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Could someone please explain what valve overlap is & what the pros & cons
would be for A high proformance street car. Thanks

Keith
 

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from what i understand, valve overlap is the brief period of time when both the intake and exaust valves are open to induce scavaging i think. i read it in "how to build horsepower" by david vizard, id recomend that book if u got more questions about this kinda stuff.
 
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