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The hemi valve angles are what makes them so great NA

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I respectfully disagree........Hemis ran great back in the day because of what the ports flowed......I've got money that says if you allow a '69 427 Super Stock Camaro to run two carbs, it'll spank the Hemi.......

If valve angles aren't a problem, why doesn't Chevrolet have a Hemi for their rat motors???

Valve angles ARE important......They help determine how much exhaust runs back up the intake tract and they help determine how much clean air runs out the exhuast port........

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So what's it's advantage with forced induction? Do all of the advantages seriously outweigh the disadvantages when boost is added?............

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In a blown application, they're great because you can run a flat top piston, which weighs less......you can put huge valves in the chambers.........and you don't have to worry about reversion because you have boost........