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.
Lambda to AFR Converter — Both Directions — Convert lambda to AFR or AFR to lambda for pump gas, E85, E98, methanol, propane and CNG. Instant result on both the gas scale and true AFR.
Exhaust Header Tube Length Calculator — Header primary tube length and diameter from displacement and target RPM, with collector sizing and the tube sizes Hooker, Kooks and ARH actually ship.
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 matching to real injector sizes, for pump gas, E85 and methanol.
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 110 with 93 — Blend two fuels to hit a target octane — race gas with pump, or any E85 ratio. Shows mix percentage, resulting stoich AFR, BTU content and MPG impact.
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.
Pressure Converter — PSI, Bar, kPa, atm — Convert between PSI, bar, kPa, atm, and inHg — for boost gauges, oil pressure, fuel rail, and vacuum measurements.
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.