old 03-06-2006, 08:23 PM
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Why not just opt for an internal balanced 454 crank...?
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Old 03-06-2006, 09:05 PM
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Quote:
Originally Posted by Bumpstick
Why not just opt for an internal balanced 454 crank...?
well, I don't know why not, I was hoping someone would tell me.
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Old 03-06-2006, 10:27 PM
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Order your kit without balancing and have it balanced locally with your damper and flywheel. I get them done for $150
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Old 03-07-2006, 10:55 AM
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If it is a flexplate (automatic) then they should be interchangeable from SBC to BBC as long as they are both internally balanced.
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Old 03-07-2006, 04:08 PM
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If you have the option of getting an internally balanced 454 assebmbly, get it. An internally balanced assembly is preferable to an externally balanced assembly because it imparts less stresses on the crank and is easier on main bearings. Plus, you will be able to use your 350 flywheel, as well as an internally (neutral) balanced harmonic balancer (like the 427).

tom
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