---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Thu 02/20/14: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:30 AM - Re: Oil Cooler's... (Bill Judge) 2. 07:39 AM - Re: Oil Cooler's... (Carl Froehlich) 3. 07:41 AM - Re: Oil Cooler's... (Charles Kuss) 4. 08:04 AM - Re: Re: Oil Cooler's... (Larry Bowen) 5. 09:42 AM - Re: Oil Cooler's... (Bill Judge) 6. 10:57 AM - Re: Re: Oil Cooler's... (Marty Helller) 7. 11:02 AM - Re: Re: Oil Cooler's... (Marty Helller) 8. 07:57 PM - Re: Oil Cooler's... (RV6 Flyer) ________________________________ Message 1 _____________________________________ Time: 07:30:29 AM PST US From: Bill Judge Subject: RV-List: Re: Oil Cooler's... I've been running a Setrab 10 row for around 750 hrs, no problems, temps often run too low and so its half covered with AL tape. It's about 1/3 the size of the standard Vans cooler. They are made of aluminum rather than brass and AL just works better for a heat exchanger. You can get aircraft fittings on them too, they even have swivel fittings at 90 and 45 degrees available. Bill N84WJ, RV-8, 980 hrs rv-8.blogspot.com > > > Time: 05:38:47 PM PST US > From: Matt Dralle > Subject: RV-List: Oil Cooler's... > > > Greetings RV'ers, > > On the RV-8, I've got Stewart/Warner 10610R 10 row oil cooler for the > IO-390. > It's mounted on the rear baffle and its worked well and kept the oil temps > in > the low 180's under all conditions. > > I noticed today, that the outside mounting flange that goes next to the > baffle > is cracked. I suppose I could get it welded or brazed or whatever they do > to > aluminium, but that seems like a hack. > > Apparently, Chief doesn't carry the Stewart/Warner brand anymore and has > to different > variants of the Aero Classic brand in the 10 Row 10610R compatible unit. > > One is the "Standard" model for $269: > > > http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/standard/aec-8000081.html > > The other is the "HE" (High Efficiency) models are $575: > > > http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/he-series/aec-8001646.html > > Any thought's on either of these two options? Pros and cons. The HE > models look > a lot like the S&W model I have, assuming the pictures are accurate. > > Thanks for the feedback. > > Matt > > > - > Matt Dralle > > RV-8 #82880 N998RV "Ruby Vixen" > http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log > http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log > http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel > Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... > > RV-6 #20916 N360EM "The Flyer" > http://www.mattsrv6.com - Matt's RV-6 Revitalization Log > Status: 200+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer > Mode > > Matt's Livermore Airport Live ATC Stream! > Check out the live ATC stream directly from my hangar at the Livermore > Airport. Includes both Tower and Ground transmissions. Archives too! > For entertainment purposes only. http://klvk.matronics.com > > ________________________________ Message 2 _____________________________________ Time: 07:39:47 AM PST US From: "Carl Froehlich" Subject: RE: RV-List: Oil Cooler's... Matt, A few thoughts: - Mounting the cooler on the firewall solves the "heavy vibrating object mounted with a large moment arm" problem. Attached photo is how I did it on the RV-10 (not shown is the forward cooler support attached to the engine mount). On the RV-8A I mounted the cooler on the right side of the firewall with the 3" hose connecting on the right side of the plenum. I believe most 8s are on the right side as there is more room. - Mounting the cooler on the firewall allows for an easy "oil cooler air butterfly valve" install in the 3" hose between the cooler and firewall. Here is one place to get this butter fly valve: http://www.nonstopaviation.com/controller-cooler-p-14592.html?osCsid=bc77b7d 1ef861c7cd83d92c5a28010dc - Consider using the AirFlow oil cooler if you end up buying a replacement. I have this on my RV-10 and have never had a oil temp issue. Here is one place to get this cooler: http://www.aircraftspruce.com/catalog/eppages/xseriesOilCooler.php Carl -----Original