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I have a 408 bbc with stock 3/8" rods and ARP bolts.

I plan to only spray up to 150, maybe 200hp and shifting at 6800-7000 rpm.

Will that amount be ok for those rods?

A comment was made to me once, that I shouldn't be afraid to spray my motor with a 300 shot, but I'm not sure to about that comment???
 

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I think you should be ok . I've sprayed 250 on a stock bottom end 454 for 2 years and about 200 passes and never hurt it. There is never any guarantee ,but I had alot of stock rod and bolt small blocks with alot more than you want to use and never broke a rod, burnt a few pistons but no rod or bolt failure. .
 

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The only thing that rod bolts see is the reciprocating mass trying to change direction at "x" fps piston speed during valve overlap (no cushion) . If you're finish line rpm's increase on nitrous then so will piston speed.
You could be living on borrowed time now, or that stuff might live forever who knows?
 

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Sprayed 250 for years on nice shotpeened, resized stock rods with 3/8 ARP rod bolts. In 3 totally different applications. Never had a single problem. Two of those even had stock cast crankshafts in them.
 
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