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satterley_sr
Samba Member
Joined: March 31, 2005
Posts: 652
Location: Belleville,MI
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 Posted: Tue Jul 01, 2025 2:33 pm Post subject: .030 and .040 Under Crankshafts |
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Is there any downside to using rod journal cranks reground to third or fourth cut in high performance applications (6000 rpm plus]?
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DDC racing |
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Brian_e 
Samba Member
Joined: July 28, 2009
Posts: 3956
Location: Rapid City, South Dakota
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| Posted: Tue Jul 01, 2025 2:43 pm Post subject: Re: .030 and .040 Under Crankshafts |
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Smaller diameter means less surface speed at the bearing. A good thing for higher RPM.
Thicker bearing shells aren't terrible.
Downside would be loosing surface heat treat depth. Just like a case that has been line bored 3-4 times, it might have other hidden issues from a previous hard life.
Brian
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www.type-emotorsports.com
Type E Engine Parts and Supplies
https://type-emotorsports.com/collections/engine-parts |
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