---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Tue 09/11/12: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:27 AM - Fuel pump cooling (Ralph E. Capen) 2. 06:14 AM - Re: Fuel pump cooling (Michael Kraus) 3. 06:39 AM - Re: Fuel pump cooling (Ralph E. Capen) 4. 07:33 AM - Re: Fuel pump cooling (mr.gsun@gmail.com) 5. 07:33 AM - Re: Fuel pump cooling (Michael Kraus) 6. 07:59 AM - Re: Fuel pump cooling (Ralph E. Capen) ________________________________ Message 1 _____________________________________ Time: 04:27:49 AM PST US From: "Ralph E. Capen" Subject: RV-List: Fuel pump cooling For those of you that have installed a cooling shroud on your fuel pump, are you using the entire inch diameter for the flange hole to steal the air? Is it enough / too much? I'm thinking I might open it the full inch and put inserts to reduce it...but then how do I know what's enough..... Ralph ________________________________ Message 2 _____________________________________ Time: 06:14:38 AM PST US Subject: Re: RV-List: Fuel pump cooling From: Michael Kraus I used the 3/4" Vans corrugated cooling tube. It fits nicely inside the cooling shroud inlet. Not sure if I have too little cooling. It seems to work well on my RV-10 -Mike Kraus RV-10 Flying Sent from my iPhone On Sep 11, 2012, at 7:27 AM, "Ralph E. Capen" wrote: > > For those of you that have installed a cooling shroud on your fuel pump, are you using the entire inch diameter for the flange hole to steal the air? Is it enough / too much? > > I'm thinking I might open it the full inch and put inserts to reduce it...but then how do I know what's enough..... > > Ralph > > > > > > ________________________________ Message 3 _____________________________________ Time: 06:39:07 AM PST US From: "Ralph E. Capen" Subject: Re: RV-List: Fuel pump cooling Mike, Thanks for the info - I'm guessing that you don't have any hot-start problems or other evidence of vapor-lock. This would seem to be a good starting point... Ralph -----Original Message----- >From: Michael Kraus >Sent: Sep 11, 2012 9:13 AM >To: "rv-list@matronics.com" >Subject: Re: RV-List: Fuel pump cooling > > >I used the 3/4" Vans corrugated cooling tube. It fits nicely inside the cooling shroud inlet. > >Not sure if I have too little cooling. It seems to work well on my RV-10 > >-Mike Kraus >RV-10 Flying > >Sent from my iPhone > >On Sep 11, 2012, at 7:27 AM, "Ralph E. Capen" wrote: > >> >> For those of you that have installed a cooling shroud on your fuel pump, are you using the entire inch diameter for the flange hole to steal the air? Is it enough / too much? >> >> I'm thinking I might open it the full inch and put inserts to reduce it...but then how do I know what's enough..... >> >> Ralph >> >> >> >> >> >> > > ________________________________ Message 4 _____________________________________ Time: 07:33:34 AM PST US Subject: Re: RV-List: Fuel pump cooling From: mr.gsun@gmail.com I have been following this fuel pump cooling thread and wonder if I need to cool my pump. My RV7 has fuel injection with no return line and a black cowl. If I'm not careful on a hot day, it is tough to restart after a short shutdown. Does cooling the pump during flight do anything to reduce the heat soaking of the fuel & lines during the shut down? I was wondering about perhaps some race car insulation on the injector lines coming out of the spider on top of the engine. Question is, though, is it worth it? Has anyone found it makes a difference? Greg do not archive On Tue, Sep 11, 2012 at 6:38 AM, Ralph E. Capen wrote: > > Mike, > > Thanks for the info - I'm guessing that you don't have any hot-start > problems or other evidence of vapor-lock. > > This would seem to be a good starting point... > > Ralph > > > -----Original Message----- > >From: Michael Kraus > >Sent: Sep 11, 2012 9:13 AM > >To: "rv-list@matronics.com" > >Subject: Re: RV-List: Fuel pump cooling > > > > > >I used the 3/4" Vans corrugated cooling tube. It fits nicely inside the > cooling shroud inlet. > > > >Not sure if I have too little cooling. It seems to work well on my RV-10 > > > >-Mike Kraus > >RV-10 Flying > > > >Sent from my iPhone > > > >On Sep 11, 2012, at 7:27 AM, "Ralph E. Capen" > wrote: > > > >> > >> For those of you that have installed a cooling shroud on your fuel > pump, are you using