---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Tue 03/15/11: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:06 AM - Re: Re: Intake Hose (Lynn Matteson) 2. 06:29 AM - Re: Intake Hose (MHerder) 3. 07:46 AM - Re: Re: Intake Hose (JOSEPH MATHIAS LINDA MATHIAS) 4. 04:27 PM - Jabiru (BobbyPaulk@comcast.net) 5. 05:15 PM - Re: Jabiru (Martin Hone) 6. 05:59 PM - Information needed (Lynn Matteson) 7. 07:36 PM - Re: Jabiru (Keith Pickford) 8. 07:47 PM - Re: Radiator Hose for Intake and 1,3,5 lean (DaveG601XL) ________________________________ Message 1 _____________________________________ Time: 06:06:26 AM PST US From: Lynn Matteson Subject: Re: JabiruEngine-List: Re: Intake Hose Fine pitch? 47"? I had a 62 X 46 on my 2200, and I couldn't get 3300 unless I was going downhill. At WOT the needle is pulled up as far as it will go...supposedly....and this should richen things up quite a bit, and should give you something in the 1200's for EGT. Then when you reduce throttle to cruise speed, the needle plugs part of the needle jet, and things warm up a bit. If you've got 1400 at WOT, something is wrong. What plane is this on again? It helps if you add some pertinent data into your signature...then questions like I just asked is always available. 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 35mm) Status: flying...1088 hrs (since 3-27-2006) On Mar 14, 2011, at 12:43 PM, MHerder wrote: > > > Tilting the bowl helped things run smoother. Haven't installed > vane yet but will do so very soon and report back. > > #5 is still the pesky warm cylinder. Just above 1400 at MWOT. The > rest are running a little cooler now. I went back to hte .255 > which helped a bit too. > > This really is a moving target. Any little change has a trickle > effect on other things. > > I just think that I should be able to get 3300 rpm on such a fine > pitch prop (64x47) > > -------- > One Rivet at a Time! > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=333871#333871 > > ________________________________ Message 2 _____________________________________ Time: 06:29:43 AM PST US Subject: JabiruEngine-List: Re: Intake Hose From: "MHerder" I should clarify. THis is on a Jab 3300, it is a 64x47. It is on a Zodiac HD (draggier) not an XL. Most XL drivers seem to be using a 64x51. I wanted climb. I agree something is wrong... THat something is the distribution of fuel to the cylinders. 1425 is the worst I've seen that #5 at. Mind you, at the same time, my cyl 6 is running at 1080-1100!. Tilting the carb has helped and now. The mathematical average of the cylinders at MWOT is about 1225-1275, so my main jetting appears to be about right. Ive tried the .255 and .250 It seems that in an Ideal world I might need something in the middle. If I get really ambitious one day and when I really get things tuned in I might open up my .250 just a tiny tiny bit with a very precise reamer, but I'm not that close yet in the tuning stages. I'll look into adding some clarifications on my signature. Good point. Lynn Matteson wrote: > Fine pitch? 47"? I had a 62 X 46 on my 2200, and I couldn't get 3300 > unless I was going downhill. > > At WOT the needle is pulled up as far as it will > go...supposedly....and this should richen things up quite a bit, and > should give you something in the 1200's for EGT. Then when you reduce > throttle to cruise speed, the needle plugs part of the needle jet, > and things warm up a bit. If you've got 1400 at WOT, something is wrong. > > What plane is this on again? It helps if you add some pertinent data > into your signature...then questions like I just asked is always > available. > > 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 35mm) > Status: flying...1088 hrs (since 3-27-2006) > > > > On Mar 14, 2011, at 12:43 PM, MHerder wrote: > > > > > > > > > > Tilting the bowl helped things run smoother. Haven't installed > > vane yet but will do so very soon and report back. > > > > #5 is still the pesky warm cylinder. Just above 1400 at MWOT. The > > rest are running a little cooler now. I went back to hte .255 > > which helped a bit too. > > > > This really is a moving target. Any little change has a trickle > > effect on other things. > > > > I just think that I should be able to get 3300 rpm on such a fine > > pitch prop (64x47) > > > > -------- > > One Rivet at a Time! > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=333871#333871 > > > > > > > > > > > > > > > > > > > > > > > > > -------- One Rivet at a Time! