can you do this to your engine with tbi?
https://www.thirdgen.org/messgboard/...ML/008904.html
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is that even a good thing to do?

 

Actually yes,

While water in your engine is extremely bad in large quantities a little water can be beneficial. Remember that water is the product of the combustion of hydrocarbons:

HC + 02 ----> H20 + C02 + Heat

Also if you look at alot of high boost turbocharger and supercharger applications (over 20 lbs of boost) you'll see that they utilize water or isopropyl alcohol injection systems. The water serves to lower combustion chamber temperatures and fight detonation without using extremely expensive racing fuel. I used to research this stuff alot when I was considering putting a turbo on a 16 valve normally respirated Volvo 4 banger. The compression ratio was already 10.5:1 so under full boost I'd need 110 octane or something like that...so the water/alcohol injection system would have been the way to go-but then I just said "screw it, I'm dropping a V8 in!"

Later,

Matthew C. Hall

 

so if water is so go than how do we put it in our engines?