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      08-27-2011, 10:18 AM   #3
joeo
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Drives: 2009 Crimson Red 135i
Join Date: Mar 2008
Location: Sterling, Va

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2009 BMM 135i  [9.50]
It is for injecting water into a turbocharged engine, typically right before the throttle body. In addition, you can modify the setup to spray water onto the intercooler (like the STi and EVO) if you so desired.

The pump that is used here can support up to a 50% alcohol water mixture. The manufacture says that the internal seals can swell at higher alcohol levels. If you want to run 100% alcohol, a different pump is needed. The other components in the setup can handle alcohol.

On my personal MR2 turbo, the results with just water were impressive. I could run at least 4 more psi of boost (up from 16psi) with water injection. The limit being detonation. The advantage of running alcohol is your injecting additional high-octane fuel. Straight water will give you the best protection against detonation.

-Joe
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