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  #41  
Old 01-20-2017, 04:51 PM
Curious George's Avatar
Curious George Curious George is offline
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I run a Romac 0223 (all steel) on both my motors. Did have to trim the oil pan back a bit though, cleared timing cover and uses 4 bolt pulleys.

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Whitmore 462, 670 heads 10.55@125
Same with 310 E D-ports 10.12@131
498 w/single 88 8.53@158
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  #42  
Old 01-20-2017, 10:24 PM
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Aaron Quinton Aaron Quinton is offline
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The modulus of elasticity of the materials and the pin/main overlap will be the main drivers in torsional stiffness changes.

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Originally Posted by BruceWilkie View Post
Its logical cast forged or billet will have differing critical frequencies.

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