---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Thu 09/26/13: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:59 AM - 601XL B 3300 carb / left - right bank temp differential (Rich) 2. 07:23 AM - Re: 601XL B 3300 carb / left - right bank temp differential (Mark Hubelbank) ________________________________ Message 1 _____________________________________ Time: 06:59:05 AM PST US Subject: JabiruEngine-List: 601XL B 3300 carb / left - right bank temp differential From: Rich <4rcsimmons@comcast.net> For the record I am building a 601XL (B) with the Jabiru 3300! Over the past years of building my plane and reading the Matronics list for the Jabiru 3300 Engine and the Zenith list there has been a lot of conversation on Left/Right Bank Temp differential due to the sharp bend of the intake hose joining the Air box to Carb. I have read on the forums simply twisting the Carb a bit in its couplings and this improves the condition. Others may also add veins in the intake tube to straighten out the airflow a bit. For a While, the Cobra tube was offered but that source has moved on to other things in life so they say. My thoughts are to rotate the tube on the Carb 90 degrees and then plumb my way back to the air box and also moving the coupling on the air box. So with my above statements, what is the better way to attack this problem before my targeted first flight next spring since I am still in the wiring and final installation mode? I know this will draw many opinions but I consider learning from what others did and listening to wise old owls is probably a good thing! Thanks for sharing your opinion and what you did yourself. Regards, Rich Simmons Murfreesboro, TN - Rich ________________________________ Message 2 _____________________________________ Time: 07:23:56 AM PST US From: Mark Hubelbank Subject: Re: JabiruEngine-List: 601XL B 3300 carb / left - right bank temp differential Rich, I has a similar configuration when I had a Jabiru, finally switched to the Rotac carb but I think one observation may still be significant. I found that having the airflow come from the top instead of from one side significantly helped with the Rotec and I expect it would with the Bing. I believe this was because the airflow even with straighteners or a "Cobra" is still unsymmetrical and with airflow from the top it is more symmetric - at least from side to side. Unfourtunately, the airbox as supplied by Jabiru does not make such air routing easy, it would need to be modified. Something to consider. You can see www.n708hu.com 1066 and 1069. More hose than I would have liked but it did work. On 09/26/2013 9:58 AM, Rich wrote: > > For the record I am building a 601XL (B) with the Jabiru 3300! > Over the past years of building my plane and reading the Matronics list for the Jabiru 3300 Engine and the Zenith list there has been a lot of conversation on Left/Right Bank Temp differential due to the sharp bend of the intake hose joining the Air box to Carb. I have read on the forums simply twisting the Carb a bit in its couplings and this improves the condition. Others may also add veins in the intake tube to straighten out the airflow a bit. For a While, the Cobra tube was offered but that source has moved on to other things in life so they say. > > My thoughts are to rotate the tube on the Carb 90 degrees and then plumb my way back to the air box and also moving the coupling on the air box. > > So with my above statements, what is the better way to attack this problem before my targeted first flight next spring since I am still in the wiring and final installation mode? > > I know this will draw many opinions but I consider learning from what others did and listening to wise old owls is probably a good thing! > > Thanks for sharing your opinion and what you did yourself. > > Regards, > Rich Simmons > Murfreesboro, TN > > - Rich > > -- Mark Hubelbank NorthEast Monitoring 2 Clock Tower Place Suite 555 Maynard, MA, 01754 - USA mhubel@nemon.com 978-443-3955 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-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/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-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.