---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Thu 08/04/11: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:13 AM - Orange Fox photo album (James, Clive R) 2. 01:37 AM - Re: Orange Fox photo album (James, Clive R) 3. 11:03 AM - Re: Re: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) (Lynn Matteson) 4. 12:03 PM - Re: Re: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) (Don Honabach) ________________________________ Message 1 _____________________________________ Time: 01:13:51 AM PST US Subject: JabiruEngine-List: Orange Fox photo album From: "James, Clive R" http://groups.yahoo.com/group/jabiruengines/photos/album/1689294132/pic/ list -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Don Honabach Sent: 04 August 2011 00:08 Subject: RE: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) --> Lynn, Sorry, one more question. Do you have a picture of the 'ramcharger' intake manifold? Thanks! Don -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Lynn Matteson Sent: Wednesday, August 03, 2011 3:42 PM Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) --> Don- I didn't start out wanting to make mods to the engine, but the rocker arm bushings wore out, so I replaced them with something that I thought was a better bearing for the purpose. When the crank gear broke, that opened the door for the ignition modification. I hadn't liked the pseudo-magneto that Jabiru came up with, and when I had oil leaks from both distributor shafts early on, and rotors that got wobbly (my fault for not gluing them on....what? how many engines require you to glue a rotor in place?), that set the stage for changing to a modern ignition system....capable of advancing the timing when necessary. I bought the Rotec TBI because I had been reading a lot about flying "lean of peak EGT", and I wanted to give that theory a try. Because you can't do this with a Bing....that is, change the mixture on the fly...when I heard about the TBI that Rotec was building, I bought one. If you are using it on a 2200, plan on restricting the throttle travel, as the size of the throat...40 mm, if that's the one you bought...is to much for the 2200 engine. For a 3300, I understand that the size is just right. I restricted mine about 1/4", then later I thought that sleeving the throat down to 35 or 36 mm made more sense. (I see that Rotec is now making a 34 mm TBI for VW engines.) Also, once you begin to fly it, you will probably notice that the mixture control can be adjusted to provide a lesser-than-full travel...also necessary for the smaller engine. I think that the latest intake manifold that I built improves the power of the engine, and gets the EGT's a bit closer....but still not perfect as I had hoped. But like they say, if the CHT's are close and low, (and mine are always less than 20 F apart, and often down to single digits) then the EGT spread is not that big a deal. As long as your engine is running well, and you follow the hourly checks that Jab provides, and have *good luck*, none of those mods that I did was vital. I just saw room for improvement and I love to tinker, so I did what I felt had to be done. Lynn Matteson Kitfox IV Speedster, taildragger Jabiru 2200, #2062 Prince prop 64 x 30, P-tip Electroair direct-fire ignition system Rotec TBI-40 injection (sleeved to 36mm) Status: flying with "Ramcharger" intake manifold...1152 hrs (since 3-27-2006) do not archive On Aug 3, 2011, at 12:59 PM, Don Honabach wrote: > > > Lynn, > > I just noticed that you've done a ton of mods -- very cool! I think > there should be a new model "Lynn's Jabiru Extreme Edition" > for your setup ! > > One of the things I noticed was that you have the Rotec TBI for your > engine. I just ordered mine the other day. If you don't mind, any > tips for a newb? > > Also, what was the main reason for going over to the Alectroair > Ignition System? > > Looking back, if you had to do all the mods over again for the Jabiru > Engine (intake manifold, ignition, carb, etc.), would you? > Are there any that you consider vital? > > Thanks, > Don > ________________________________ Message 2 _____________________________________ Time: 01:37:30 AM PST US Subject: RE: JabiruEngine-List: Orange Fox photo album From: "James, Clive R" http://groups.yahoo.com/group/jabiruengines/photos/album/1689294132/pic/ list If it breaks up post the whole thing including 'list' -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Don Honabach Sent: 04 August 2011 00:08 Subject: RE: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) --> Lynn, Sorry, one more question. Do you have a picture of the 'ramcharger' intake manifold? Thanks! Don -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Lynn Matteson Sent: Wednesday, August 03, 2011 3:42 PM Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) --> Don- I didn't start out wanting to make mods to the engine, but the rocker arm bushings wore out, so I replaced them with something that I thought was a better bearing for the purpose. When the crank gear broke, that opened the door for the ignition modification. I hadn't liked the pseudo-magneto that Jabiru came up with, and when I had oil leaks from both distributor shafts early on, and rotors that got wobbly (my fault for not gluing them on....what? how many engines require you to glue a rotor in