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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",{"$nulls":4},"EVO = Exhaust Valve Closing"]
[null,"HPD(Header Pipe Diameter inches) = ((SCID * 16.38)/((HPL +3)*24)))*2.1",{"$nulls":5},"SCID = Cubic Inch displacement of a single cylinder"]
[]
["RPM","EVO (BBDC)","HPL Inches","HPD Dia Inches","SCID cubic inches"]
[7000,73,31.85,1.579248206599713,40]
[6500,73,34.53076923076923,1.4664447632711621,40]
[6000,73,37.65833333333333,1.3536413199426112,40]
[]
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