AeroElectric-List Digest Archive

Sun 11/13/11


Total Messages Posted: 12



Today's Message Index:
----------------------
 
     0. 12:34 AM - Make Sure You're Listed! List of Contributors Published in December! (Matt Dralle)
     1. 05:10 AM - Re: Fuel (boost) pump (Dan Sherburn)
     2. 05:35 AM - Re: Fuel (boost) pump (Charlie England)
     3. 07:00 AM - Re: Fuel (boost) pump (Robert L. Nuckolls, III)
     4. 08:24 AM - Re: Fuel (boost) pump (Dj Merrill)
     5. 09:03 AM - Re: Fuel (boost) pump (Charlie England)
     6. 10:02 AM - Re: Fuel (boost) pump (cdnch701)
     7. 12:18 PM - Re: Fuel (boost) pump (Charlie England)
     8. 01:38 PM - Re: Fuel (boost) pump (cdnch701)
     9. 02:00 PM - Re: Fuel (boost) pump (Charlie England)
    10. 03:22 PM - Re: Fuel (boost) pump (Dan Sherburn)
    11. 03:22 PM - Re: Fuel (boost) pump (cdnch701)
 
 
 


Message 0


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    Time: 12:34:24 AM PST US
    From: Matt Dralle <dralle@matronics.com>
    Subject: Make Sure You're Listed! List of Contributors Published
    in December! Dear Listers, The List of Contributors (LOC) is just around the corner! In December I post a list of everyone that so generously made a Contribution to support the Lists. Its my way of publicly thanking everyone that took a minute to show their appreciation for the Lists. Won't you take minute and assure that your name is on the upcoming LOC? Tell others that you appreciate the Lists. Making a Contribution to support the Lists is fast and easy using your Visa, MasterCard, or Paypal account: http://www.matronics.com/contribution Or, drop a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 USA I would like to thank everyone that has so generously made a Contribution thus far during this year's List Fund Raiser! Remember that its YOUR support that keeps these Lists running and improving! Don't forget to include a little comment about how the Lists have helped you! Thank you! Matt Dralle Matronics Email List Administrator


    Message 1


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    Time: 05:10:59 AM PST US
    From: "Dan Sherburn" <dsherburn@att.net>
    Subject: Re: Fuel (boost) pump
    I haven't purchased an engine yet but plan on using an O-200 (perhaps the O-235) on the CH750, which is a high wing design. Fuel tank is in the wing, so it's essentially gravity feed. Reading "Firewall Forward", because of the gravity feed and the mechanical fuel pump I technically may not even need one. I plan to use one, however. ----- Original Message ----- From: Tim Andres To: aeroelectric-list@matronics.com Sent: Sunday, November 13, 2011 12:37 AM Subject: Re: AeroElectric-List: Fuel (boost) pump What engine/ fuel system are you boosting? Tim ------------------------------------------------------------------------- ----- From: Dan Sherburn <dsherburn@att.net> To: aeroelectric-list@matronics.com Sent: Sat, November 12, 2011 6:59:48 PM Subject: AeroElectric-List: Fuel (boost) pump I'm putting together an electrical load analysis spreadsheet and can find most continuous and intermittent electrical loads for the devices I've selected. I'm building a Zenith CH750 that will be simple day VFR. I do know, however, I'll be using a fuel boost pump and I'm finding I'm not sure how to pick one out. What are folks typically using as fuel boost pumps? This will allow me to research the elelctrical load requirements. Also, I'm assuming about 600ma cont. load from my "master" solenoid and about 4a intermittent from my starter solenoid load. Does that sound about right? Thanks in advance, Dan Sherburn


