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  #31  
Old 12-05-2009, 02:46 PM
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N8RV N8RV is offline
 
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Location: Elkhart, Indiana
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Well, after a 3-week hiatus, I finally got to fly a little today. I have the Van's shutter installed on the back of the oil cooler, and have it shut completely. That gave me 180-degree oil the last time I flew (ambient temp down low was in the 50s).

Today, taking a cue from this thread, I put a piece of aluminum tape over about 1/4 of the FRONT of the oil cooler. The oil temp never got above 150 degrees! Of course, at 6500' the OAT was 12 degrees ...

I think I'll pull the cowling and slap on another piece of tape and keep doing so till the temps again climb to the 180-degree range. Might have to consider making some kind of shutter for the front of the oil cooler that's adjustable from the cockpit.
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Don McNamara
Peoria, AZ

Builder: RV-8 "Smokey"
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  #32  
Old 12-05-2009, 03:15 PM
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L.Adamson L.Adamson is offline
 
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Location: KSLC
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Quote:
Originally Posted by N8RV View Post
Well, after a 3-week hiatus, I finally got to fly a little today. I have the Van's shutter installed on the back of the oil cooler, and have it shut completely. That gave me 180-degree oil the last time I flew (ambient temp down low was in the 50s).

Today, taking a cue from this thread, I put a piece of aluminum tape over about 1/4 of the FRONT of the oil cooler. The oil temp never got above 150 degrees! Of course, at 6500' the OAT was 12 degrees ...

I think I'll pull the cowling and slap on another piece of tape and keep doing so till the temps again climb to the 180-degree range. Might have to consider making some kind of shutter for the front of the oil cooler that's adjustable from the cockpit.

This is a section of a reply to another thread that I wrote last week after installing the Van's shutter in front of the oil cooler between the #4 rear baffle and cooler. Put a few washers in between, & I had to get bolts that were 1/4" longer than the previous.

___________
I have a cheap and light Autozone cable that goes to the panel for in cockpit operation. With todays flights at the 8500 - 10500 msl. level, and outside temperatures between 25 & 31F -------- I was able to maintain oil temps between 185 & 195 in cruise, depending on power settings. In a sustained climb with shutter fullly closed, the temp went up to 220, but I had the option of dropping it from the cockpit.
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L.Adamson --- RV6A
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  #33  
Old 12-05-2009, 03:44 PM
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I got lucky...my shutter fit between the #4 cylinder baffling and the oil cooler with no modifications. I did note that if I cranked the bolts down too tight that the shutter was much harder to open/close. So I loosened them a bit...I may be at the bottom end of the torque range, so I'll keep an eye on it to make sure it's solid.
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RV-7A Flying!
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  #34  
Old 12-05-2009, 04:33 PM
David-aviator David-aviator is offline
 
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Location: Chesterfield, Missouri
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Quote:
Originally Posted by weekendflyboy View Post
Guys just found your post about the oil cooler air controllers.
I'm the guy who makes the Air controllers in the 4" and 3" version.

Thought I would post a link to some more pictures so you could get a better look at it.

http://picasaweb.google.com/ericrv6/...eat=directlink

I hope to have these pictures on the website along with some customer comments on how well they all like the air controller very soon.

Thanks,
I ordered this unit today.

With the Van's shutter full closed, I saw a max of 150F oil temp today. OAT was about 35F.
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  #35  
Old 12-05-2009, 07:04 PM
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Originally Posted by David-aviator View Post
I ordered this unit today.

With the Van's shutter full closed, I saw a max of 150F oil temp today. OAT was about 35F.
Hi David,
That's about what the OAT was when I got it up to 225 F. I'm really curious about all of these engines with cold oil temps. I would expect some variation, but nothing on the order of 70+ degrees. Now that I know my EFIS config was setup wrong, it makes me think there could be others with the same type of issue. Are you using an EFIS or EIS that requires configuration or calibration?
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  #36  
Old 12-05-2009, 07:52 PM
David-aviator David-aviator is offline
 
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Quote:
Originally Posted by lostpilot28 View Post
Hi David,
That's about what the OAT was when I got it up to 225 F. I'm really curious about all of these engines with cold oil temps. I would expect some variation, but nothing on the order of 70+ degrees. Now that I know my EFIS config was setup wrong, it makes me think there could be others with the same type of issue. Are you using an EFIS or EIS that requires configuration or calibration?
I am using EIS 4000. The oil temperature feature is pre-calibrated in the unit, there are no scaling numbers for it. The only thing that would make it not work properly is having the wrong sensor, they make two and they are quite different in resistance. I've checked the probe in hot water and it read within one degree of the digital cooking thermometer in the hot water, so the system is reporting accurate temperatures from the oil filter area where the sensor is installed.

The problem I have is the cooler on the firewall ala the RV-10 and much air is leaking around the Vans shutter. I got the oil temp up to 187 one time after a take off with a heat soaked engine and climb to 7500' with the shutter closed. I believe if my shutter were installed at the baffle to block air flow before the cooler as yours is, it would work better. As it is, it is installed at the air flow exit of the cooler and that's where I can't get it to seal adequately. I could move it but I think it will be easier to install that shut off valve I ordered. It will close off 100% of air flow.
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  #37  
Old 12-05-2009, 07:53 PM
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L.Adamson L.Adamson is offline
 
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Quote:
Originally Posted by lostpilot28 View Post
I got lucky...my shutter fit between the #4 cylinder baffling and the oil cooler with no modifications. I did note that if I cranked the bolts down too tight that the shutter was much harder to open/close. So I loosened them a bit...I may be at the bottom end of the torque range, so I'll keep an eye on it to make sure it's solid.
The same happened to me on the first install. Then I found that the oil cooler fins were actually pressing against the shutter assembly. The cooler flange just doesn't leave a gap. With washers, which actually allow some better airflow, the assembly once again moves easily. It had to, because my light weight skimmpy cable wouldn't push it open..... otherwise.

L.Adamson --- RV6A

Last edited by L.Adamson : 12-05-2009 at 07:59 PM.
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  #38  
Old 12-05-2009, 07:59 PM
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L.Adamson L.Adamson is offline
 
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Quote:
Originally Posted by David-aviator View Post
I believe if my shutter were installed at the baffle to block air flow before the cooler as yours is, it would work better. As it is, it is installed at the air flow exit of the cooler and that's where I can't get it to seal adequately. I could move it but I think it will be easier to install that shut off valve I ordered. It will close off 100% of air flow.
As it turns out, these shutters/ dampers have to be installed "before" the cooler to get acceptable results. Otherwise there is still to much heat transfer even though -- no or little air is moving through the cooler.

L.Adamson --- RV6A
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  #39  
Old 12-06-2009, 11:51 AM
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GaryK GaryK is offline
 
Join Date: Nov 2005
Location: Zeeland, Michigan
Posts: 398
Default Oil Cooler

The cable is near the oil door
[IMG][/IMG]


Vans oil cooler door works really well in front of the cooler



It seals the cooler completely and gets the oil temp up near 190 during the cold Michigan winters.


Gary
N715AB
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  #40  
Old 12-06-2009, 03:21 PM
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N8RV N8RV is offline
 
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Quote:
Originally Posted by L.Adamson View Post
As it turns out, these shutters/ dampers have to be installed "before" the cooler to get acceptable results. Otherwise there is still to much heat transfer even though -- no or little air is moving through the cooler.

L.Adamson --- RV6A
Yeah, I think that's my next project -- remove the shutter and re-install it in front of the oil cooler. Nice to know that I'm not the only one with temp problems ...
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