At the expense of boring those of you who already know all this, thought I would throw in my
$ 0.02 worth of useless info.
In my not unsubstantial and varied readings and studies of air, oil and coolant flow pertaining to making my hot rodded Mustang faster and more reliable at the road course, there are many automotive systems that parallel dust collection. This includes cylinder head, intake and exhaust performance, aerodynamics (to do with generating downforce (or at least reducing/eliminating lift), coolant and oil flow inside the engine and within the cooling systems like coolers, radiators; braking system performance and air flow to cool them (duct work) etc etc.
When viewing the entire dust collection / shop vac / cyclonic scenarios and the difference between dust collector and vacuum cleaners, here are a few points I would like to mention:
The suction difference between the two systems makes a huge impact on the effectiveness (our only real concern being that it works) and efficiency of whatever it is we cobble together; flow potential and pressure vs volume..............that is the crux.
Elbow radius and neck down dimensions and curve design radically affect flow, as does the diameter and shape of the pipe / hose....smooth is good - ribbed is not. Insie outsie or outsie insie conncetions - think of the flow of air and the dust floating in the liquid.......yes Grasshopper..... air is a liquid.
Because dust collectors have very low pressure differential (suction) they require much greater unrestricted CFM of airflow. Going from a 4" to a 5" or 6" pipe on a D/C radically improves the performance over long runs - think HVAC systems with your furnace and a/c. This is why real dust collectors don't use bags - they may flow a ton for the first minute, but once they are full of dust, the outlet side of the D/C is restricted - meaning you can run sewer pipe, and your D/C system will still (not) suck......lol...see what I did there?
Here is my practical inclination to most of these highly complex problems and challenges.....without renting a wind tunnel (altho that is possible @ $2500/hr), doing your best on minimizing the compromises (like using Y adaptors not T fittings for example).
I figured that air flow can be controlled via waste gates - lots of times, less suction and more flow will actually pickup more of the dust - think air inlet on a router enclosure - not only from the top, but usually clean air to also draw across the router motor (to keep it cool) and to essentially create a main flow (river) of air the will then pull the additional air (and dust) along its path. Pls see Gr 3 level pic attached.
Reduce restrictions (on both sides of the pump; inlet and outlet; just like a cars engine) and reduce turbulence and you improve efficiency...........works on everything from air intakes, cylinder head flow, engine cooling and oiling systems, making your F1 car faster.......and improving your D/C effectiveness.
The challenge is to maximize the workings of whatever setup we are stuck with due to the various insurmountable factors - sooooo...... think about adjustability/variability to see what works best FOR YOUR SETUP.
Hoping this gets everyone thinking a little bit. Gotta say, I really enjoy being a (virgin) member on this forum, so much knowledge and skill set as well as friendly faces and comments.
Last edited by tulowd; 03-17-2019 at 09:35 AM.