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Crank Journal

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Old 09-20-2003, 12:49 AM
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Default Crank Journal

What is a crank journal, and what does it do, and how would a larger one help when running lots of boost or got lots of hp.
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Old 09-20-2003, 12:53 AM
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Default Re:Crank Journal

A Crank journal is is a hole in which the journal of the crank sits in, there are also Main/Rod Bearings in this location. These holes keep the crankshaft aligned with the block.

Enlarging them will not give you any type of performance gain, I think you maybe getting confused by Bore Size, which is the size of the actual pistons. Larger bore size increases engine displacment (i.e 1.8l bored over to 84mm to a 2.0l) thus putting out more torque, and in some cases more hp.

Thats a simple explanation,
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Old 09-20-2003, 06:30 PM
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Default Re:Crank Journal

nicely put Jeff !
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Old 09-22-2003, 12:31 AM
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Default Re:Crank Journal

Thanks for the info, now i guess my question is what is the Journal of the crank?
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Old 09-22-2003, 11:21 AM
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Default Re:Crank Journal

crank journal = smooth silver shiney area where crank is bolted into the block. rod journal is where the piston rods are bolted to the crank. ??
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