place?), that set the stage for changing to a modern ignition system....capable of advancing the timing when necessary. I bought the Rotec TBI because I had been reading a lot about flying "lean of peak EGT", and I wanted to give that theory a try. Because you can't do this with a Bing....that is, change the mixture on the fly...when I heard about the TBI that Rotec was building, I bought one. If you are using it on a 2200, plan on restricting the throttle travel, as the size of the throat...40 mm, if that's the one you bought...is to much for the 2200 engine. For a 3300, I understand that the size is just right. I restricted mine about 1/4", then later I thought that sleeving the throat down to 35 or 36 mm made more sense. (I see that Rotec is now making a 34 mm TBI for VW engines.) Also, once you begin to fly it, you will probably notice that the mixture control can be adjusted to provide a lesser-than-full travel...also necessary for the smaller engine. I think that the latest intake manifold that I built improves the power of the engine, and gets the EGT's a bit closer....but still not perfect as I had hoped. But like they say, if the CHT's are close and low, (and mine are always less than 20 F apart, and often down to single digits) then the EGT spread is not that big a deal. As long as your engine is running well, and you follow the hourly checks that Jab provides, and have *good luck*, none of those mods that I did was vital. I just saw room for improvement and I love to tinker, so I did what I felt had to be done. Lynn Matteson Kitfox IV Speedster, taildragger Jabiru 2200, #2062 Prince prop 64 x 30, P-tip Electroair direct-fire ignition system Rotec TBI-40 injection (sleeved to 36mm) Status: flying with "Ramcharger" intake manifold...1152 hrs (since 3-27-2006) do not archive On Aug 3, 2011, at 12:59 PM, Don Honabach wrote: > > > Lynn, > > I just noticed that you've done a ton of mods -- very cool! I think > there should be a new model "Lynn's Jabiru Extreme Edition" > for your setup ! > > One of the things I noticed was that you have the Rotec TBI for your > engine. I just ordered mine the other day. If you don't mind, any > tips for a newb? > > Also, what was the main reason for going over to the Alectroair > Ignition System? > > Looking back, if you had to do all the mods over again for the Jabiru > Engine (intake manifold, ignition, carb, etc.), would you? > Are there any that you consider vital? > > Thanks, > Don > ________________________________ Message 3 _____________________________________ Time: 11:03:27 AM PST US From: Lynn Matteson Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) Thanks, Don. I can't really say for sure as to fuel economy, as I didn't have absolute records of a before, and after the rebuild, comparison to make any definitive statement. I can only say it *seems* like fuel lasted longer after I installed the Electroair, but that is pure guesswork on my part. When I really noticed the fuel savings was when I installed the TBI...that's when I started to pay closer attention to fuel numbers and kept better records. But with the kind of flying I do, flight comparisons between today and yesterday and tomorrow are going to be pretty scattered, given wind direction, strength, etc. To answer the photos question, here are a few to view in case you can't get into the Yahoo album area: Lynn Matteson Kitfox IV Speedster, taildragger Jabiru 2200, #2062 Prince prop 64 x 30, P-tip Electroair direct-fire ignition system Rotec TBI-40 injection (sleeved to 36mm) Status: flying with "Ramcharger" intake manifold...1152 hrs (since 3-27-2006) On Aug 3, 2011, at 7:06 PM, Don Honabach wrote: > > > Thanks Lynn! > > Great, great, great info... > > Did you happen notice any better fuel economy with the new ignition > system? I thought I saw on their site a claim of 10 to 15% better > fuel economy which has raised my interest a bit in the unit. > > For what it's worth, while I appreciate the automatic nature of the > Bing Carb, I'm really looking forward to the finer control on the > Rotec TBI. > > Thanks! > Don ________________________________ Message 4 _____________________________________ Time: 12:03:58 PM PST US From: Don Honabach Subject: RE: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) THANKS Lynn! Don -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Lynn Matteson Sent: Thursday, August 04, 2011 10:50 AM Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) Thanks, Don. I can't really say for sure as to fuel economy, as I didn't have absolute records of a before, and after the rebuild, comparison to make any definitive statement. I can only say it *seems* like fuel lasted longer after I installed the Electroair, but that is pure guesswork on my part. When I really noticed the fuel savings was when I installed the TBI...that's when I started to pay closer attention to fuel numbers and kept better records. But with the kind of flying I do, flight comparisons between today and yesterday and tomorrow are going to be pretty scattered, given wind direction, strength, etc. To answer the photos question, here are a few to view in case you can't get into the Yahoo album area: ------------------------------------------------------------------------------------- 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.