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-   RV General Discussion/News (https://vansairforce.net/community/forumdisplay.php?f=2)
-   -   Oil cooler Shutter Installlation (https://vansairforce.net/community/showthread.php?t=159508)

rdrcrmatt 04-13-2018 11:54 AM
I installed this in my oil cooler scat tube where it meets the oil cooler baffle.

http://www.tcwtech.com/control_valve_servo_kit.html

Worked great for winter. I was getting oil temps in the low 140?F range when it was 0?F OAT. Now I can get 200?F in the same conditions.

OldNavy 04-18-2018 12:46 PM
Thank you
 
A very big 'Thank you' to all of you for helping me with this project. I ended up installing the shutter on the back/exit air side of the cooler. I'll try to attach a picture of the installation. Again, Thank you very much.
PS: Hate to admit this, but I could not figure out how to attach a picture, sorry

BillL 04-18-2018 04:11 PM
Quote:
Originally Posted by OldNavy (Post 1253963)
A very big 'Thank you' to all of you for helping me with this project. I ended up installing the shutter on the back/exit air side of the cooler. I'll try to attach a picture of the installation. Again, Thank you very much.
PS: Hate to admit this, but I could not figure out how to attach a picture, sorry
Good to hear you got it done, but don't be surprised at the reduced effectiveness in cold weather. Be prepared to move it to the front if it does not meet your flying conditions. It is very effective in the front.

rzbill 04-18-2018 07:24 PM
Quote:
Originally Posted by BillL (Post 1252466)
Nothing magic, but it does take proper attention to fitting. My Vans sourced was tight and since the location requires sandwich between the cooler and baffles, the ripples in the surfaces made it too tight to move. I used some thin washers (one on each side at each fastener) and then filled the gap with RTV. The washer between the shutter and the cooler allows more air to flow to, as some of the shutter would block airflow through the fins. No fin trimming needed.

Be warned, I was concerned about being too tight, but now, after only 12 hours it won't stay in one position. It moves like butter. Since the shutter is parallel to the rocking vibration of the engine, it tends to settle in between a maximum position. Point being- you might want a provision to ensure it stays where you want it, not just a slippery Bowden cable. YMMV I am considering a vernier control.

Edit: Thanks Joe [RV7Flyer] I will certainly check out the McFarlane cables.
Bill,
I'm sure the McFarlanes will work. ACS brand also has a push to unlock cable. A-700 button lock. The center button is smaller but works the same. I had to use one on my heater valve because the ratchet style cable from Vans would not hold it in place. Tried messing with the ratchet spring but to no avail.

Simon Hitchen 04-19-2018 04:16 AM
I tried that
 
Due to ease of installation I initially mounted the shutter on the rear of the cooler too but It didn?t work effectively. To raise the oil temperature I still had to tape the front of the cooler closed. Take the time and locate it properly between the baffle and cooler. It?s the only way it works if you?ve got cold outside air temperatures.

scsmith 04-19-2018 12:16 PM
Quote:
Originally Posted by Simon Hitchen (Post 1254086)
Due to ease of installation I initially mounted the shutter on the rear of the cooler too but It didn?t work effectively. To raise the oil temperature I still had to tape the front of the cooler closed. Take the time and locate it properly between the baffle and cooler. It?s the only way it works if you?ve got cold outside air temperatures.
Why should it matter whether you throttle the flow at the inlet side rather than the outlet side of the cooler? The only reason I could see is significant leakage around the perimeter of the louver mounting plate letting air through the cooler even with the louvers closed.

rvbuilder2002 04-19-2018 12:27 PM
Quote:
Originally Posted by scsmith (Post 1254180)
Why should it matter whether you throttle the flow at the inlet side rather than the outlet side of the cooler? The only reason I could see is significant leakage around the perimeter of the louver mounting plate letting air through the cooler even with the louvers closed.
Steve,
Real world experience has proven it does matter.
Blocking the flow off at the back does raise the temps some, but there is apparently a lot of cooling that still occurs just from cold air blowing on the exposed front side of the cooler, even if there is no flow through it.
Blocking at the rear works for moderately cold temps like we have here in W. Oregon but in very cold temps, it probably isn't enough. That is were blocking at the front is beneficial, though the style of block-off being discussed here is detrimental to some degree in hot temps because even full open it is blocking the inlet flow somewhat so some users might have to remove it during the summer.

scsmith 04-19-2018 05:40 PM
Ah thanks Scott, that makes sense.

Both your points are why I used one of these

http://www.tcwtech.com/control_valve_servo_kit.html
on my firewall mounted cooler. The throttle valve is flanged and mounted to the rear baffle.

BillL 04-19-2018 06:57 PM
It is not about how much the area will flow, it is the blocking.
 
Quote:
Originally Posted by RV8JD (Post 1254243)
Anti Splat Aero claims their shutter doesn't block any of the air flow when fully open:
"No restriction, when fully open these will flow 35% more air than the oil cooler will pass."
They may claim this but that does not make it true. There is a blocking of a portion of the fin flow area by the cross bars, especially when it is mounted right against the face of the cooler. I spaced mine out .063 with a standard washer to mitigate this somewhat.

Edit: Lets assume that the statement that shutter flows more air than the cooler can is true. It implies that there is no reduction in cooling capacity. Lets look at a couple of facts: Fact 1. it does present an additional flow restriction in the path of air flow through the cooler, and Fact 2. since the cross bars block a portion of the fins (if mounted in contact with the cooler face) it is impossible that the cooling is not reduced by some relation to that fin area. Granted that the cooler capacity may well have adequate cooling, but it will be diminished for the same upper cowl pressure.

Northernliving 01-20-2019 07:50 AM
Shutter
 
Quote:
Originally Posted by scsmith (Post 1254239)
Ah thanks Scott, that makes sense.

Both your points are why I used one of these

http://www.tcwtech.com/control_valve_servo_kit.html
on my firewall mounted cooler. The throttle valve is flanged and mounted to the rear baffle.
I'm also installing one of these on my cooler shutter. What a great little device!
http://www.tcwtech.com/control_valve_servo_kit.html

I was thinking of mounting my shutter on the rear of the cooler, but decided to do a little more work and put it on the front. Reading through these notes seems to confirm that this is the best way. I'm thinking of cutting a spacer on the water cutter the same shape and dimensions as the shutter so that it is spaced off the cooler itself my say, 1/8 inch.

Anyone know what kind of bolts bolts hold the cooler on? I need to buy some that are a little longer. I assumed they were AN bolts, but they have an X and OIDO on the head. They are 10/32.

Thanks.


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