Some have a pressure relief valve, but running the pump will also usually flood the engine. Airflow Performance has a manual purge valve so you can circulate fuel through the flow divider back to the tank, but that still doesn't cool the stainless steel lines from the flow divider to the cylinders. It seems like every injected engine has it's own technique that it wants for a hot start. Once you learn what your engine needs, it isn't a big deal. Until you figure it out, it can be a bear.
-Jeff Scott ---------- Original Message ---------- Jeff, correct me if I am wrong, but don't fuel injected engines typically have a return line back to the tank because the system has to be at a constant pressure, so under low load or idle situations fuel is being dumped bank into the tank? If so, couldn't the fuel pump be allowed to run a few minutes to recirculation the fuel so it doesn't boil? Maybe someone else will better knowledge than me on this. Fred Johnson Reno, NV Jeff Scott wrote: Vapor lock is common in almost all fuel injected aircraft engines, but it's not the gascolator that overheats. It's because the fuel injection distribution block is sitting on top of the hot engine, so gets heated enough to easily boil the fuel following engine shut down. Thus the hot start problems with most injected aircraft engines. In flight it is cooled by the air intake on top of the engine, so never vapor locks once there is sufficient cooling air moving through the air inlets. _______________________________________ 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 ____________________________________________________________ Art School The Art Institutes. Get info on the design program today! http://thirdpartyoffers.juno.com/TGL2141/c?cp=hg2dQJV8dSb_fAldfsiGxgAAJ1A9mk8a0luj1TJO2sh3zRLgAAQAAAAFAAAAAJqZGT4AAAMlAAAAAAAAAAAAAAAAAAhBOAAAAAA=
