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["Header Formulas from book “ Performance Tuning in Theory and Practice” by Graham Bell"]
[]
[]
[null,"HPL(Header Pipe length inches) = ((850*(360 -EVO))/RPM) – 3",{"$nulls":5},"EVO = Exhaust Valve Opening"]
[null,"HPD(Header Pipe Diameter inches) = ((SCID * 16.38)/((HPL +3)*25)))*2.1",{"$nulls":5},"SCID = Cubic Inch displacement of a single cylinder"]
[]
["RPM","EVO (BBDC)","HPL Inches","HPD Dia Inches","SCID cubic inches",null,"Area","Volume in^3"]
[7000,73,31.85,{"v":1.579248206599713,"d":"1.5792"},40,null,1.9588025743947297,62.387861994472146]
[6500,73,34.53076923076923,{"v":1.4664447632711621,"d":"1.4664"},40,null,1.6889675258811698,58.321347874465935]
[7900,73,27.879746835443036,{"v":1.7822944045911047,"d":"1.7823"},40,null,2.4948748707750013,69.5564797833157]
[null,null,"  "]
[null," ","HPL using","HPD   inches",{"$nulls":3}," "," "]
[null," ",27.575999999999997,{"v":1.8,"d":"1.8000"},null,null,2.5446900494077327,70.17237280246763]
[null,null,34.531914893617014,{"v":1.4664000000000001,"d":"1.4664"},null,null,1.6888644158843453,58.31972227617642]
[null,null,37.6595744680851,{"v":1.3536000000000001,"d":"1.3536"},null,null,1.4390324017002707,54.19334789381869]

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