Builder tools
Accurate shop calculators for street, drag, dirt, sprint, and 4x4 builds. Use Save related fields / Pull related only so numbers move between tools that actually share them (e.g. compression → dynamic CR & cam — not into gearing).
Example flow: Displacement → Compression → Cam events → Dynamic CR · or Tire/gear for MPH · Suspension stays on its own.
Engine
Displacement (CID)Cubic inches / liters from bore, stroke, and cylinders.Static compressionStatic CR from bore, stroke, chamber, dome/dish, gasket, deck.Dynamic compressionDCR from static CR, rod, stroke, and intake closing (pull from cam).Rod ratioRod length ÷ stroke — side load and dwell context.Piston speedMean and peak piston speed from stroke and RPM.