HP estimation, AFR/lambda, carburetor and injector sizing, turbo matching, and boost analysis.
Calculators in this category
HP and Torque Converter — Bidirectional HP/Torque converter. Shows the formula, the 5252 crossover point, and unit conversions.
HP and Torque Estimator — Estimate horsepower and torque for your build. Pick your engine, heads, cam, intake, exhaust, and compression for a data-backed estimate.
AFR / Lambda Converter — Convert between Lambda, actual AFR, and gas-scale wideband AFR for any fuel. Variable E85 ethanol slider.
Carburetor CFM Calculator — Calculate the right carburetor size for your engine. Real carb sizes from Holley and Edelbrock with overcarburetion warnings.
Fuel Injector Sizing Calculator — What size fuel injectors do you need? Duty cycle analysis, fuel pump sizing, and real injector size matching.
Turbo Finder & Sizing Calculator — Find the right turbocharger for your engine. Airflow, boost pressure, compressor sizing, and turbo recommendations by HP goal.
Octane Mix Calculator — Blend two fuels to hit a target octane, or calculate E85/ethanol mix ratios with seasonal correction. Shows stoich AFR and energy content.
Ignition Timing Advance Curve Calculator — Visualize your ignition advance curve. Input initial, mechanical, and vacuum advance to see total timing vs RPM at WOT, part throttle, cruise.
AN Fitting Size Chart — AN / JIC fitting dash sizes with tube OD, JIC 37° flare thread, and ORB thread. For fuel system, oil cooler, and turbo plumbing.