BMW B58 Water Methanol Injection
Methanol injection comes with a handful of benefits, but it’s not without risk. In this guide, we discuss the benefits, risks, and power gains of B58 WMI kits. We also touch on a few of our favorite kits on the market for the B58.
B58 Water Methanol Injection Benefits
Benefits of running a B58 methanol injection kit include:
- Power gains
- Cooling benefits
- Knock suppression
- Acts as additional fueling
Many choose to run WMI for its performance and power benefits. Methanol injection horsepower gains on the B58 can vary from roughly 20whp up to 100+whp. A lot depends on mods and tuning goals. With a conservative tune on the stock turbo the B58 may only pick up 20whp. On the other hand, aggressive tuning with an upgraded turbo may show gains in excess of 100whp.
However, the benefits of WMI extend beyond just the power gains. Water methanol injection helps cool intake and internal engine temperatures. This in part helps reduce the chance of engine knocks. Additionally, methanol acts as fueling which means fuel demands from gasoline and E85 are reduced. The benefits of B58 WMI are actually very similar to E85. However, E85 increases demand on the fuel system while methanol injection decreases demand.
WMI offers many benefits for the B58 engine, and most will be enticed by the impressive power gains. Benefits of methanol are similar to those of E85 or high octane race fuels. Though, unlike E85, methanol actually reduces demand on the fuel system. WMI does come with a few risks that should be considered. Ultimately, many risks can be mitigated with a proper setup and tuning, good integration, and fail-safes.