---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Sat 10/20/07: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:24 AM - Eliminate Fuel Pumps on High Wing?? (Don Morrisey) 2. 10:36 AM - Re: Eliminate Fuel Pumps on High Wing?? (steve) 3. 02:36 PM - Re: Eliminate Fuel Pumps on High Wing?? (Peter Harris) ________________________________ Message 1 _____________________________________ Time: 10:24:48 AM PST US From: Don Morrisey Subject: JabiruEngine-List: Eliminate Fuel Pumps on High Wing?? Hello, Myself and another BushCaddy builder will be installing our 3300's very soo n on our high wing taildraggers. I am curious how many high wing airplanes (or others) have been able to eliminate the engine driven fuel pump and th erefore the backup and run on gravity? This would be with the standard Bin g Carb. Thanks. Don...www.donsbushcaddy.comDon Morrisey's Skunkworks _________________________________________________________________ Windows Live Hotmail and Microsoft Office Outlook ' together at last. - Get it now. http://office.microsoft.com/en-us/outlook/HA102225181033.aspx?pid=CL10062 6971033 ________________________________ Message 2 _____________________________________ Time: 10:36:16 AM PST US From: "steve" Subject: Re: JabiruEngine-List: Eliminate Fuel Pumps on High Wing?? Don I had an Avid Flyer with the 2200A engine. I also had a forward facing fuel tank vent that gave the tank positive air pressure. The Avid factory ( now out of business ) stated that they tried flying without the fuel pump and just the air pressure worked ok. Thats what they said........ I installed an electric backup anyway but never needed it..... SW ----- Original Message ----- From: Don Morrisey To: jabiruengine-list@matronics.com Sent: Saturday, October 20, 2007 10:24 AM Subject: JabiruEngine-List: Eliminate Fuel Pumps on High Wing?? Hello, Myself and another BushCaddy builder will be installing our 3300's very soon on our high wing taildraggers. I am curious how many high wing airplanes (or others) have been able to eliminate the engine driven fuel pump and therefore the backup and run on gravity? This would be with the standard Bing Carb. Thanks. Don... www.donsbushcaddy.com Don Morrisey's Skunkworks ------------------------------------------------------------------------- ----- Windows Live Hotmail and Microsoft Office Outlook ' together at last. Get it now! ________________________________ Message 3 _____________________________________ Time: 02:36:20 PM PST US From: "Peter Harris" Subject: RE: JabiruEngine-List: Eliminate Fuel Pumps on High Wing?? Don, In the tests that I conducted with the 33000 I found that the carb as supplied is fitted with the float needle seat 2.25mm diam which is meant for gravity feed and at the anything above 2700rpm the seat leaks additional fuel into the bowl and makes the mixture excessively rich. The pump fed carb should be fitted with a smaller needle seat. If you run the carb as supplied with gravity feed alone it will run leaner that the others above 2700 but I found it still within EGT limits. Peter H _____ From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Don Morrisey Sent: Sunday, 21 October 2007 3:24 AM Subject: JabiruEngine-List: Eliminate Fuel Pumps on High Wing?? Hello, Myself and another BushCaddy builder will be installing our 3300's very soon on our high wing taildraggers. I am curious how many high wing airplanes (or others) have been able to eliminate the engine driven fuel pump and therefore the backup and run on gravity? This would be with the standard Bing Carb. Thanks. Don... www.donsbushcaddy.com Don Morrisey's Skunkworks _____ Windows Live Hotmail and Microsoft Office Outlook - together at last. 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