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440 crank in a 400 block balancing questions?
I have a pretty much gone 440 crank (steel) that has been turned and has had bearings spun. Its pretty much junk, but I aslo have a late 70's 400 block laying around too. Just wondering about the balancing on these combo's using the off the self KB pistons available. And did they need mallory added to it when balanced? Im not sure of what rods I will be using probably production 400 rods, for less weight, compared to the much longer rod of the 440.
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68 Coronet 69 Super Bee......new 500 cid comin soon! 73 Duster witha missing 440/727 |
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440 crank
you can't have the steel crank built back up and re-ground?
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I did that exact combo. No mallory was needed. Just cut the mains to suit the 400 block.
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You cut the mains to 400/383 specs, and cut the counterweight diameter down to I believe 7.25", and using either a 440 or 400/303 length rod (depending on what compression heigth you want) that it balances out quite nicely. Another thing you could do is turn the rod bearings down to Big block Chevy size 2.2" and us an off the shelf 6.535" rod.
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Re: 440 crank
Quote:
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68 Coronet 69 Super Bee......new 500 cid comin soon! 73 Duster witha missing 440/727 |
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The KB's are a bunch lighter than the stockers and the counterweights are heavier than those on a cast crank so balancing is not a problem with either rods.
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