    Message 2


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    Time: 05:35:35 AM PST US
    From: Charlie England <ceengland@bellsouth.net>
    Subject: Re: Fuel (boost) pump
    https://www.pegasusautoracing.com/productdetails.asp?RecID=8440 Google 'facet fuel pump'. Above is a typical cube type pump made by Facet for small/medium hp carb'd engines. According to the Pegasus link, it draws about 1 amp at 12 volts. Ask a local A&P about O-200's on certified high wing planes; I'll bet almost none actually have fuel pumps. I know that the Luscombe 8A I learned to fly in didn't have one on its 65hp version (no electrical system). The real test would be, what does Zenith say? Charlie On 11/13/2011 7:05 AM, Dan Sherburn wrote: > I haven't purchased an engine yet but plan on using an O-200 (perhaps > the O-235) on the CH750, which is a high wing design. Fuel tank is in > the wing, so it's essentially gravity feed. Reading "Firewall > Forward", because of the gravity feed and the mechanical fuel pump I > /technically /may//not even need one. I plan to use one, however. > > ----- Original Message ----- > *From:* Tim Andres <mailto:tim2542@sbcglobal.net> > *To:* aeroelectric-list@matronics.com > <mailto:aeroelectric-list@matronics.com> > *Sent:* Sunday, November 13, 2011 12:37 AM > *Subject:* Re: AeroElectric-List: Fuel (boost) pump > > What engine/ fuel system are you boosting? > Tim > > ------------------------------------------------------------------------ > *From:* Dan Sherburn <dsherburn@att.net <mailto:dsherburn@att.net>> > *To:* aeroelectric-list@matronics.com > <mailto:aeroelectric-list@matronics.com> > *Sent:* Sat, November 12, 2011 6:59:48 PM > *Subject:* AeroElectric-List: Fuel (boost) pump > > I'm putting together an electrical load analysis spreadsheet and > can find most continuous and intermittent electrical loads for the > devices I've selected. I'm building a Zenith CH750 that will be > simple day VFR. I do know, however, I'll be using a fuel boost > pump and I'm finding I'm not sure how to pick one out. What are > folks typically using as fuel boost pumps? This will allow me to > research the elelctrical load requirements. > Also, I'm assuming about 600ma cont. load from my "master" > solenoid and about 4a intermittent from my starter solenoid load. > Does that sound about right? > Thanks in advance, > D >


    Message 3


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    Time: 07:00:19 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Fuel (boost) pump
    At 07:32 AM 11/13/2011, you wrote: ><https://www.pegasusautoracing.com/productdetails.asp?RecID=8440>https://www.pegasusautoracing.com/productdetails.asp?RecID=8440 > >Google 'facet fuel pump'. >Above is a typical cube type pump made by Facet for small/medium hp >carb'd engines. According to the Pegasus link, it draws about 1 amp >at 12 volts. > >Ask a local A&P about O-200's on certified high wing planes; I'll >bet almost none actually have fuel pumps. I know that the Luscombe >8A I learned to fly in didn't have one on its 65hp version (no >electrical system). > >The real test would be, what does Zenith say? This is an IMPORTANT question. Gravity feed fuel systems are quite common in aviation . . . in airplanes with high wing tanks (a la the 8A) or fuselage tanks behind the firewall line the J-3. These systems get qualified by positioning the airplane at some deck angle at or above that which the airplane can sustain flight and the measuring the gravity fuel flow rates on the as-installed plumbing to make sure the engine is never starved for fuel. Unlike pumped systems, gravity fed systems may have only a few inches of head-pressure of the fuel itself (which is 3/4 as dense as water). ADDING anything in the line through which fuel must flow is a potential restriction. The Facet pumps have double check valves with un-seating pressures that MIGHT not be a problem but if the airplane's design does not call for a pump, I'd be very cautious about adding it . . . or making any other "neat" changes to the fuel delivery system. Bob . . .


    Message 4


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    Time: 08:24:19 AM PST US
    Subject: Re: Fuel (boost) pump
    From: Dj Merrill <deej@deej.net>
    On 11/12/2011 9:59 PM, Dan Sherburn wrote: > I'm building a Zenith CH750 that will be simple day VFR. I do know, > however, I'll be using a fuel boost pump and I'm finding I'm not sure > how to pick one out. What are folks typically using as fuel boost pumps? Hi Dan, I'm in a similar situation. I have a carb'ed high wing Glastar that is currently gravity feed only, and am considering switching the carb to a Rotec TBI unit (http://www.rotectbi.com/). They recommend a boost pump for takeoff, but I don't really know what to pick either. I see Facet pumps for as low as $30 and others over $600. I think we need to find a pump that allows free flow through it when turned off so to use gravity feed in cruise, but can be turned on for takeoff to provide the extra head pressure. Suggestions are welcome... :-) -Dj -- Dj Merrill - N1JOV Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/ Glastar Flyer N866RH - http://deej.net/glastar/


