The 6.635" BB Chevy rod journal has a 2.200 journal diameter.
I have used that rod journal on several of my special Kellogg/Moldex forgings
with a 3.5" stroke. Joe at Moldex NITRIDES the journals after he makes the rod
journal modifications.
Marty Palbykin did a 473 cid engine built with a 2.100" Chevy SB rod journal to get
the stroke he needed for his 740 HP naturally aspirated engine before he went boosted.
If the crank work is proper people have run less than 2.00" rod journals in engines making over 1400 HP boosted. No worries except finding correct bearings for the Pontiac rod journal modifications.
Tom V.
ps and when the engine failed, the rods did not fail, or the bearings, or the pistons.
THE 455 BLOCK 4 BOLT STRAIGHT BOLT MAIN CAPS FAILED ON THE #2, #3, & #4 MAINS.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
Last edited by Tom Vaught; 07-23-2021 at 08:37 PM.
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