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Toolbox / Tools for your build

Measure. Calculate.
Build.

Working out engine dimensions, injector size or gearing? Find a calculator, check the numbers and get back to your build.

20calculators, converters and tools
from planning to the workbench

Engine building

Dimensions, timing and engine assembly.

Ch Calculator

Calculate deck clearance and engine displacement from bore, stroke, connecting rod length and piston compression height.

Compression Calculator

Calculate compression ratio, combustion chamber volume and displacement, including piston dome and dish corrections.

Bob Weight Match

Calculate the bob weight required for crankshaft balancing from rotating and reciprocating masses.

Mitoituskaavake – PDF

Record dimensions, clearances, settings and notes in a fillable V8 engine build sheet.

Air and fuel

Fuel systems, airflow requirements and conditions.

CFM Calculator

Calculate engine airflow requirements in CFM from displacement and RPM.

Humidity calculator

Calculate air humidity values for engine tuning and performance estimates.

Drivetrain and wheels

Gear ratios, RPM, wheel and tire dimensions.

Gearing Analyzer

Calculate final drive ratio, road speed, RPM and quick-change gear combinations.

Driveshaft-calculator

Calculate driveshaft rotational speed and critical RPM for drivetrain sizing.

Tire-size

Compare wheel and tire sizes, offset, backspacing, clearance, diameter and ride height changes.

Unit converters

Temperature, pressure and other units.

Converter 5000

Convert common automotive and motorsport measurement units.

Water and track

Propeller calculations and reaction practice.

Prop-calc

Calculate theoretical boat speed, propeller slip and related values.

Draggy

Practice and measure reaction time with a motorsport reaction trainer.

Select a tool to open it.Calculators and tools open on their own pages.