    Message 5


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    Time: 09:03:34 AM PST US
    From: Charlie England <ceengland@bellsouth.net>
    Subject: Re: Fuel (boost) pump
    On 11/13/2011 10:20 AM, Dj Merrill wrote: > On 11/12/2011 9:59 PM, Dan Sherburn wrote: >> I'm building a Zenith CH750 that will be simple day VFR. I do know, >> however, I'll be using a fuel boost pump and I'm finding I'm not sure >> how to pick one out. What are folks typically using as fuel boost pumps? > > Hi Dan, > I'm in a similar situation. I have a carb'ed high wing Glastar > that is currently gravity feed only, and am considering switching the > carb to a Rotec TBI unit (http://www.rotectbi.com/). They recommend a > boost pump for takeoff, but I don't really know what to pick either. > I see Facet pumps for as low as $30 and others over $600. > > I think we need to find a pump that allows free flow through it > when turned off so to use gravity feed in cruise, but can be turned on > for takeoff to provide the extra head pressure. Suggestions are > welcome... :-) > > -Dj Try http://www.facet-purolator.com/index.php & look at the Posi-Flow & Cube (Cube is probably a better choice) lines. http://www.facet-purolator.com/index.php?option=com_content&task=category&sectionid=7&id=16&Itemid=31 <http://www.facet-purolator.com/index.php?option=com_content&task=category&sectionid=7&id=16&Itemid=31> is a chart showing characteristics of the cube pumps. 'Check valve' means that it prevents *back* flow through the pump when the pump is off. This allows plumbing 2 pumps in parallel & running only one at a time. 'Positive shutoff' means that the pump won't flow fuel in the normal direction of flow if the pump isn't running (obviously, *not* what you want). This feature would be useful when used as a transfer pump for an aux tank, for instance, when you want flow only when commanded. Min dry lift means the level that the pump can pull up from a tank to 'self prime'; it shouldn't be an issue if your tank is above the pump (& fuel pickup is on the bottom of the tank). Rotec's page seems to say that any pressure from 1/2psi to 6 psi is ok, so.... pick voltage needed, inlet/outlet type needed, pressure you prefer, connector style desired (that should be fairly flexible on a new install :-) ), & gallons per hr needed (I'd pick at least 30-50% more than max flow for the engine at full rich & full power). As a data point, Van's aircraft uses a Facet in their low-wing RV-12 (light sport legal) to feed the Rotax 912, and the pump runs any time the master is on. Logic is that the pump is so reliable that continuous operation over the life of the engine installation is a reasonable assumption. I'm confident that they'd tell you which model they use if you gave them a call. A second data point (addressing reliability) is that some RV guys are removing the stock Lyc engine pumps & running 2 Facets in parallel (see above). Charlie


    Message 6


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    Time: 10:02:03 AM PST US
    From: cdnch701 <cdnch701@mts.net>
    Subject: Re: Fuel (boost) pump
    Hey Dj... I'm also going with the Rotex TBI-34! With the remote pressure regulator (they recommend a 0.5 - 6.0psi) I will be using two(20) - Facet #40108 inline(no check valves - 4.5- 6.0psi) even though my aircraft is a high wing 701! Van's Aircraft have them for $42 http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1321206508-6-732&browse=engine s&product=pump-carb... Very simple wiring to set up! Ron :--)> On 11/12/2011 9:59 PM, Dan Sherburn wrote: :--)>:--)> :--)>:--)> :--)>:--)> I'm building a Zenith CH750 that will be simple day VFR. :--)>:--)> I do know, however, I'll be using a fuel boost pump and :--)>:--)> I'm finding I'm not sure how to pick one out. What are :--)>:--)> folks typically using as fuel boost pumps? :--)> :--)> :--)> Hi Dan, :--)> I'm in a similar situation. I have a carb'ed high wing :--)> Glastar that is currently gravity feed only, and am considering :--)> switching the carb to a Rotec TBI unit :--)> (http://www.rotectbi.com/). They recommend a boost pump for :--)> takeoff, but I don't really know what to pick either. I see :--)> Facet pumps for as low as $30 and others over $600. :--)> :--)> I think we need to find a pump that allows free flow through :--)> it when turned off so to use gravity feed in cruise, but can be :--)> turned on for takeoff to provide the extra head pressure. :--)> Suggestions are welcome... :-) :--)> :--)> -Dj :--)> :--)> -- :--)> Dj Merrill - N1JOV :--)> Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/ :--)> Glastar Flyer N866RH - http://deej.net/glastar/ :--)> :--)> * AeroElectric www.aeroelectric.com :--)> for your generous support! :--)> --> http://www.matronics.com/contribution


