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Fuel Injectors

The injector hardware: flow rate, count, dead time, and maximum duty cycle. Size them to power without wrecking idle resolution.

What it is

This is where you choose the injector hardware for the build (the Fuel page injectors topic covers how the ECU uses them). The properties that matter in Engone:

  • Flow rate (cc/min) — peak fuel capacity per injector, setting the power ceiling.
  • Number of injectors.
  • Dead time (minimum pulse width) — the shortest pulse that delivers fuel, which the ECU compensates for.
  • Maximum duty cycle — typically 0.85.

The shipped injectors are the STANDARD set at 240 / 285 / 370 cc (port), 420 cc on the V8, and 340 cc on the V12.

Why it matters

Injector sizing is the same trade described in Injectors, made concrete at build time:

  • Too small → demand reaches the injectors' capacity before peak power, leaning the engine into a soft rev limit.
  • Too big → idle pulses shrink toward the dead time, where metering is imprecise and idle mixture gets jumpy.

How to tune it

Size for your power target with headroom — leave 10–15 % headroom at peak power — but no larger than necessary so idle resolution stays good. The fuel pressure system comes with the engine base.

Rule of thumb

Match injector flow to power, not ego. Oversized injectors make a rough, hard-to-tune idle for no top-end benefit if you weren't maxing the smaller ones.

In the game

Injectors are the FUEL INJECTOR dropdown on the SETUP page. The game doesn't show injector duty cycle; watch the FUEL cell in the throttle box and λ ACTUAL instead (see Injectors).