HEMI ENGINE - GREAT
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Uploaded by rcdv91 on Oct 10, 2006
HEMI engine (digital)
Top Comments
All Comments (101)
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@EngineeringExplained Then again, you're talking two different eras. The 426 hemi was, in my opinion, the best use of cubic inches out of all the American v8's until the 2011 5.0 came around lol
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@DeAdiSSu3 Perhaps, but 4 valves per cylinder more than makes up for the loss, much better airflow, especially at high rpms, in comparison with a HEMI.
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@EngineeringExplained If you look at the rim of the intake/exhaust holes (not the ports - the holes where the valves sit when they aren't open) on the 426 hemi, you'll see it's a better angle for flow as opposed to a wedge-shaped combustion chamber's valve position.
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@1066gonzo What do you mean by "straighter?" I'm assuming vertical with the cylinder heads? HEMI's are actually quite difficult to orient valves compared to a flatter pentroof design, which also allows for 4 valves, meaning greater airflow.
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The straighter the flow of the intake and exhaust gasses the more flow through the head. The HEMI head excells in the efficency of flow. The angle of the valves is EVERYTHING to all engines This is the reason that all of the top pro classes in dragracing use a HEMI or variation of the hemi engine for the most power possible.
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@Daschickenify The combustion chamber is hemisphereical in shape....thats where the name come from,not the top of the pistons
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fucking music .... put here engine sound!
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Chrysler calls these new engines "Hemi" but they aren't really Hemi by design, it's just another selling pitch.
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What hemi? A hemi means that the top of the pistons are hemispherical, hence the name hemi.
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@fordboy111591 The 426 Hemi debuted Daytona 500 1964...(took 1st,2nd and 3rd too)....they had to make thicker walled castings because the first blocks they cast kept cracking under race profile testing....It was based on the 426 wedge engine
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do you mean the 426 ?
prima5driver 2 years ago 8
it has a much larger quench area, more power, cam higher in block, higher rpm, no intake valve guide in the intake port, more flow=more power, so whats so bad about it?
mopar43v3r 3 years ago 6