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Technical Calculators
Navigation
Use these links to navigate the calculators.
1. Power from Trap Speed Estimator
2. 1/8 AND 1/4 mile ET and Trap Speed from Power Estimator
3. Compressor Map Tool / Horsepower Potential Estimator
4. Intake Temperature Calculator
5. Airflow Converter (lb/min to CFM)
6. Airflow Converter (CFM to lb/min)
7. Injector Size Calculator
8. Engine Displacement Calculator
9. Engine Displacement Converter (cc to ci)
10. Engine Displacement Converter (ci to cc)
11. Tire Diameter Calculator
12. Rotational Mass Equivalency Calculator
Estimate Power from 1/4 mile Trap Speed
This calculator uses a modified version of Force=Mass*Acceleration to calculate how much power it would take to make your car go a certain speed by the end of a quarter mile.
Variable
Input
Vehicle Weight (Including driver)
1/4 mile MPH
@ Flywheel
@ Wheels
Back to Navigation
Estimate ET and Trap Speed from Horsepower
This calculator uses a modified version of Force=Mass*Acceleration to calculate how fast a car with the given power and weight would take for 1/8 and 1/4 mile
Variable
Input
Vehicle Weight (Including driver)
Wheel Horsepower
1/4
@
1/8
@
Back to Navigation
Turbo Power Estimator and Compressor Map Tool+
This calculator uses the amount of air and fuel flowed and calculates the amount of horsepower created by burning that air/fuel mixture.
Variable
Input
Engine Displacement (cubic inches)
Desired Boost (psi)
Desired Engine RPM (redline or shift point)
Intake Temperature (Post Intercooler if applicable; °F)
Intercooler Pressure Drop (psi)
Air Fuel Ratio
:1
Volumetric Efficiency (est. 90% for DOHC 4 valves per cylinder)
%
Brake Specific Fuel Consumption (BSFC)
Using the following two numbers given from the calculator above, you should be able to use a compressor map to select the turbo that best fits your desired power goals.
Variables for Compressor Maps:
CMf:
Pr:
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Intake Temperature Calculator
This calculator will calculate the intake temperature based on the compressor and intercooler.
Variable
Input
Turbo Inlet Temperature (Consider inlet pipe and filter location)
Turbo Inlet Pressure (psi: filtered:~13.95; open:~14.7; -0.5psi/1000ft elev.)
Boost (psi)
Compressor Efficiency (Map Pr and CMf on compressor map)
Intercooler Efficiency (%)
Intercooler Pressure Drop (psi)
Ambient Temperature (outside the engine bay °F)
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Intercooler Inlet Temperature
Intercooler Outlet/Intake Temperature
Back to Navigation
Airflow Convertor (lb/min to CFM)
This calculator will convert airflow rates from pounds per min to cubic feet per minute.
Variable
Input
Airflow (lb/min)
Back to Navigation
Airflow Convertor (CFM to lb/min)
This calculator will convert airflow rates from cubic feet per minute to pounds per minute.
Variable
Input
Airflow (lb/min)
Back to Navigation
Injector Size Calculator
This calculator will allow you to calculate the needed injector size for you to support a specified horsepower at the injector duty cycle.
Variable
Input
Engine Horsepower
Number of Injectors
4
6
8
10
12
BSFC
Injector Duty Cycle
Lb/Hr
cc/min
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Engine Displacement Calculator
This calculator will determine the displacement in CI of an engine based on the bore, stroke, and number of cylinders.
Variable
Input
Bore (in)
Stroke (in)
Number of Cylinders
4
6
8
10
12
Back to Navigation
Engine Displacement Converter (cc to ci)
This calculator will convert cubic centimeters to cubic inches.
Variable
Input
Displacement (cc)
Back to Navigation
Engine Displacement Converter (ci to cc)
This calculator will convert cubic inches to cubic centimeters.
Variable
Input
Displacement (ci)
Back to Navigation
Tire Diameter Calculator
A tire with a larger diameter will make your speedometer read slower than you are going and a tire with a smaller diameter will make your speedometer read faster than you are going. In addition, a tire with a larger diameter will take more power to rotate.
Variable
Input
Tire size example: 215/55/17
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Equivalent Mass of a Rotating Object Calculator
This calculator will calculate the affect of taking weight off the engines rotating assembly as multiplied through the gears. This includes flywheels, pulleys, etc. prior to the transmission.
Variable
Input
Change in rotating mass
Diameter of rotating object
Weight equivalency in first:
First Gear
:1
Weight equivalency in second:
Second Gear
:1
Weight equivalency in third:
Third Gear
:1
Weight equivalency in fourth:
Fourth Gear
:1
Weight equivalency in fifth:
Fifth Gear
:1
Final Drive ratio
Final Drive
:1
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Tire Diameter (Use calculator if needed)
inches
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Back to Navigation
