Boostage

If any one is interested in how water behaves inside a plenum, this video will give you some idea:

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urbansi

thats ******* crazy!!!!!!!!!!!!

So not to be a dick, but whats the point to showing this, is there some kind of testing with this or just something that you found interesting.

tony1

I'm curious, from watching that video, can you explain how water acts in a plenum? I couldn't get anything from it.

non-VTEC

someone correct me if im wrong but the purpose of water injection is to cool the intake charge......its injected at high pressure as a "mist" and should evaporate quickly before entering the combustion chamber.

looking at that video clip is looks like its sucking in water like crazy........that cant be good.....or am i wrong?

Tony the Tiger

Looks like the water isn't really well atomized from the video, but it could be a "dead spot" within the plenum so the water just sits there and builds up (and twirls around). I am thinking in order to make the sight glass, they has to extend the plenum too much from the ports so there is a dead spot between the sight glass and the last runner/velocity stack.

If the sight glass was fabricated right at the top of the plenum with all four runners/stacks visible, then it would be pretty cool to see how the mist gets sucked into the engine (from a top view)

Tony the Tiger

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">someone correct me if im wrong but the purpose of water injection is to cool the intake charge......its injected at high pressure as a "mist" and should evaporate quickly before entering the combustion chamber.

looking at that video clip is looks like its sucking in water like crazy........that cant be good.....or am i wrong?</TD></TR></TABLE>

There are two main benefits from water.. The side benefit (from a good atomized spray) is the ability to cool of IAT's when the air stream turns water into vapour. The real key benefit of anti-detonation property would be water being "combusted" when entered in the engine. Water can't be burned, and it takes a lot of heat to vapourize the water inside the chambers. This in turn cools down the air/fuel mixture by a lot, and prevent heat spikes. The water doesn't even have to be that fine of a spray especially when guys begin to spray huge amounts of water in really high power setups (upwards of 15-20% of fuel mass)