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I think water injection would be useful on an undersized-for-the job engine, ie putting a 2L engine into a Suburban with about 20 psi boost. It also would almost be a necessity if pushing a diesel to redline is a common occurance; water injection would bring down the exhaust gas temps very nicely.
But for cruising down the interstate, I kinda doubt it. But I do wonder what the effect having extra water vapor in the exhaust would be.
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 RIP Maxima 1997-2012
Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
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