Message----- From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Matt Dralle Sent: Wednesday, February 19, 2014 9:50 PM Subject: Re: RV-List: Oil Cooler's... I thought the source of the cracking had been addressed. I had some issues with the left-rear baffle flange cracking too in the beginning. I made the rear baffle nice and strong, but used the stock left-rear piece which was .032. It just wasn't up for the task. I later added a cross strut from the crankcase just ahead of the hoist loop all the way back to the left rear corner and added some .063 angle stiffners over the oil cooler flanges for additional support. I'm wondering if I cracked the flange today taking the oil cooler off. It was pretty stuck on and I was having to do a fair amount of prying to get it to separate from the gasket. I would have been more careful if I'd of realized those flanges are made out of such crappy pot metal. Man, they are soft. Since I'm rebuilding, I decided to rebuild the left-rear baffle part and was taking the oil cooler off today to accommodate that. That's when I noticed the crack. Attached are some pictures of the setup prior to disassembly today. Matt At 06:10 PM 2/19/2014 Wednesday, Kelly McMullen wrote: > >I certainly recommend talking to Pacific Oil Cooler before you make any decisions. They can give you pricing to repair, and probably have a source for exact replacement as well. > >On 2/19/2014 6:57 PM, Linn Walters wrote: >>If you just install another oil cooler .... my gut feeling is that it'll crack too. If it was mine I would have it welded .... you can't braze aluminum .... and figure out why the oil cooler cracked in the first place. My first choice is engine vibration, and the second is stress due to the baffle mounting flange not being flat. >>Linn >> >>On 2/19/2014 8:35 PM, Matt Dralle wrote: >>>Greetings RV'ers, >>> >>>On the RV-8, I've got Stewart/Warner 10610R 10 row oil cooler for the IO-390. It's mounted on the rear baffle and its worked well and kept the oil temps in the low 180's under all conditions. >>> >>>I noticed today, that the outside mounting flange that goes next to the baffle is cracked. I suppose I could get it welded or brazed or whatever they do to aluminium, but that seems like a hack. >>> >>>Apparently, Chief doesn't carry the Stewart/Warner brand anymore and has to different variants of the Aero Classic brand in the 10 Row 10610R compatible unit. >>> >>>One is the "Standard" model for $269: >>> >>> >>> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers >>> /standard/aec-8000081.html >>> >>>The other is the "HE" (High Efficiency) models are $575: >>> >>> >>> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers >>> /he-series/aec-8001646.html >>> >>>Any thought's on either of these two options? Pros and cons. The HE models look a lot like the S&W model I have, assuming the pictures are accurate. >>> >>>Thanks for the feedback. >>> >>>Matt > - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 180+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode Matt's Livermore Airport Live ATC Stream! Check out the live ATC stream directly from my hangar at the Livermore Airport. Includes both Tower and Ground transmissions. Archives too! For entertainment purposes only. http://klvk.matronics.com ________________________________ Message 3 _____________________________________ Time: 07:41:15 AM PST US From: Charles Kuss Subject: Re: RV-List: Oil Cooler's... Matt, Nice job on those angle reinforcing plates. I would suggest examining the way the reinforcing plates lay against the oil cooler flanges. If the reinforcing plate presses on the radius of the oil cooler flange, it will introduce a stress into the radius. Your cure to your cracking problem may simply be to radius the reinforcing plate(s) so they don't press on the oil cooler's flange radius. Regarding the softness of the oil cooler flange, that is a good thing. Soft metals are more ductile than harder alloys. Harder is generally stronger, but also more brittle. Charlie -------------------------------------------- On Wed, 2/19/14, Matt Dralle wrote: Subject: Re: RV-List: Oil Cooler's... To: rv-list@matronics.com, rv8-list@matronics.com Date: