Quote:
Originally Posted by Dragncar
Still, do they make more proven, reliable power than a big aftermarket Chevy, Ford or Hemi ? Is it just another flavor of the same, in the end horsepower ?
Or is there some advantage, cost per HP ?
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Quote:
Originally Posted by adam woodmancy
Those magic 4 letters are all you need to know.
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No disrespect meant at all to Alan Johnson, but they didn't exactly reinvent the wheel with the 481X. It's basically a Billet version of a Big Chief with the cam raised and pushrod moved around to improve valvetrain geometry. It has a standard 4.840" BBC bore spacing, and uses a BBC crank, with optimized bearing sizes, an 8 bolt Hemi flange. The block height is 10.4" and they are a 4.5" bore engine, so they've aren't some huge bore, stretched block monster that many assume them to be. The center 3 mains are crossbolted and the block design honestly looks just like a shiny Big Chief block.
They are great engines no doubt, but they are honestly an improved version of a tried and true design that has been around quite a while.