---------------------------------------------------------- RV4-List Digest Archive --- Total Messages Posted Fri 10/24/03: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:02 AM - Re: Autogas (rob ray) 2. 05:37 PM - >Re:Auto Gas (Oldsfolks@aol.com) 3. 10:22 PM - Re: >Re:Auto Gas (Hank Landman) 4. 10:22 PM - Re: >Re:Auto Gas (Hank Landman) ________________________________ Message 1 _____________________________________ Time: 07:02:33 AM PST US From: rob ray Subject: Re: RV4-List: Autogas --> RV4-List message posted by: rob ray I got mine from an aircraft salvage yard right off a Cherokee 140. It's a shroud with a 1" scat fitting on it. Works great. You also could run a blast tube right to it from the baffling, should work fine. The most importatnt consideration is the fuel line proximity to exhaust pipes. Try to shield them if possible. You can get shields out of Aircraft Spruce...Also in the back of the RV4 builders manual is the drawing for a vapor return line system for your fuel lines... RR Steve Mullins wrote: --> RV4-List message posted by: "Steve Mullins" I want to thank you all for the many great suggestions regarding my mogas problems. I am pretty sure vapor lock is the source. Any ideas about how to better protect/insulate the mechanical fuel pump on my 0-290 from heat? I have two blast tubes routing air to it. Are there materials that can be used to fabricate some sort of insulating 'cocoon'around the pump? --------------------------------- ________________________________ Message 2 _____________________________________ Time: 05:37:14 PM PST US From: Oldsfolks@aol.com Subject: RV4-List: >Re:Auto Gas --> RV4-List message posted by: Oldsfolks@aol.com I hope you have an electric auxiliary fuel boost pump in your plane. With the aux. pump ON the fuel line is pressurized to the engine driven pump and vapor lock incidence is minimized. A facet 3-4 pound pump is right for carbureted engines. You don't want to insulate the engine driven pump - it gets heat transfer from the engine case. As Rob said,you want blast air to cool the pump. My opinion, Bob Olds A&P , EAA Tech. Counselor RV-4 , N1191X , Flying Now Charleston, Arkansas "Real Aviators Fly Taildraggers" ________________________________ Message 3 _____________________________________ Time: 10:22:54 PM PST US From: "Hank Landman" Subject: Re: RV4-List: >Re:Auto Gas --> RV4-List message posted by: "Hank Landman" ----- Original Message ----- From: Subject: RV4-List: >Re:Auto Gas > --> RV4-List message posted by: Oldsfolks@aol.com > > I hope you have an electric auxiliary fuel boost pump in your plane. With the > aux. pump ON the fuel line is pressurized to the engine driven pump and vapor > lock incidence is minimized. > A facet 3-4 pound pump is right for carbureted engines. > You don't want to insulate the engine driven pump - it gets heat transfer > from the engine case. As Rob said,you want blast air to cool the pump. > My opinion, > > > Bob Olds A&P , EAA Tech. Counselor > RV-4 , N1191X , Flying Now > Charleston, Arkansas > "Real Aviators Fly Taildraggers" > > ________________________________ Message 4 _____________________________________ Time: 10:22:54 PM PST US From: "Hank Landman" Subject: Re: RV4-List: >Re:Auto Gas --> RV4-List message posted by: "Hank Landman" ----- Original Message ----- From: Subject: RV4-List: >Re:Auto Gas > --> RV4-List message posted by: Oldsfolks@aol.com > > I hope you have an electric auxiliary fuel boost pump in your plane. With the > aux. pump ON the fuel line is pressurized to the engine driven pump and vapor > lock incidence is minimized. > A facet 3-4 pound pump is right for carbureted engines. > You don't want to insulate the engine driven pump - it gets heat transfer > from the engine case. As Rob said,you want blast air to cool the pump. > My opinion, > > > Bob Olds A&P , EAA Tech. Counselor > RV-4 , N1191X , Flying Now > Charleston, Arkansas > "Real Aviators Fly Taildraggers" > >