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=333952#333952 ________________________________ Message 3 _____________________________________ Time: 07:46:26 AM PST US From: "JOSEPH MATHIAS LINDA MATHIAS" Subject: Re: JabiruEngine-List: Re: Intake Hose Mike, I have had similar numbers on my 3300 in a Lightning; the splitter vane installed in the exit from the airbox cover made the greatest improvement. Changing jets had no impact. Linda Mathias ----- Original Message ----- From: "MHerder" Sent: Tuesday, March 15, 2011 9:27 AM Subject: JabiruEngine-List: Re: Intake Hose > > > I should clarify. THis is on a Jab 3300, it is a 64x47. It is on a > Zodiac HD (draggier) not an XL. Most XL drivers seem to be using a 64x51. > I wanted climb. > > I agree something is wrong... THat something is the distribution of fuel > to the cylinders. 1425 is the worst I've seen that #5 at. Mind you, at > the same time, my cyl 6 is running at 1080-1100!. Tilting the carb has > helped and now. > > The mathematical average of the cylinders at MWOT is about 1225-1275, so > my main jetting appears to be about right. Ive tried the .255 and .250 It > seems that in an Ideal world I might need something in the middle. If I > get really ambitious one day and when I really get things tuned in I might > open up my .250 just a tiny tiny bit with a very precise reamer, but I'm > not that close yet in the tuning stages. > > I'll look into adding some clarifications on my signature. Good point. > > > Lynn Matteson wrote: >> Fine pitch? 47"? I had a 62 X 46 on my 2200, and I couldn't get 3300 >> unless I was going downhill. >> >> At WOT the needle is pulled up as far as it will >> go...supposedly....and this should richen things up quite a bit, and >> should give you something in the 1200's for EGT. Then when you reduce >> throttle to cruise speed, the needle plugs part of the needle jet, >> and things warm up a bit. If you've got 1400 at WOT, something is wrong. >> >> What plane is this on again? It helps if you add some pertinent data >> into your signature...then questions like I just asked is always >> available. >> >> 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 35mm) >> Status: flying...1088 hrs (since 3-27-2006) >> >> >> >> On Mar 14, 2011, at 12:43 PM, MHerder wrote: >> >> >> > >> > >> > >> > Tilting the bowl helped things run smoother. Haven't installed >> > vane yet but will do so very soon and report back. >> > >> > #5 is still the pesky warm cylinder. Just above 1400 at MWOT. The >> > rest are running a little cooler now. I went back to hte .255 >> > which helped a bit too. >> > >> > This really is a moving target. Any little change has a trickle >> > effect on other things. >> > >> > I just think that I should be able to get 3300 rpm on such a fine >> > pitch prop (64x47) >> > >> > -------- >> > One Rivet at a Time! >> > >> > >> > >> > >> > Read this topic online here: >> > >> > http://forums.matronics.com/viewtopic.php?p=333871#333871 >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > > > -------- > One Rivet at a Time! > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=333952#333952 > > > ________________________________ Message 4 _____________________________________ Time: 04:27:23 PM PST US From: BobbyPaulk@comcast.net Subject: JabiruEngine-List: Jabiru Martin, I checked the carb when I received it and found it came with a 250 in lieu of a 255 main jet. It would not turn up for the previous owner and I believe it was due to being too lean. I went up in size slowly watching EGT and CHT's. I ordered a 260 main jet from Pete and installed it. I also ordered a 290 needle jet and bored it to 295. I have changed jets so many times I don't even pull the carb off the engine any more. i think it is about as close to being right as I can get it. bobby 116 hrs. ________________________________ Message 5 _____________________________________ Time: 05:15:10 PM PST US Subject: Re: JabiruEngine-List: Jabiru From: Martin Hone Hi Bobby, There are a few more mods that can be made, but not necessary maybe in your application. These include drilling out the idle air bleed (which may entail upping the idle jet to #45) drilling out the main airbleed and the emulsion tube holes and even the jet in the float bowl that feeds the 'choke' circuit. Also placing a small washer under the clip on the needle will richen