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400 small block chevy engines were never designed for building horsepower. 400 small block chevy engines were designed and built specifically for torque and consider what type and what weight vehicles they came in and you will see where I am coming from. Most were larger, heavier cars and trucks that needed extra low end grunt. In my opinion the 400 chevy engines never came with a cylinder head or camshaft that was ideal for moderate to higher rpm horsepower.
My 406 is a 6 inch rod engine and sees 8,000 rpm regularly and it is super smooth (internally balanced doesn't hurt either).
Hey tj this is Steve your talking about my engine build. I am going to send you the Hot Rod article today my brother inlaw says he will scan it for you and I can email it to you .STEVE
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by hooblyboobly
Correct me if I'm wrong, but GM never intended the 400s to be revved high.
Certainly, it was strictly a torque engine made for heavier vehicles. But although the block is slightly weaker than the 4" bore SBC, this can be dealt with and it's been a great platform for building big inch small blocks at a reasonable cost. (That means w/o having to purchase an aftermarket block) To my way of thinking, unless you're building a 502 or larger engine, it makes the big block just so much extra dead weight for most applications.
I see we have a general consensus forming here on the issue of rod length, just as we've formerly achieved on header primary tube size, TB size, etc., etc. ad nauseum... Hey, if we all did it the same way, it'd be boring around here now wouldn't it?
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
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