    Message 7


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    Time: 12:18:51 PM PST US
    From: Charlie England <ceengland@bellsouth.net>
    Subject: Re: Fuel (boost) pump
    If I understand the 'no check valve' spec correctly, if 2 are plumbed in parallel you'll be either pumping into the opposite tank (t tanks), or circulating fuel back through the other pump (single tank) when only one is running. ( Unless you're using external check valves.) On 11/13/2011 11:58 AM, cdnch701 wrote: > --> AeroElectric-List message posted by: cdnch701<cdnch701@mts.net> > > Hey Dj... > > I'm also going with the Rotex TBI-34! With the remote pressure regulator (they > recommend a 0.5 - 6.0psi) I will be using two(20) - Facet #40108 inline(no check > valves - 4.5- 6.0psi) even though my aircraft is a high wing 701! Van's Aircraft > have them for $42 > http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1321206508-6-732&browse=engine > s&product=pump-carb... > > Very simple wiring to set up! > Ron > > > :--)> On 11/12/2011 9:59 PM, Dan Sherburn wrote: > :--)>:--)> > :--)>:--)> > :--)>:--)> I'm building a Zenith CH750 that will be simple day VFR. > :--)>:--)> I do know, however, I'll be using a fuel boost pump and > :--)>:--)> I'm finding I'm not sure how to pick one out. What are > :--)>:--)> folks typically using as fuel boost pumps? > :--)> > :--)> > :--)> Hi Dan, > :--)> I'm in a similar situation. I have a carb'ed high wing > :--)> Glastar that is currently gravity feed only, and am considering > :--)> switching the carb to a Rotec TBI unit > :--)> (http://www.rotectbi.com/). They recommend a boost pump for > :--)> takeoff, but I don't really know what to pick either. I see > :--)> Facet pumps for as low as $30 and others over $600. > :--)> > :--)> I think we need to find a pump that allows free flow through > :--)> it when turned off so to use gravity feed in cruise, but can be > :--)> turned on for takeoff to provide the extra head pressure. > :--)> Suggestions are welcome... :-) > :--)> > :--)> -Dj >


    Message 8


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    Time: 01:38:11 PM PST US
    From: cdnch701 <cdnch701@mts.net>
    Subject: Re: Fuel (boost) pump
    Not in parallel... series only! :--)> :--)> If I understand the 'no check valve' spec correctly, if 2 are plumbed in parallel :--)> you'll be either pumping into the opposite tank (t tanks), or circulating fuel back :--)> through the other pump (single tank) when only one is running. ( Unless you're :--)> using external check valves.) :--)> :--)> On 11/13/2011 11:58 AM, cdnch701 wrote: :--)>:--)> :--)>:--)> Hey Dj... :--)>:--)> :--)>:--)> I'm also going with the Rotex TBI-34! With the remote pressure regulator :--)>:--)> (they recommend a 0.5 - 6.0psi) I will be using two(20) - Facet #40108 :--)>:--)> inline(no check valves - 4.5- 6.0psi) even though my aircraft is a high wing :--)>:--)> 701! Van's Aircraft have them for $42 :--)>:--)> http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1321206508-6- :--)>:--)> 732&browse=engine s&product=pump-carb... :--)>:--)> :--)>:--)> Very simple wiring to set up! :--)>:--)> Ron :--)>:--)> :--)>:--)> :--)>:--)> On 11/12/2011 9:59 PM, Dan Sherburn wrote: :--)>:--)> :--)>:--)> :--)>:--)> I'm building a Zenith CH750 that will be simple day VFR. I do know, however, :--)>:--)> I'll be using a fuel boost pump and I'm finding I'm not sure how to pick one :--)>:--)> out. What are folks typically using as fuel boost pumps? :--)>:--)> :--)>:--)> :--)>:--)> Hi Dan, :--)>:--)> I'm in a similar situation. I have a carb'ed high wing Glastar that is :--)>:--)> currently gravity feed only, and am considering switching the carb to a Rotec :--)>:--)> TBI unit :--)>:--)> (http://www.rotectbi.com/). They recommend a boost pump for takeoff, but I :--)>:--)> don't really know what to pick either. I see Facet pumps for as low as $30 :--)>:--)> and others over $600. :--)>:--)> :--)>:--)> I think we need to find a pump that allows free flow through it when turned :--)>:--)> off so to use gravity feed in cruise, but can be turned on for takeoff to :--)>:--)> provide the extra head pressure. Suggestions are welcome... :-) :--)>:--)> :--)>:--)> -Dj :--)> :--)>


