Methanol

Mercedes AMG Methanol Injection Upgrades

Methanol injection is a proven way to cool the intake charge, suppress knock, and support higher boost levels in turbocharged and supercharged AMG platforms.
In advanced setups, it can also supplement fueling for aggressive ethanol or big turbo builds.

Why Methanol Injection?

  • Charge Cooling: Lowers intake air temps for more consistent power under boost.
  • Knock Suppression: Reduces detonation risk when running higher spark advance or lower-octane fuel.
  • Fueling Support: In extreme builds, allows partial replacement of commanded fueling to run closer to lambda 1 at high load.
  • Octane Effect: Effectively raises the knock resistance of the fuel blend for more aggressive tuning.

What’s in This Category

  • Methanol Injection Kits: Complete systems with pumps, lines, controller, and nozzles.
  • Nozzles & Hardware: Components for dialing in flow rates and spray patterns.
  • Reservoirs / Tanks: Add-on tanks for extended capacity and stealth installs.
  • Failsafes & Controllers: Monitor flow, pressure, and failsafe logic to keep the engine protected.

Important Notes

  • Tuning Required: Any meth setup must be tuned for — especially if used as supplemental fueling.
  • Failsafes Recommended: Always run flow monitoring or pressure-based failsafes to cut boost or add fuel if meth flow drops.
  • Maintenance: Inspect nozzles and lines regularly; methanol is corrosive if not stored or filtered correctly.
  • Fuel Mix: Most setups run 50/50 water-meth for best balance of cooling and knock suppression.

History

Methanol was pioneered by the Nazi-era Germany to increase power in boosted internal combustion engines.  This enables less fuel trim, more advanceded timing, and higher compression without detonation.  These can also “clean” the engine.  They pose a slight risk of hydrolock with a stuck injector.

Most people will gain power without a specific tune, but with a specific tune and a tuner willing to push it is possible to unlock massive gains like the German’s did often exceeding 35%.

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