---------------------------------------------------------- Jabiru-List Digest Archive --- Total Messages Posted Wed 01/09/13: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:23 AM - Re: Jabiru 3300 Ideal Oil Temp (FLYaDIVE) ________________________________ Message 1 _____________________________________ Time: 07:23:16 AM PST US Subject: Re: Jabiru-List: Jabiru 3300 Ideal Oil Temp From: FLYaDIVE Tally Ho Old Navy - This is Old Air Force: Yes, you are correct about the temps. They should be around 180 F (170 to 200 F). Those temps are for a reason: 1 - It is what the oil manufacture recommends. If you fly a multi-grade oil say 15 W 50 at lower temps you will never see the 50 weight. so you are not getting the proper viscosity for ring sealing nor the proper pressure rating (EP). 2 - When at the temp range of 170 to 200 F what you are burning off is the moisture. I would not call it contamination. It is, but just a bit misleading. When the moisture goes away so do the acid effects of the oil. So, in a way you are correct - - - It is a contamination. But, fits the question which came first, the chicken or the egg? I got the answer to that too. Blocking off the oil cooler is the first step in maintaining temps. Other tricks are: 1 - Reduce the IN FLOW air 2 - Reduce the OUT FLOW air 3 - Change the flow pattern under the cowl. Manufactures like Lycoming recommend a MAX CHT difference of 50 Degrees between all cylinders. I don't quit till I see only 20 degrees difference. I have installed two oil temp probes on a Lycoming engine. One at the rear of the engine on the accessory case and another at the front of the engine near the Prop Thrust Bearing. Where do you think I saw the highest temps? If you said at the Prop Thrust Bearing you are WRONG! Yea, I would have put my money there also. Point being - Where are you reading your oil temp? Check 6 Barry On Tue, Jan 8, 2013 at 4:16 PM, mdaniels wrote: > > Gentlemen, > > This is my first winter with a Jabiru J-230 (with a Jabiru 3300 engine); > and, I'd like your thoughts on the ideal Oil Temp, and the methods that you > use to increase the Oil Temp. > > My cruise (2800-2900 RPMs) Oil Temp was 140 F with an OAT of 30 F. > > Since I was under the impression that the Oil Temp should be at least 180 > F, to boil off the impurities; I covered the Oil Cooler Inlet to attempt to > raise the Oil Temp. > > With 1/3 of the Oil Cooler covered the Oil Temp increased to 152 F. > > Next, I covered 2/3s of the Oil Cooler and that increased the Oil Temp to > 163 F. > > Then, I covered All of the Oil Cooler and that increased the Oil Temp to > 174 F (it did get to 186 F in a 90 kt climb). > > Please help me with your thoughts on this issue. > > Thank you > OldNavy w/a Jab > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiru-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Jabiru-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/jabiru-list Browse Digests http://www.matronics.com/digest/jabiru-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.