    Message 9


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    Time: 02:00:26 PM PST US
    From: Charlie England <ceengland@bellsouth.net>
    Subject: Re: Fuel (boost) pump
    Now you have twice the pressure, & lose half that if one pump fails. If you're running 2 each 3 psi pumps, then the Rotex shouldn't care, I suppose. On 11/13/2011 3:34 PM, cdnch701 wrote: > --> AeroElectric-List message posted by: cdnch701<cdnch701@mts.net> > > Not in parallel... series only! > > :--)> --> AeroElectric-List message posted by: Charlie England<ceengland@bellsouth.net> > :--)> > :--)> If I understand the 'no check valve' spec correctly, if 2 are plumbed in parallel > :--)> you'll be either pumping into the opposite tank (t tanks), or circulating fuel back > :--)> through the other pump (single tank) when only one is running. ( Unless you're > :--)> using external check valves.) > :--)> > :--)> On 11/13/2011 11:58 AM, cdnch701 wrote: > :--)>:--)> --> AeroElectric-List message posted by: cdnch701<cdnch701@mts.net> > :--)>:--)> > :--)>:--)> Hey Dj... > :--)>:--)> > :--)>:--)> I'm also going with the Rotex TBI-34! With the remote pressure regulator > :--)>:--)> (they recommend a 0.5 - 6.0psi) I will be using two(20) - Facet #40108 > :--)>:--)> inline(no check valves - 4.5- 6.0psi) even though my aircraft is a high wing > :--)>:--)> 701! Van's Aircraft have them for $42 > :--)>:--)> http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1321206508-6- > :--)>:--)> 732&browse=engine s&product=pump-carb... > :--)>:--)> > :--)>:--)> Very simple wiring to set up! > :--)>:--)> Ron > :--)>:--)> > :--)>:--)> > :--)>:--)> On 11/12/2011 9:59 PM, Dan Sherburn wrote: > :--)>:--)> > :--)>:--)> > :--)>:--)> I'm building a Zenith CH750 that will be simple day VFR. I do know, however, > :--)>:--)> I'll be using a fuel boost pump and I'm finding I'm not sure how to pick one > :--)>:--)> out. What are folks typically using as fuel boost pumps? > :--)>:--)> > :--)>:--)> > :--)>:--)> Hi Dan, > :--)>:--)> I'm in a similar situation. I have a carb'ed high wing Glastar that is > :--)>:--)> currently gravity feed only, and am considering switching the carb to a Rotec > :--)>:--)> TBI unit > :--)>:--)> (http://www.rotectbi.com/). They recommend a boost pump for takeoff, but I > :--)>:--)> don't really know what to pick either. I see Facet pumps for as low as $30 > :--)>:--)> and others over $600. > :--)>:--)> > :--)>:--)> I think we need to find a pump that allows free flow through it when turned > :--)>:--)> off so to use gravity feed in cruise, but can be turned on for takeoff to > :--)>:--)> provide the extra head pressure. Suggestions are welcome... :-) > :--)>:--)> > :--)>:--)> -Dj > :--)> > :--)> > >