the entire inch diameter for the flange hole to steal > the air? Is it enough / too much? > >> > >> I'm thinking I might open it the full inch and put inserts to reduce > it...but then how do I know what's enough..... > >> > >> Ralph > >> > >> > >> > >> > >> > >> > > > > > > > > > > > > ________________________________ Message 5 _____________________________________ Time: 07:33:34 AM PST US Subject: Re: RV-List: Fuel pump cooling From: Michael Kraus I have an RV-10 with a fuel purge valve. So hot starts are not a problem. No idea how much the fuel pump air helps, but Logic says it has to. -Mike Sent from my iPhone On Sep 11, 2012, at 9:38 AM, "Ralph E. Capen" wrote: > > Mike, > > Thanks for the info - I'm guessing that you don't have any hot-start problems or other evidence of vapor-lock. > > This would seem to be a good starting point... > > Ralph > > > -----Original Message----- >> From: Michael Kraus >> Sent: Sep 11, 2012 9:13 AM >> To: "rv-list@matronics.com" >> Subject: Re: RV-List: Fuel pump cooling >> >> >> I used the 3/4" Vans corrugated cooling tube. It fits nicely inside the cooling shroud inlet. >> >> Not sure if I have too little cooling. It seems to work well on my RV-10 >> >> -Mike Kraus >> RV-10 Flying >> >> Sent from my iPhone >> >> On Sep 11, 2012, at 7:27 AM, "Ralph E. Capen" wrote: >> >>> >>> For those of you that have installed a cooling shroud on your fuel pump, are you using the entire inch diameter for the flange hole to steal the air? Is it enough / too much? >>> >>> I'm thinking I might open it the full inch and put inserts to reduce it...but then how do I know what's enough..... >>> >>> Ralph >>> >>> >>> >>> >>> >>> >> >> >> >> >> > > > > > > > ________________________________ Message 6 _____________________________________ Time: 07:59:33 AM PST US From: "Ralph E. Capen" Subject: Re: RV-List: Fuel pump cooling Like Mike I have the purge valve. I use the purge valve for hot-restarts and the pump cooler would start cooling the pump immediatel after restart which would prevent ongoing issues. I do get a little roughness right after a hot-restart and I have been running the rpm up to combat that...I think this will help - hence its installation. The only thing that it would help would be to remove heat when the engine is actually running. Without an auxilliary blower, nothing happens when the engine's not running. -----Original Message----- From: mr.gsun@gmail.com Sent: Sep 11, 2012 10:32 AM Subject: Re: RV-List: Fuel pump cooling I have been following this fuel pump cooling thread and wonder if I need to cool my pump. My RV7 has fuel injection with no return line and a black cowl. If I'm not careful on a hot day, it is tough to restart after a short shutdown. Does cooling the pump during flight do anything to reduce the heat soaking of the fuel & lines during the shut down? I was wondering about perhaps some race car insulation on the injector lines coming out of the spider on top of the engine. Question is, though, is it worth it? Has anyone found it makes a difference? Greg do not archive On Tue, Sep 11, 2012 at 6:38 AM, Ralph E. Capen wrote: Mike, Thanks for the info - I'm guessing that you don't have any hot-start problems or other evidence of vapor-lock. This would seem to be a good starting point... Ralph -----Original Message----- >From: Michael Kraus >Sent: Sep 11, 2012 9:13 AM >To: "rv-list@matronics.com" >Subject: Re: RV-List: Fuel pump cooling > > >I used the 3/4" Vans corrugated cooling tube. It fits nicely inside the cooling shroud inlet. > >Not sure if I have too little cooling. It seems to work well on my RV-10 > >-Mike Kraus >RV-10 Flying > >Sent from my iPhone > >On Sep 11, 2012, at 7:27 AM, "Ralph E. Capen" wrote: > >> >> For those of you that have installed a cooling shroud on your fuel pump, are you using the entire inch diameter for the flange hole to steal the air? Is it enough / too much? >> >> I'm thinking I might open it the full inch and put inserts to reduce it...but then how do I know what's enough..... >> >> Ralph >> >> >> >> >> >> > > ========== get="_blank">http://www.matronics.com/Navigator?RV-List ========== http://forums.matronics.com ========== le, List Admin. ="_blank">http://www.matronics.com/contribution ========== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.