I thought some of you in the early stages of designing your fuel system might be interested in this article on “Returnless” fuel system.  I have one that approaches it in concept in that no fuel is returned to a fuel tank (but, I do cheat a bit with a ½ pint header tank on the FW that the injector unused fuel is returned to- but it approaches the mechanical type mentioned in the extract below).  But, in any case, I thought the article might be of interest

Ed

Actually, there are two different types of returnless EFI systems in use: mechanical and electronic. In the mechanical systems, a mechanical regulator is mounted on the fuel pump module to provide a more or less constant fuel pressure to the engine. This type of setup works well with a speed-density EFI system that uses throttle position, intake manifold pressure and engine rpm to determine engine load rather than an airflow sensor.

http://www.underhoodservice.com/Article/46468/Point_of_N.aspx

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm