---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Thu 03/25/10: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:10 PM - Jaguar cowling pirep (Martin Ringvold) 2. 04:23 PM - Re: Jaguar cowling pirep (BILL9725@AOL.COM) ________________________________ Message 1 _____________________________________ Time: 03:10:41 PM PST US From: Martin Ringvold Subject: TeamGrumman-List: Jaguar cowling pirep Well, I took the leap and ordered the first production AuCountry Jaguar-c owling.-I've flown the plane about 10 hours since I received it from Gary about two weeks ago. - I use the-79 Tiger-primarily for 150-450 NM cross country trips from- Norcal to-the Bay Area and Los-Angles for work and pleasure. Besides- the urge for a fancy upgrade I've-always been bothered by the high EGT an d oil temperatures in climb and cruise on these frequent trips. I've got th e EDM-700-and I'm aware of the past discussions whether EDM indicates hig her temperatures than their EI engine monitor counterpart. Although I disli ke the "EDM-temps" creeping up well-beyond 400 CHTs under most circumst ances except cold weather-(mid 30s-40 here in CA)-Gary has always maint ained that I don't have a CHT heating issue. Still, with the powerflow alre ady in place (required for the STC) I went for the upgrade. - I don't have well documented before-data but I know my plane pretty well af ter ~350 hours flown, mostly XC. Under conditions seen in the last two week s with temperatures a bit over standard temperatures I would normally cruis e between 8-10K at 2600 leaned out with myself, full fuel-and 30 lbs of b ags. In the past (with standard temperature days)-I would see #3 creep up to ~425 in climb and hoover around/over 400 in cruise (worse in the summer time). Now, I see #1 as the hottest cylinder in climb-at ~410- but tak e into consideration that I've leaned more aggressively these past jaguar-h ours in-climb due to the better cooling.-At cruising altitude (10K)-2 600 RPM-#1 remains the hottest around 375 while the-2,3 and-4 stays i n the-high 360s. At full throttle at-10K leaned out (100-75 ROP) I did not see CHTs-over 400.-The oil temperature on my recent 3 hour-flight lied-flat-on 180 degrees. I've had problems keeping it below 200-in the past but I must admit I pay closer attention to the oil temperatures in the sum mer months so I can't cough up a good standard-day comparison for oil temps before we're in the summer days.- - I think its too early for me to cement the actual cooling improvement numbe rs but so far I'm very satisfied too see the EDM CHTs well below 400 and I' m looking forward to see the numbers once it gets into the 100s here in CA. - With the same-few recent data points, I've seen 143-144 TAS at 10K full t hrottle performance on these recent trips. In the past, with my removed ste ps, tail strobe mod, Lycon 400 SMOH engine-and 63 prop pitch-I've obser ved time and again that my plane came out to the original FT "tiger speed" at 138-139 TAS, all measured with the Garmin 430W TAS computer. - The oil check involves cowling pop-screws so the pre-flight takes a bit mor e time on the ground. Other than that, my wife things the "plane looks new" and she suggested a new paint job since the cowling came out with white pa int...I'll try to talk her out of it... - Martin N3752W=0A=0A=0A ________________________________ Message 2 _____________________________________ Time: 04:23:32 PM PST US From: BILL9725@AOL.COM Subject: Re: TeamGrumman-List: Jaguar cowling pirep Hi Martin Thanks so much for the report on Gary`s great creation. I have been in sic with you on the same issues on my 75 tiger, also located in Northern Calif. My number 4 cylinder will always hover around 425 on normal cruise 2600 same altitude. I am looking to do the same but do not already have the power flow already on. The fun part is to think it will be great because the engine is similar to yours but a Millie um motor with only 150 hours on it. Very strong though as it will easily climb to over 13,000 and more and I have yet to see a altitude where I did not have to pull back to keep it under 2700, same 63 inch prop. So I am looking to go with Gary`s mod and a 65 inch prop. What kind of fuel flows are you seeing? I have the EDM with fuel flows and am sure you mod also saves here too! I am going to the meet at Willow on Saturday and hope you can attend also so we can go over the mod in detail. Bill N1540R In a message dated 3/25/2010 3:11:27 P.M. Pacific Daylight Time, mringvold@YAHOO.COM writes: Well, I took the leap and ordered the first production AuCountry Jaguar cowling. I've flown the plane about 10 hours since I received it from Gary about two weeks ago. I use the 79 Tiger primarily for 150-450 NM cross country trips from Norcal to the Bay Area and Los Angles for work and pleasure. Besides the urge for a fancy upgrade I've always been bothered by the high EGT and oil temperatures in climb and cruise on these frequent trips. I've got the EDM-700 and I'm aware of the past discussions whether EDM indicates higher temperatures than their EI engine monitor counterpart. Although I dislike the "EDM temps" creeping up well beyond 400 CHTs under most circumstances except cold weather (mid 30s-40 here in CA) Gary has always maintained that I don't have a CHT heating issue. Still, with the powerflow already in place (required for the STC) I went for the upgrade. I don't have well documented before-data but I know my plane pretty well after ~350 hours flown, mostly XC. Under conditions seen in the last two weeks with temperatures a bit over standard temperatures I would normally cruise between 8-10K at 2600 leaned out with myself, full fuel and 30 lbs of bags. In the past (with standard temperature days) I would see #3 creep up to ~425 in climb and hoover around/over 400 in cruise (worse in the summer time). Now, I see #1 as the hottest cylinder in climb at ~410 but take into consideration that I've leaned more aggressively these past jaguar-hours in climb due to the better cooling. At cruising altitude (10K) 2600 RPM #1 remains the hottest around 375 while the 2,3 and 4 stays in the high 360s. At full throttle at 10K leaned out (100-75 ROP) I did not see CHTs over 400. The oil temperature on my recent 3 hour flight lied flat on 180 degrees. I've had problems keeping it below 200 in the past but I must admit I pay closer attention to the oil temperatures in the summer months so I can't cough up a good standard-day comparison for oil temps before we're in the summer days. I think its too early for me to cement the actual cooling improvement numbers but so far I'm very satisfied too see the EDM CHTs well below 400 and I'm looking forward to see the numbers once it gets into the 100s here in CA. With the same few recent data points, I've seen 143-144 TAS at 10K full throttle performance on these recent trips. In the past, with my removed steps, tail strobe mod, Lycon 400 SMOH engine and 63 prop pitch I've observed time and again that my plane came out to the original FT "tiger speed" at 138-139 TAS, all measured with the Garmin 430W TAS computer. The oil check involves cowling pop-screws so the pre-flight takes a bit more time on the ground. Other than that, my wife things the "plane looks new" and she suggested a new paint job since the cowling came out with white paint...I'll try to talk her out of it... Martin N3752W (http://www.matronics.com/Navigator?TeamGrumman-List) .com/contribution) ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-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/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-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.