Compression Ignition Addict
Join Date: Oct 2008
Location: Hudson Valley, NY region
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OP, you won't be disappointed with any open bowl design that you buy. They all work the same. The oil drips into the bowl, gets spun around and the water and crud pushes to the wall. The clean oil moves to the center and spills over the lip to get captured by your outer container. The clean oil drains into your clean storage vessel. When you shut down the motor, the water and crud drains out of the bowl into your dirty capture vessel. IMO, the WVO Designs system is great. I've used it to spin about 2000 gallons with good results and no problems. But everyone with the other CFs are just as happy with theirs and some of them have been doing it longer than me.
You'll need to rig up a way to pre-heat the oil before it hits the bowl. It's not hard to do and two of the CF manufs have the feature built in. Just make sure it's a "sump" design where the oil goes in the bottom of the heater and out of the top - this way if for some reason the heater is on and the oil in your gravity feed vessel runs out, you still have oil in contact with the heater and it won't catch fire and burn down your garage.
Another differentiater is a feed cone. Simple's and WVO's both have it. I just added WVO's feed cone to mine (the "booster") and it does appear to get the oil cleaner. Previously, I just had extended the dirty oil drip line down to the bottom of the bowl. This helps to introduce the oil to the bowl more gently. But you still get some "splashing" or "mixing" or "bouncing" of the dirty oil as it enters the column of spinning oil in the side of the bowl. The feed cone introduces the oil down at the bottom of the column so you don't have such a violent mixing reaction. So, as you build your system, you should probably try to incorporate that feature - it works better.
A clear lid would be cool. I would like to have a clear lid on mine to see what's going on. Either way, have your venting sorted out before you build your system. With wet oil, you'll get vapor from the CF. You don't want that mixing with your cleaned oil, so a vent or two in the lid will help route the vapor. Also, set up your clean drain line as a "sump" so that it remains filled with oil right up to the CF. Then, there's no chance for the vapor to escape down your clean drain line and end up as water in your clean storage barrel.
Good luck with your filtration project!
'02 7.3L Excursion Limited; ~225Kmi total; ~140Kmi on WVO
Vegistroke V3 (4/09); HIH, Aux Pump, FPHE (11/10); PHP Gryphon custom; 6637;
WW; Turbomaster; EBPV delete; 4" exhaust; Terminator HPOP; Tru-cool; Evans NPG+;
ARI triple-disc TC; V/B-code springs; Bilsteins; 30mm sway bar; 190A alternator; F650 dash, etc.