Thanks Colin: Jim ----- Original Message ----- From: "Colin & Bev Rainey" <crain...@cfl.rr.com> To: <kr...@mylist.net> Sent: Wednesday, May 18, 2005 2:49 PM Subject: KR> Fuel injection
> Jim and netters > This is why I have said that if you are not familiar you really need to > get schooling on why things are done the way they are in fuel injection > different from carbs. > > The return line from the pressure regulator side MUST return to the fuel > tank, below or at the pickup point (fuel level) to allow proper > recirculation so that the fuel pump which is also cooled by the fuel it is > pumping can be prevented from over heating and short life, and to prevent > aeration of the fuel (bubbling). Typically the fuel pumps required to make > a fuel injection system work properly must pump alot more volume and > pressure and get MUCH hotter internally than carb pumps do, and is why so > many manufacturers went to installing them inside the fuel tanks. The fuel > acts to cool the pumps along with a constant recirculation and the pump is > always primed being immersed in fuel (unless you are out). > > Your system is providing a circulation loop, but will tend to send fuel > both ways in your lines, potentially starving the system under > acceleration. Look at ALL systems on cars and light trucks; they all > recirculate back to the tank. Ford trucks went through a huge problem with > their multi tank system, where the checking valve that was supposed to > keep the fuel coming from the correct tank would malfunction causing the > fuel to be pumped back into the other tank, instead of to the engine. > Positive selection, individual check valves, and proper line organization > are just some of the considerations. > > Colin > Sanford, FL > > Ordered almost all support parts from Clarks Corvairs for the KRvair > engine this morning. Sights are set on a mid June fire up! > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