the mixture in cruise. But I really think that the problems are poor mixture distribution due to the manifold design, sometimes helped by angling the carb. Martin On Wed, Mar 16, 2011 at 9:24 AM, wrote: > Martin, > I checked the carb when I received it and found it came with a 250 in lieu > of a 255 main jet. It would not turn up for the previous owner and I believe > it was due to being too lean. I went up in size slowly watching EGT and > CHT's. I ordered a 260 main jet from Pete and installed it. I also ordered > a 290 needle jet and bored it to 295. > I have changed jets so many times I don't even pull the carb off the engine > any more. i think it is about as close to being right as I can get it. > > bobby > 116 hrs. > > * > > * > > ________________________________ Message 6 _____________________________________ Time: 05:59:33 PM PST US From: Lynn Matteson Subject: JabiruEngine-List: Information needed This is a general request to posters to please include some info about your engine, prop size, number of hours, aircraft type, etc., when you post, so that the people reading your post will have a better idea of what your situation is. This is most easily done by including this data in your signature lines. That way, every time you post someone who is trying to help will be able to see at a glance what you're dealing with...and if a computer dummy like me can make a signature, and change it when it becomes necessary, anyone can do it. 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 35mm) Status: flying...1088 hrs (since 3-27-2006) ________________________________ Message 7 _____________________________________ Time: 07:36:15 PM PST US From: Keith Pickford Subject: Re: JabiruEngine-List: Jabiru Have you checked the Needle & seat in the carb ? The early engines used the same as the 4 cyl but has since been upgraded to a larger size to allow more fuel flow. Regards Keith --- On Wed, 16/3/11, Martin Hone wrote: > From: Martin Hone > Subject: Re: JabiruEngine-List: Jabiru > To: jabiruengine-list@matronics.com > Date: Wednesday, 16, March, 2011, 1:11 PM > Hi Bobby, > There are a few more mods that can be made, but > not necessary maybe in your application.These > include drilling out the idle air bleed (which may entail > upping the idle jet to #45) drilling out the main airbleed > and the emulsion tube holes and even the jet in the float > bowl that feeds the 'choke' circuit. Also placing > a small washer under the clip on the needle will richen the > mixture in cruise. > > But I really think that the problems are poor > mixture distribution due to the manifold design, sometimes > helped by angling the carb. > Martin > > On Wed, Mar 16, 2011 > at 9:24 AM, > wrote: > > Martin, > I checked the carb when I received it and found it came > with a 250 in lieu of a 255 main jet. It would not turn up > for the previous owner and I believe it was due to being too > lean. I went up in size slowly watching EGT and CHT's. > I ordered a 260 main jet from Pete and installed it. I also > ordered a 290 needle jet and bored it to 295. > > I have changed jets so many times I don't even pull the > carb off the engine any more. i think it is about as close > to being right as I can get it. > > bobby > 116 hrs. > > > > ist" > target="_blank">http://www.matronics.com/Navigator?JabiruEngine-List > tp://forums.matronics.com > _blank">http://www.matronics.com/contribution > > > > > > > > ________________________________ Message 8 _____________________________________ Time: 07:47:28 PM PST US Subject: JabiruEngine-List: Re: Radiator Hose for Intake and 1,3,5 lean From: "DaveG601XL" The flow divider I put inside the Intakehoses.com rubber hose was the best improvement I found for getting left/right bank mixtures and temperatures closer together. This is an old picture showing an early divider. Instead of using .025 and folding the sides, I am now using a .050 piece of aluminum with beveled sides as to not cut into the hose. Been going strong for almost 170 hours and three years now. Good luck, -------- David Gallagher 601 XL/Jabiru 3300 First flight 7/24/08 Upgraded 3/19/10 160+ hours and climbing! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=334032#334032 Attachments: http://forums.matronics.com//files/flow_divider_168.jpg ------------------------------------------------------------------------------------- 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.