4 calculators in this category
- Volumetric Efficiency CalculatorIdeal-gas volumetric efficiency (Heywood)Volumetric efficiency tells you how completely each cylinder fills compared with its own swept volume. Enter your displacement…
- Camshaft Duration, LSA & Overlap CalculatorCam-card valve event convention (0.050 in tappet lift)A cam card gives you three numbers — intake duration, exhaust duration and lobe separation angle — plus however…
- Rocker Arm Ratio & Valve Lift CalculatorRocker lever ratio and net-lift conventionRocker arms are levers, so the lift at the valve is the lift at the cam lobe multiplied by the rocker ratio. Change the ratio…
- Cylinder Head Airflow Horsepower Potential CalculatorOrifice flow scaling (√Δp) with the 0.257 hp/CFM correlationA flow bench gives you cubic feet per minute at one test depression. Two numbers you actually want are not on the sheet: what…
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- Volumetric Efficiency Calculator
- Calculate engine volumetric efficiency from measured airflow, MAP and intake air temperature. Get theoretical CFM, actual CFM, mass flow and VE percent.
- Camshaft Duration, LSA & Overlap Calculator
- Turn cam card duration, lobe separation angle and installed advance into overlap and full valve timing: IVO, IVC, EVO and EVC, with centerlines.
- Rocker Arm Ratio & Valve Lift Calculator
- Find lobe lift, gross and net valve lift and the lift you gain by stepping up rocker arm ratio, with the retainer-to-guide clearance the change needs.
- Cylinder Head Airflow Horsepower Potential Calculator
- Convert flow bench CFM between test depressions and estimate the peak horsepower a cylinder head can support, plus the flow a target power level needs.