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Discussion Starter #1 (Edited)
Hello everyone,
I was wondering how many RPM's I can safely take my motor too? I do not have a main girdle but my engine is rebuilt (306) and has crowler rods and trw forged pistons. Other items are in sig under my 91lx. Thanks for any help. -Jeff
 

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Heavy assed pistons, stock crank, and thinwall 2 bolt block, reliable RPM 6500 to 6800 should be tolerable.

Too many weak components to really push it. External balance adds to the vibrations that will beat the main webbing apart.
 
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