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Old 02-05-2009, 12:02 AM
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bbc 454 to 496

rod length differences and pros and cons. im not going to use the stock length rod. what are the differences and pros and cons to using 6.385, vs. 6.535 rods?

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Old 02-05-2009, 09:34 AM
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It's about the same argument that's well documented everywhere, for small blocks running 5.7 vs. 6.0 rods, basically very little difference in a street driven engine.
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Old 02-05-2009, 09:55 AM
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Quote:
Originally Posted by dman16
rod length differences and pros and cons. im not going to use the stock length rod. what are the differences and pros and cons to using 6.385, vs. 6.535 rods?
Possible con would be (if) the longer rod causes the piston pin to be moved up into the oil ring land area with different piston compression heights requiring ring spacers. I'm not up on BBC specs, so it may not happen.
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Old 02-05-2009, 10:24 PM
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which rod would be easier to make clearance for in the block?
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Old 02-06-2009, 12:04 AM
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Depends on the style....H-Beam or forged stock style, or Aluminum. They all create different issues that need to be addressed.
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Old 02-06-2009, 12:17 AM
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im thinking of going with eagle h beams
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Old 02-06-2009, 12:28 AM
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Well its not rocket science, you just need to dummy up the crank in the block, and slip a wrist pin thru to hold on the piston, put a set of rod brgs. in the rod and cap and snug it up, and begin rotating it to see where it hits. The oil pan rail side of the block and the opposite side of the lower part of the cylinder close to the cam is where most of your grinding will be concentrated. Just go slow, and dont grind away any more material than is necessary. Its best to do it before you finish hone the block, in case the burr or cartridge roll gets away from you....Also, make sure you dont have any counterweight to piston interference either as your rotating, or counterweight to block contact.
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Old 02-06-2009, 06:07 PM
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what tools would be best to use for grinding the block to make the rods not make contacts with it?
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Old 02-06-2009, 09:05 PM
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You will need either an electric or air operated die grinder, and an assortment of carbide burrs, and then some round sanding cartridge rolls for finishing and smoothing.
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