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  #1  
Old 09-22-2019, 10:21 PM
N670SB N670SB is offline
 
Join Date: Jul 2009
Location: Aliso Viejo, CA
Posts: 8
Default RV-8 oil cooler recommendations

I'm looking for recommendations for the oil cooler for an RV-8 I'm finishing the build on (IO-360 angle valve with C/S prop, stock comp, and electronic ignition). Has anyone has mounted an 11 row cooler and if so how much effort did it take to fit it in the -8 cowling?? For those who have experience with the 8 row recirculating oil cooler in hot climates, how have your oil temps been in climbs. I'm thinking the 8 row recirculating cooler is probably adequate, and fitting the 11 row may be problematic. Thank you in advance!!!
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  #2  
Old 09-23-2019, 05:59 AM
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Onewinglo Onewinglo is offline
 
Join Date: Apr 2016
Location: Hammond, LA
Posts: 92
Default It Can Be Done...

We mounted an oversized oil cooler but attached it to the engine mount. We later added a butterfly valve to throttle the cooling flow in order to get oil temp up to 180*. I don't remember the brand and row number but I'll look. Parallel valve Superior O360.
https://photos.app.goo.gl/bjZsuhdu9KM8VXtm8
https://photos.app.goo.gl/1Y8gCNVr2vuNhUad6

Our oil cooler is a Dual Pass, 8 row cooler recommended by Pacific Oil Cooler. It's a bit bigger than we needed. We have a fixed pitch prop.
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Last edited by Onewinglo : 09-23-2019 at 11:45 AM. Reason: More info
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  #3  
Old 09-23-2019, 06:03 AM
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DanH DanH is offline
 
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Location: 08A
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I started with a SW/Meggit 10599 and later switched to a 10611. I've never counted rows. Both were remote mounted, which was not an issue. I've seen multiple approaches to mounting.

There are a lot of opinions about acceptable oil temperature. Mine is that I never want to see 210F, but will accept short excursions to around 205 in a long climb. Likewise I want oil temp within the same parameters given a taxi of any length, or multiple laps around the Ripon approach at 90 knots.

Both coolers were full ducted. With the 10599, I played with ducting cold air to the cooler, bypassing the hot fins in the upper plenum. The supply temperature difference was 16F. It worked, but a larger cooler worked better overall.

Exit ducting runs to a converging bell in the cowl exit. Pressure at the end of oil cooler duct is about 1.5" H2O above freestream static in cruise. Typical lower cowl pressure for RV's is 1.5" to 2" at cruise, with some examples outside those points. My lower cowl pressure in cruise is more like 6", as I run a very small cowl exit. The cooler would not have enough air pressure drop across it without the exit ducting.

http://www.vansairforce.com/communit...&postcount=197

IO-360 angle valve/CS with standard cowl? Remote 10611 or similar. Parallel valve engines without squirters need less. Fixed pitch needs less.
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Last edited by DanH : 09-23-2019 at 06:05 AM.
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  #4  
Old 09-23-2019, 08:23 AM
p51dplt p51dplt is offline
 
Join Date: Nov 2012
Location: Nut Tree, CA
Posts: 164
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Quote:
Originally Posted by DanH View Post
I started with a SW/Meggit 10599 and later switched to a 10611. I've never counted rows. Both were remote mounted, which was not an issue. I've seen multiple approaches to mounting.

There are a lot of opinions about acceptable oil temperature. Mine is that I never want to see 210F, but will accept short excursions to around 205 in a long climb. Likewise I want oil temp within the same parameters given a taxi of any length, or multiple laps around the Ripon approach at 90 knots.

Both coolers were full ducted. With the 10599, I played with ducting cold air to the cooler, bypassing the hot fins in the upper plenum. The supply temperature difference was 16F. It worked, but a larger cooler worked better overall.

