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Weistec Water|Methanol Injection System Mercedes-Benz AMG GT | GT C | GT R | GT S 15-20



Model #01-178-01734-2

Shopper Award
Water/Methanol injection has been in use for several decades in multiple applications. Originally, it was used to reduce knock while increasing power and performance in aircraft engines. Eventually it came to be used in the motorsports industry where it was found to have substantial benefits on turbocharged engines. The Weistec Water-Methanol Injection System provides substantial cooling and knock prevention benefits to the M178 BiTurbo 4.0L engine helping improve consistency and performance. The system features a Water/Methanol Controller with built in MAP sensor. This controller is a progressive controller that slowly increases injection as boost builds, resulting in smooth and seemless operation. To tap into the manifold for vacuum and boost readings, the custom designed and CNC machined billet aluminum Weistec Vacuum/Boost Adapter is included, simplifying boost reference installation. The included Weistec Silicone Turbo Charge Pipes each have a built in port for the Weistec Barbed Injector Body, allowing the use of two injectors for uniform injection and cooling. The combination of the cooling effects of methanol and the knock resistance of water result in significant gains(through improved cooling and octane) in horsepower and torque as well as reduced chance of heat soaking the intercooler system.

This system is a complete, bolt on system that can be installed with out any guess work or custom fabrication. Weistec has engineered and manufactured many of the components of this system to ensure a simple and straight forward installation that a universal kit simply lacks. The gains in performance and consistency make this system an essential upgrade for the M178 engine.

  • Reduced intake air temperatures
  • Increased knock/detonation resistance
  • 20-80 HP gain
  • 4 Ply silicone charge pipes with integraded injector ports
  • Weistec vacuum/boost adapter CNC machined out of billet aluminum
  • Water/Methanol Controller with built in MAP sensor
  • Dual Weistec CNC machined injectior bodies with built in check valves
  • Small, medium and large quantity injection nozzles included for a wide range of configuration
  • Tank with integrated level sensor (actual tank my vary from images)
  • High quality quick disconnect fittings
  • Designed for 50/50 water and methanol mixture
  • Compatible with stock, W.3 and W.4 turbochargers
  • All hardware and gaskets are included
  • Engine: M178
  • Mercedes-Benz C190 AMG GT 15-20
  • Mercedes-Benz C190 AMG GT C 17-20
  • Mercedes-Benz C190 AMG GT R 17-20
  • Mercedes-Benz C190 AMG GT S 15-20
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Vehicle Engine Notes
Mercedes-Benz AMG GT

Mercedes-Benz AMG GT R

Mercedes-Benz AMG GT S

Based out of Orange County California, Weistec Engineering is an industry leader in research, development, and design. Weistec has grown to provide customers with the highest level of satisfaction and value through relentless testing and continuous improvements in product and performance.

Specializing in computer aided design, and vehicle calibration, Weistec has the ability to manufacture quality products that are able to withstand even the most rigorous testing. From OEM vehicle manufacturers to the aftermarket performance enthusiast we aim to deliver innovative solutions that address a client’s needs.

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