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Old 09-28-2010, 01:01 PM
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400 sb

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Which one is stronger the 4 bolt or 2 bolt main ?

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Old 09-28-2010, 02:20 PM
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Quote:
Originally Posted by thatman66
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Which one is stronger the 4 bolt or 2 bolt main ?
Word on the street is that there is more material in the main saddle webbing (crankcase) in the 2-bolt block, making it more desireable for hot rodding. My feeling is that either one would be ok up to 500 hp if rpm's are kept at a reasonable limit. In my opinion, it's high engine speeds that will push the rotating assembly out of the webbing and cause you to run over the crank.
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Old 09-28-2010, 04:53 PM
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If i have to here about this topic once more im going to freak out!
theres miles of posts about this and he just hit it on the head,
I personally build a 1970 4 bolt with ARP studs and had it internally balanced great machine work is the key to making this engines live.
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