Free tuning calculators
Quick, accurate math for your build — no signup. Then let the Copilot apply it to your actual tables.
MAF / VE auto-correction ⭐
Paste a datalog and get the exact % correction per RPM×MAP cell from your fuel trims — the e-tune loop, automated.
Open →AFR ↔ Lambda converter
Convert air-fuel ratio to lambda (and equivalence ratio) on gas, E85, E30 or methanol.
Open →Injector size calculator
Size injectors for a power goal, or find the max HP a set of injectors supports.
Open →Effective compression calculator
Get effective compression ratio and pressure ratio from static CR + boost.
Open →Want it applied to your real tune?
The Copilot reads your VCM Editor tables and gives the exact changes.
Open the Copilot