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Didn't some of the Cummins trucks pull/suck the fuel from the tank and later pumps push with an in-tank pump, like the deuce? Seems like vacuum is an issue...

I emailed FASS and asked about making my own tee vs. buying theirs and got a rude reply, but there are a couple nuggets in this article. Dirty fuel filters don't just starve your engine for fuel, they cause it to suck air, which is probably the cause of a lot of the bucking and surging, etc...

Diesel trucks as built seem to work fine...but it seems they can work a little better. I wouldn't spend several hundred dollars to buy a kit to remove air, but if I can do it myself on the cheap, it would be a fun and interesting project. I read somewhere that diesel engines and components...

Here's a good visual. http://youtu.be/ujokaEkF8Z0

I have no intention of buying expensive filters...I dont think that's the key, it's the .020"-.040" bleeder orifice into the return line. I can make that myself with a tee, etc.

Large pockets cause problems and damage, but according to what I've read, the injectors should last longer, work better, and engine run better if the tiny entrained bubbles are removed. Author of above article says it's best done with a small orifice in the top of the line just before injection.

I don't think letting bubbles out after injection is the same as removing entrained air before...

...an air separator? Really?

Cool, but I'm more interested in the benefits of removing entrained air...

I was thinking it would be pretty easy (I have a machine shop) to put an orifice in a tee right before the Hyd Head and run it into the return.

Bumping this up, anyone tried an air removal system yet? Thinking about building a poor man's version from this info. http://www.parker.com/literature/Racor/Mobile_Air_Separation_In_Diesel_Fuel.pdf