    Message 10


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    Time: 03:22:32 PM PST US
    From: "Dan Sherburn" <dsherburn@att.net>
    Subject: Re: Fuel (boost) pump
    All: Thanks for the replies. I do have a question into Zenith, and as Bob mentions they do indicate a test by where you measure fuel flow at elevated (simulated climb) angles. They also have pictures posted on the builders site that shows an O-200 installation that does show one of the Facet pumps mounted on the firewall. I'll ask them. I apologize in advance for turning the thread into a fuel delivery question....I really meant it to be an electrical load calculation question! Thanks again, Dan ----- Original Message ----- From: Robert L. Nuckolls, III To: aeroelectric-list@matronics.com Sent: Sunday, November 13, 2011 9:56 AM Subject: Re: AeroElectric-List: Fuel (boost) pump At 07:32 AM 11/13/2011, you wrote: https://www.pegasusautoracing.com/productdetails.asp?RecID=8440 Google 'facet fuel pump'. Above is a typical cube type pump made by Facet for small/medium hp carb'd engines. According to the Pegasus link, it draws about 1 amp at 12 volts. Ask a local A&P about O-200's on certified high wing planes; I'll bet almost none actually have fuel pumps. I know that the Luscombe 8A I learned to fly in didn't have one on its 65hp version (no electrical system). The real test would be, what does Zenith say? This is an IMPORTANT question. Gravity feed fuel systems are quite common in aviation . . . in airplanes with high wing tanks (a la the 8A) or fuselage tanks behind the firewall line the J-3. These systems get qualified by positioning the airplane at some deck angle at or above that which the airplane can sustain flight and the measuring the gravity fuel flow rates on the as-installed plumbing to make sure the engine is never starved for fuel. Unlike pumped systems, gravity fed systems may have only a few inches of head-pressure of the fuel itself (which is 3/4 as dense as water). ADDING anything in the line through which fuel must flow is a potential restriction. The Facet pumps have double check valves with un-seating pressures that MIGHT not be a problem but if the airplane's design does not call for a pump, I'd be very cautious about adding it . . . or making any other "neat" changes to the fuel delivery system. Bob . . .


    Message 11


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    Time: 03:22:32 PM PST US
    From: cdnch701 <cdnch701@mts.net>
    Subject: Re: Fuel (boost) pump
    No... one is the primary pump and the other is the secondary(backup) pump on my battery bus! :--)> :--)> Now you have twice the pressure, & lose half that if one pump fails. If you're :--)> running 2 each 3 psi pumps, then the Rotex shouldn't care, I suppose. :--)> :--)> On 11/13/2011 3:34 PM, cdnch701 wrote: :--)>:--)> :--)>:--)> Not in parallel... series only! :--)>:--)> :--)>:--)> England<ceengland@bellsouth.net> :--)>:--)> :--)>:--)> If I understand the 'no check valve' spec correctly, if 2 are plumbed in :--)>:--)> parallel you'll be either pumping into the opposite tank (t tanks), or :--)>:--)> circulating fuel back through the other pump (single tank) when only one is :--)>:--)> running. ( Unless you're using external check valves.) :--)>:--)> :--)>:--)> On 11/13/2011 11:58 AM, cdnch701 wrote: :--)>:--)> :--)>:--)> Hey Dj... :--)>:--)> :--)>:--)> I'm also going with the Rotex TBI-34! With the remote pressure regulator :--)>:--)> (they recommend a 0.5 - 6.0psi) I will be using two(20) - Facet #40108 :--)>:--)> inline(no check valves - 4.5- 6.0psi) even though my aircraft is a high wing :--)>:--)> 701! Van's Aircraft have them for $42 :--)>:--)> http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1321206508-6- :--)>:--)> 732&browse=engine s&product=pump-carb... :--)>:--)> :--)>:--)> Very simple wiring to set up! :--)>:--)> Ron :--)>:--)> :--)>:--)> :--)>:--)> On 11/12/2011 9:59 PM, Dan Sherburn wrote: :--)>:--)> :--)>:--)> :--)>:--)> I'm building a Zenith CH750 that will be simple day VFR. I do know, however, :--)>:--)> I'll be using a fuel boost pump and I'm finding I'm not sure how to pick one :--)>:--)> out. What are folks typically using as fuel boost pumps? :--)>:--)> :--)>:--)> :--)>:--)> Hi Dan, :--)>:--)> I'm in a similar situation. I have a carb'ed high wing Glastar that is :--)>:--)> currently gravity feed only, and am considering switching the carb to a Rotec :--)>:--)> TBI unit :--)>:--)> (http://www.rotectbi.com/). They recommend a boost pump for takeoff, but I :--)>:--)> don't really know what to pick either. I see Facet pumps for as low as $30 :--)>:--)> and others over $600. :--)>:--)> :--)>:--)> I think we need to find a pump that allows free flow through it when turned :--)>:--)> off so to use gravity feed in cruise, but can be turned on for takeoff to :--)>:--)> provide the extra head pressure. Suggestions are welcome... :-) :--)>:--)> :--)>:--)> -Dj :--)>:--)> :--)>




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