Wednesday, February 19, 2014, 9:49 PM I thought the source of the cracking had been addressed. I had some issues with the left-rear baffle flange cracking too in the beginning. I made the rear baffle nice and strong, but used the stock left-rear piece which was .032. It just wasn't up for the task. I later added a cross strut from the crankcase just ahead of the hoist loop all the way back to the left rear corner and added some .063 angle stiffners over the oil cooler flanges for additional support. I'm wondering if I cracked the flange today taking the oil cooler off. It was pretty stuck on and I was having to do a fair amount of prying to get it to separate from the gasket. I would have been more careful if I'd of realized those flanges are made out of such crappy pot metal. Man, they are soft. Since I'm rebuilding, I decided to rebuild the left-rear baffle part and was taking the oil cooler off today to accommodate that. That's when I noticed the crack. Attached are some pictures of the setup prior to disassembly today. Matt At 06:10 PM 2/19/2014 Wednesday, Kelly McMullen wrote: > >I certainly recommend talking to Pacific Oil Cooler before you make any decisions. They can give you pricing to repair, and probably have a source for exact replacement as well. > >On 2/19/2014 6:57 PM, Linn Walters wrote: >>If you just install another oil cooler .... my gut feeling is that it'll crack too. If it was mine I would have it welded .... you can't braze aluminum .... and figure out why the oil cooler cracked in the first place. My first choice is engine vibration, and the second is stress due to the baffle mounting flange not being flat. >>Linn >> >>On 2/19/2014 8:35 PM, Matt Dralle wrote: >>>Greetings RV'ers, >>> >>>On the RV-8, I've got Stewart/Warner 10610R 10 row oil cooler for the IO-390. It's mounted on the rear baffle and its worked well and kept the oil temps in the low 180's under all conditions. >>> >>>I noticed today, that the outside mounting flange that goes next to the baffle is cracked. I suppose I could get it welded or brazed or whatever they do to aluminium, but that seems like a hack. >>> >>>Apparently, Chief doesn't carry the Stewart/Warner brand anymore and has to different variants of the Aero Classic brand in the 10 Row 10610R compatible unit. >>> >>>One is the "Standard" model for $269: >>> >>> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/standard/aec-8000081.html >>> >>>The other is the "HE" (High Efficiency) models are $575: >>> >>> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/he-series/aec-8001646.html >>> >>>Any thought's on either of these two options? Pros and cons. The HE models look a lot like the S&W model I have, assuming the pictures are accurate. >>> >>>Thanks for the feedback. >>> >>>Matt > - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 180+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode Matt's Livermore Airport Live ATC Stream! Check out the live ATC stream directly from my hangar at the Livermore Airport. Includes both Tower and Ground transmissions. Archives too! For entertainment purposes only. http://klvk.matronics.com ________________________________ Message 4 _____________________________________ Time: 08:04:43 AM PST US Subject: Re: RV-List: Re: Oil Cooler's... From: Larry Bowen Bill - How did you mount the setrab? Any pictures? -- Larry Bowen Larry@BowenAero.com http://BowenAero.com On Thu, Feb 20, 2014 at 10:29 AM, Bill Judge wrote: > I've been running a Setrab 10 row for around 750 hrs, no problems, temps > often run too low and so its half covered with AL tape. It's about 1/3 the > size of the standard Vans cooler. > > They are made of aluminum rather than brass and AL just works better for a > heat exchanger. > > You can get aircraft fittings on them too, they even have swivel fittings > at 90 and 45 degrees available. > > > Bill > > N84WJ, RV-8, 980 hrs > rv-8.blogspot.com > > >> >> >> Time: 05:38:47 PM PST US >> From: Matt Dralle >> Subject: RV-List: Oil Cooler's... >> >> >> Greetings RV'ers, >> >> On the RV-8, I've got Stewart/Warner 10610R 10 row oil cooler for the >> IO-390. >> It's mounted on the rear baffle and its worked well and kept