methaneb
11-03-2009, 11:54 AM
I wanted to make this a separate post so as to not get lost in / interfere with the general WVI discussion.
Water Vapor Injection looks like it would be a huge benefit for my gas guzzling Chevy Pickup. I tried a little experiment on it today and it seems promising. Here's the dilemma.
The truck has a Throttle Body Injected 350 5.7L. The intake manifold is very similar to that of a carbureted vehicle, and has the same style of air cleaner. I cut away the air cleaner housing beyond where it seals to the filter, and put a K&N filter on it.. so the filter is exposed all the way around (I am planning to add a hood scoop to push cold air to it) . The only place to tap in before the throttle body would be in the air filter lid... but I would have no way to restrict the air filter to create much vacuum there.
However, there is a very strong vacuum source beyond the throttle butterfly, where the PCV gases are pulled into the intake manifold. I wonder if maybe I could hook up a T fitting to that line, so that that manifold vacuum would be divided between my WVI system and the PCV system. I could then tap the WVI fresh air intake into the PCV fresh air intake much in the same way. That way the the manifold pressure is not altered by the system.
Anyone familiar with these motors? Does this sound viable? Typically the flow of a PCV system slows down the more the throttle is opened, but the manifold vaccuum on this truck remains fairly strong all the way up to full throttle (there is some noticeable loss, however).
The key downside to this, is that the WVI system would be MOST active at idle, and LEAST active at full throttle, which is somewhat backwards behavior... but I don't know how else I would do it.
Anyone got any ideas?
Water Vapor Injection looks like it would be a huge benefit for my gas guzzling Chevy Pickup. I tried a little experiment on it today and it seems promising. Here's the dilemma.
The truck has a Throttle Body Injected 350 5.7L. The intake manifold is very similar to that of a carbureted vehicle, and has the same style of air cleaner. I cut away the air cleaner housing beyond where it seals to the filter, and put a K&N filter on it.. so the filter is exposed all the way around (I am planning to add a hood scoop to push cold air to it) . The only place to tap in before the throttle body would be in the air filter lid... but I would have no way to restrict the air filter to create much vacuum there.
However, there is a very strong vacuum source beyond the throttle butterfly, where the PCV gases are pulled into the intake manifold. I wonder if maybe I could hook up a T fitting to that line, so that that manifold vacuum would be divided between my WVI system and the PCV system. I could then tap the WVI fresh air intake into the PCV fresh air intake much in the same way. That way the the manifold pressure is not altered by the system.
Anyone familiar with these motors? Does this sound viable? Typically the flow of a PCV system slows down the more the throttle is opened, but the manifold vaccuum on this truck remains fairly strong all the way up to full throttle (there is some noticeable loss, however).
The key downside to this, is that the WVI system would be MOST active at idle, and LEAST active at full throttle, which is somewhat backwards behavior... but I don't know how else I would do it.
Anyone got any ideas?