Exit ducting runs to a converging bell in the cowl exit. Pressure at the end of oil cooler duct is about 1.5" H2O above freestream static in cruise. Typical lower cowl pressure for RV's is 1.5" to 2" at cruise, with some examples outside those points. My lower cowl pressure in cruise is more like 6", as I run a very small cowl exit. The cooler would not have enough air pressure drop across it without the exit ducting.

http://www.vansairforce.com/communit...&postcount=197

IO-360 angle valve/CS with standard cowl? Remote 10611 or similar. Parallel valve engines without squirters need less. Fixed pitch needs less.
Dan,
Do you have some photos of the current inlet and exit duct installed in the airplane?
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  #5  
Old 09-23-2019, 08:58 AM
elev666 elev666 is offline
 
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Location: Kincardine Ont,Can
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Default Butterfly Valve

We mounted an oversized oil cooler but attached it to the engine mount. We later added a butterfly valve to throttle the cooling flow in order to get oil temp up to 180*. I don't remember the brand and row number but I'll look. Parallel valve Superior O360.
https://photos.app.goo.gl/bjZsuhdu9KM8VXtm8
https://photos.app.goo.gl/1Y8gCNVr2vuNhUad6

JP , would you happen to remember were you sourced the butterfly valve you used , I?m using a FW mounted 13 row and there will be days I need to close off cooling air flow here , yours looks nice and light and will save me reinventing one here !
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  #6  
Old 09-23-2019, 09:39 AM
airplanem airplanem is offline
 
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Location: tylertown, ms
Posts: 7
Default Cooler

Put the big one
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  #7  
Old 09-23-2019, 09:55 AM
chaskuss chaskuss is offline
 
Join Date: Mar 2005
Location: SE Florida
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Quote:
Originally Posted by DanH View Post
I started with a SW/Meggit 10599 and later switched to a 10611. I've never counted rows. snipped
The 10599's core has 8 rows.

The 10611's core has 11 rows

Both cores are 6" wide

Charlie
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  #8  
Old 09-23-2019, 09:59 AM
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Danny King Danny King is offline
 
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Location: Southlake, Texas
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Quote: I started with a SW/Meggit 10599 and later switched to a 10611. I've never counted rows. Both were remote mounted, which was not an issue. I've seen multiple approaches to mounting.
DH
----------------------------------------------------------
Dan,

I am currently using the 10599 on my I0360A1B6 and cruise around 200F-205F. I know that is within limits, but would love to cruise closer to 190F. Would swapping my 10599 for a 10611 accomplish that? Will the 10611 mount in the foot print of the 10599? My 10599 is mounted behind #4 on the aft baffle.

Thanks,
Danny
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  #9  
Old 09-23-2019, 10:57 AM
scsmith scsmith is offline
 
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Location: Ashland, OR
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Default

Perhaps a moderator could move this thread out of the classifieds.

It should be noted that parallel valve and angle valve engines put very different heat loads into the oil. So recommendations for the OP from folks with parallel valve engines are not very meaningful.

With the angle valve engine, you want the biggest cooler you can get.
Mount it on the firewall with a low-resistance supply duct from the upper plenum, and include a butterfly valve to adjust flow for winter.

For a standard lower cowl exit, just dumping the cooler flow into the lower plenum will work fine. For reduced-area exits, it may be required to duct the cooler exit down and out the cowl exit as Dan described.
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  #10  
Old 09-23-2019, 11:21 AM
rvisnext's Avatar
rvisnext rvisnext is offline
 
Join Date: Oct 2014
Location: WA
Posts: 73
Default 13 row

Quote:
Originally Posted by N670SB View Post
I'm looking for recommendations for the oil cooler for an RV-8 I'm finishing the build on (IO-360 angle valve with C/S prop, stock comp, and electronic ignition). Has anyone has mounted an 11 row cooler and if so how much effort did it take to fit it in the -8 cowling?? For those who have experience with the 8 row recirculating oil cooler in hot climates, how have your oil temps been in climbs. I'm thinking the 8 row recirculating cooler is probably adequate, and fitting the 11 row may be problematic. Thank you in advance!!!
Showplanes.com makes what I believe is the best solution without having to put the bigger oil cooler on the firewall. This is what I use with my angle valve 390, check it out on their website.
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