the oil >> temps in >> the low 180's under all conditions. >> >> I noticed today, that the outside mounting flange that goes next to the >> baffle >> is cracked. I suppose I could get it welded or brazed or whatever they >> do to >> aluminium, but that seems like a hack. >> >> Apparently, Chief doesn't carry the Stewart/Warner brand anymore and has >> to different >> variants of the Aero Classic brand in the 10 Row 10610R compatible unit. >> >> One is the "Standard" model for $269: >> >> >> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/standard/aec-8000081.html >> >> The other is the "HE" (High Efficiency) models are $575: >> >> >> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/he-series/aec-8001646.html >> >> Any thought's on either of these two options? Pros and cons. The HE >> models look >> a lot like the S&W model I have, assuming the pictures are accurate. >> >> Thanks for the feedback. >> >> Matt >> >> >> - >> Matt Dralle >> >> RV-8 #82880 N998RV "Ruby Vixen" >> http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log >> http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log >> http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel >> Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... >> >> RV-6 #20916 N360EM "The Flyer" >> http://www.mattsrv6.com - Matt's RV-6 Revitalization Log >> Status: 200+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer >> Mode >> >> Matt's Livermore Airport Live ATC Stream! >> Check out the live ATC stream directly from my hangar at the Livermore >> Airport. Includes both Tower and Ground transmissions. Archives too! >> For entertainment purposes only. http://klvk.matronics.com >> >> * > > > * > > ________________________________ Message 5 _____________________________________ Time: 09:42:38 AM PST US From: Bill Judge Subject: RV-List: Re: Oil Cooler's... I just dug back through my emails to find the skinny on the Setrab cooler. I'm pretty sure it is this one: *http://www.hrpworld.com/store/default/100-series-std-10-row-oil-cooler-3-tall-m22-ports.html * It comes with straight on AN fittings but I couldn't get them to work in the space I had so I used these: http://www.hrpworld.com/store/default/an-10-x-m22-hose-fitting-90.html These fitting are mega expensive but swivel which takes alot of the stress off the attach points. I went this route for a few reasons: I had the stock cooler completely covered with AL tape and still couldn't get over 200 F temps.(Too much cooling) My baffles cracked from the weight of the stock cooler.(too much weight) I knew of a rv-6 built by 3 engineers(one is a DER) and they've flown 400 hrs trouble free with this cooler. I didn't do the firewall mount because i didn't want the hoses Even still when its cold I can't get over 160 F. Bill On Thu, Feb 20, 2014 at 7:29 AM, Bill Judge wrote: > I've been running a Setrab 10 row for around 750 hrs, no problems, temps > often run too low and so its half covered with AL tape. It's about 1/3 the > size of the standard Vans cooler. > > They are made of aluminum rather than brass and AL just works better for a > heat exchanger. > > You can get aircraft fittings on them too, they even have swivel fittings > at 90 and 45 degrees available. > > > Bill > > N84WJ, RV-8, 980 hrs > rv-8.blogspot.com > > >> >> >> Time: 05:38:47 PM PST US >> From: Matt Dralle >> Subject: RV-List: Oil Cooler's... >> >> >> Greetings RV'ers, >> >> On the RV-8, I've got Stewart/Warner 10610R 10 row oil cooler for the >> IO-390. >> It's mounted on the rear baffle and its worked well and kept the oil >> temps in >> the low 180's under all conditions. >> >> I noticed today, that the outside mounting flange that goes next to the >> baffle >> is cracked. I suppose I could get it welded or brazed or whatever they >> do to >> aluminium, but that seems like a hack. >> >> Apparently, Chief doesn't carry the Stewart/Warner brand anymore and has >> to different >> variants of the Aero Classic brand in the 10 Row 10610R compatible unit. >> >> One is the "Standard" model for $269: >> >> >> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/standard/aec-8000081.html >> >> The other is the "HE" (High Efficiency) models