Performance Trends, Inc.
Producing Quality Computer Tools for Racers and Engine Builders since 1986
Calculators
We have developed some simple calculators that you might have been looking for.
Features of most all these calculators include:
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Lets you mix and match English and Metric units. |
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Allows for professional printouts. |
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Allows for professional looking emails to friends, customers, and/or yourself. |
Drag Race Dyno ~ This calculator will allow you to figure out your horsepower based on your ET times in either the 1/4 mile or 1/8 mile. It's based on the Track Length, Finish Speed and Vehicle Weight.
Port Flow Efficiency Calculator ~ The Port Flow Effciency calculator will allow you to figure out the efficiency of your ports based on Test Pressure, Number of Valves, Valve Diameter, Valve Lift and Flow.
Bore Calculator ~ This calculator finds the Bore to produce a particular engine size based on stroke and number of cylinders. Once you have choosen the units you want (either Cubic Inches or Cubic Centimeters) it will tell you what the bore of the engine should be.
Stroke Calculator ~ This calculator finds the Stroke to produce a particular engine size based on bore and number of cylinders. Once you have choosen the units you want (either Cubic Inches or Cubic Centimeters) it will tell you what the stroke of the engine should be.
Supercharger Boost Calculator ~ Input the Blower Belt Ratio, Engine Volumetric Efficiency Percentage, the Blower Volumetric Efficiency Percentage, the Engine Displacement, Blower Displacement and the Barometric Pressure and the Supercharger Boost Calculator will give you the Blower Boost. And don't forget you can choose between English and Metric units.
Engine Displacement Calculator ~ If you need to know what the displacement for a given bore and stroke this calculator can help you out. Choose your units of measurement, add your bore, stroke and number of cylinders and the calculator will give you an accurate displacement.
Engine Inertia Dyno Sizer ~ If you want to size a flywheel for your Engine Only (not chassis dyno) Inertia Dyno, use this calculator. Choose your engine's HP and some flywheel specs and the calculator estimates the acceleration time. You typically want to see from 5 to 10 seconds for good accuracy.
Chassis Inertia Dyno Sizer ~ If you want to size a roller for your Chassis Inertia Dyno, use this calculator. Choose your engine's HP and some roller and flywheel specs and the calculator estimates the acceleration time. You typically want to see from 5 to 10 seconds for good accuracy.