are $575: >> >> >> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/he-series/aec-8001646.html >> >> Any thought's on either of these two options? Pros and cons. The HE >> models look >> a lot like the S&W model I have, assuming the pictures are accurate. >> >> Thanks for the feedback. >> >> Matt >> >> >> - >> Matt Dralle >> >> RV-8 #82880 N998RV "Ruby Vixen" >> http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log >> http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log >> http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel >> Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... >> >> RV-6 #20916 N360EM "The Flyer" >> http://www.mattsrv6.com - Matt's RV-6 Revitalization Log >> Status: 200+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer >> Mode >> >> Matt's Livermore Airport Live ATC Stream! >> Check out the live ATC stream directly from my hangar at the Livermore >> Airport. Includes both Tower and Ground transmissions. Archives too! >> For entertainment purposes only. http://klvk.matronics.com >> >> ________________________________ Message 6 _____________________________________ Time: 10:57:22 AM PST US From: Marty Helller Subject: RE: RV-List: Re: Oil Cooler's... I have one with ~ 4 hours on it. Will sell for an hours worth of fuel plus shipping. Had unrelated cooling issues on first few flights=2C but ever yone pointed to the non- standard configuration (on firewall) so I changed to SW clone on baffling and still hard other problems to resolve.... Now l ife is cool at 175 oil temp and < 330 CHT. Contact off line at 703-732-3264 Marty RV-7=2C 150 hrs=2C KSUT From: bjudge@gmail.com Subject: RV-List: Re: Oil Cooler's... I just dug back through my emails to find the skinny on the Setrab cooler. I'm pretty sure it is this one: http://www.hrpworld.com/store/default/100-series-std-10-row-oil-cooler-3-ta ll-m22-ports.html It comes with straight on AN fittings but I couldn't get them to work in the space I had so I used these:http://www.hrpworld.com/store/default/an -10-x-m22-hose-fitting-90.html These fitting are mega expensive but swivel which takes alot of the stress off the attach points. I went this route for a few reasons: I had the stock cooler completely covered with AL tape and stillcouldn't ge t over 200 F temps.(Too much cooling) My baffles cracked from the weight of the stock cooler.(too much weight)I k new of a rv-6 built by 3 engineers(one is a DER) and they've flown 400 hrs trouble free with this cooler.I didn't do the firewall mount becaus e i didn't want the hoses Even still when its cold I can't get over 160 F. Bill On Thu=2C Feb 20=2C 2014 at 7:29 AM=2C Bill Judge wrote: I've been running a Setrab 10 row for around 750 hrs=2C no problems=2C temp s often run too low and so its half covered with AL tape. It's about 1/3 th e size of the standard Vans cooler. They are made of aluminum rather than brass and AL just works better for a heat exchanger. You can get aircraft fittings on them too=2C they even have swivel fittings at 90 and 45 degrees available. Bill N84WJ=2C RV-8=2C 980 hrs rv-8.blogspot.com Time: 05:38:47 PM PST US From: Matt Dralle Subject: RV-List: Oil Cooler's... Greetings RV'ers=2C On the RV-8=2C I've got Stewart/Warner 10610R 10 row oil cooler for the IO- 390. It's mounted on the rear baffle and its worked well and kept the oil temps in the low 180's under all conditions. I noticed today=2C that the outside mounting flange that goes next to the b affle is cracked. I suppose I could get it welded or brazed or whatever they do to aluminium=2C but that seems like a hack. Apparently=2C Chief doesn't carry the Stewart/Warner brand anymore and has to different variants of the Aero Classic brand in the 10 Row 10610R compatible unit. One is the "Standard" model for $269: http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-cooler s/standard/aec-8000081.html The other is the "HE" (High Efficiency) models are $575: http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-cooler s/he-series/aec-8001646.html Any thought's on either of these two options? Pros and cons. The HE model s look a lot like the S&W model I have=2C assuming the pictures are accurate. Thanks for the feedback. Matt - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 200+ Hours Since Purchase - Upgrades Complete=3B Now In Full Flyer Mode Matt's Livermore Airport Live ATC Stream! Check out the live ATC stream directly from my hangar at the Livermore Airport. Includes both Tower and Ground transmissions. Archives too! For entertainment purposes only. http://klvk.matronics.com ________________________________ Message 7 _____________________________________ Time: 11:02:37 AM PST US From: Marty Helller Subject: RE: RV-List: Re: Oil Cooler's... Also had this configuration....I'll send you photos when home=2C next week. In short=2C mounted 2 parallel pieces of angle aluminum on firewall=2C a nd mounted Setrab to that. Then built a fiberglass 'vulcano' to funnel the air. Had a butterfly valve at the attachment to the baffling.... Marty RV-7=2C KSUT 150 hrs ( P.s. Hi Bill..... Still owe you a ride....) Subject: Re: RV-List: Re: Oil Cooler's... From: larry@bowenaero.com Bill - How did you mount the setrab? Any pictures?-- Larry Bowen Larry@BowenAero.com http://BowenAero.com On Thu=2C Feb 20=2C 2014 at 10:29 AM=2C Bill Judge wrote : I've been running a Setrab 10 row for around 750 hrs=2C no problems=2C temp s often run too low and so its half covered with AL tape. It's about 1/3 th e size of the standard Vans cooler. They are made of aluminum rather than brass and AL just works better for a heat exchanger. You can get aircraft fittings on them too=2C they even have swivel fittings at 90 and 45 degrees available. Bill N84WJ=2C RV-8=2C 980 hrs rv-8.blogspot.com Time: 05:38:47 PM PST US From: Matt Dralle Subject: RV-List: Oil Cooler's... Greetings RV'ers=2C On the RV-8=2C I've got Stewart/Warner 10610R 10 row oil cooler for the IO- 390. It's mounted on the rear baffle and its worked well and kept the oil temps in the low 180's under all conditions. I noticed today=2C that the outside mounting flange that goes next to the b affle is cracked. I suppose I could get it welded or brazed or whatever they do to aluminium=2C but that seems like a hack. Apparently=2C Chief doesn't carry the Stewart/Warner brand anymore and has to different variants of the Aero Classic brand in the 10 Row 10610R compatible unit. One is the "Standard" model for $269: http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-cooler s/standard/aec-8000081.html The other is the "HE" (High Efficiency) models are $575: http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-cooler s/he-series/aec-8001646.html Any thought's on either of these two options? Pros and cons. The HE model s look a lot like the S&W model I have=2C assuming the pictures are accurate. Thanks for the feedback. Matt - Matt Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... RV-6 #20916 N360EM "The Flyer" http://www.mattsrv6.com - Matt's RV-6 Revitalization Log Status: 200+ Hours Since Purchase - Upgrades Complete=3B Now In Full Flyer Mode Matt's Livermore Airport Live ATC Stream! Check out the live ATC stream directly from my hangar at the Livermore Airport. Includes both Tower and Ground transmissions. Archives too! For entertainment purposes only. http://klvk.matronics.com t="_blank">http://www.matronics.com/Navigator?RV-List tp://forums.matronics.com _blank">http://www.matronics.com/contribution ________________________________ Message 8 _____________________________________ Time: 07:57:29 PM PST US From: RV6 Flyer Subject: RE: RV-List: Oil Cooler's... I originally flew my O-320 RV-6 in Southern California heat during Septembe r 1997 with an oil cooler mounted on the firewall with 3" SCAT tubing runni ng to it. I constantly had high oil temperature. Relocating the oil cooler to the en gine mount behind cylinder #4 with a full size opening duct to it just an i nch behind the cylinder lowered oil temp 30 degrees F. In a high heat environment with high power settings=2C I would not use a fi rewall mounted oil cooler and 3" SCAT to it. There is not enough air flow going through the oil cooler with the setup that I originally had. Gary A. Sobek "My Sanity" RV-6 N157GS O-320 Hartzell=2C 2=2C810+ Flying Hours So. 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