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  #11  
Old 01-30-2015, 06:26 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
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Quote:
Originally Posted by Fly2KiteSurf View Post
Guess I should have clarified. Thanks for pointing that out.....

I am not interested in a larger oil cooler. I just don't like the weight and stress up on the cooling baffles and repairing cracks and patches, etc...

I can fix the current cracks on the -7 I just purchased, or relocate the oil cooler to the firewall?

Thought about using the 10 or 14 oil cooler bracket if it fits (or similar bracket if available) on the firewall of my -7, but use the standard smaller oil cooler.

Hope that clarifies things.

Advise appreciated.
I am building a 7. A 180hp, parallel valve, no cooling jet engine. I considered seriously whether the baffles could be made durable. After researching for hours and days, I concluded that the three things would achieve that (durability), an angle along the LR corner, a stiffener from the top left corner of the cooler angling down to the head screw, and a stiffener from the upper right corner of the cooler forward to the engine case. The first two stiffeners attach to the two screws on the #4 head. The third stiffener addresses the wagging, pivoting, along the corner. Paul Dye replaced his baffles and documented the process here.

Concluding they will be durable, I decided to mount mine to the baffles in the standard manner. YMMV

Positives for the remote mount are air flow control and any risk of baffle cracks. The negatives are, careful attention must be paid to ensure adequate airflow, and the pain of a modified installation. Although there are many well made successful installations, some are not.

I am admittedly jaded being off plan on too many items already and not wanting (needing) to tackle this one.

So, I would advise (verb) you to appropriately beef up the baffles. That is my advice (the noun). Either way can be durable and cool.
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RV-7
Lord Kelvin:
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Last edited by BillL : 01-30-2015 at 06:28 PM.
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  #12  
Old 05-24-2016, 06:51 PM
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Tbone Tbone is offline
 
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3mxc,
Do you have any pictures of your oil cooler mounted with the engine and mount affixed to firewall. Would like to see the clearance allowed.
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  #13  
Old 05-24-2016, 06:58 PM
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RV7Guy RV7Guy is offline
 
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Location: Chandler, AZ
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Default IO390

I'm putting an IO390 on the new 7. I mounted the engine then held everything in place to get clearances. Removed the engine and put everything on the firewall. Here's a pic of the progress so far. The engines goes back on permanently after I get back from vacation in a couple of weeks.


[IMG][/IMG]
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Last edited by RV7Guy : 05-24-2016 at 07:01 PM.
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  #14  
Old 05-24-2016, 07:21 PM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
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Quote:
Originally Posted by Fly2KiteSurf View Post
Guess I should have clarified. Thanks for pointing that out.....

I am not interested in a larger oil cooler. I just don't like the weight and stress up on the cooling baffles and repairing cracks and patches, etc...

Thought about using the 10 or 14 oil cooler bracket if it fits (or similar bracket if available) on the firewall of my -7, but use the standard smaller oil cooler.

.
I share your aversion to baffle mounted coolers. I recommend however to not use the RV-10 firewall bracket. For me it creates unnecessary airflow backpressure from the multiple changes in airflow direction. On my RV-10 the cooler is mounted horizontally and has a simple plenum on top to connect the scat hose.

Use the cooler you have (unless you have reason not to). Make a simple bracket out of .063 aluminum angle, feed it with a 3" hose off the baffle and use a butterfly valve.

Carl
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  #15  
Old 05-24-2016, 08:20 PM
DaveO DaveO is offline
 
Join Date: Dec 2012
Location: Greenfield, IN
Posts: 341
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When i built my 7A I mounted the oil cooler on the firewall using a home made bracket. 3 inch hose. I did not use RV-10 cooler. Worked good.
Dave
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  #16  
Old 05-25-2016, 03:29 AM
RViter RViter is offline
 
Join Date: Jun 2009
Location: Mesa, AZ
Posts: 242
Default Oil Cooler - orientation?

Quote:
Originally Posted by RV7Guy View Post
I'm putting an IO390 on the new 7. I mounted the engine then held everything in place to get clearances. Removed the engine and put everything on the firewall. Here's a pic of the progress so far. The engines goes back on permanently after I get back from vacation in a couple of weeks.
Interesting Pic with the Vertical Power PPS - which doesn't seem to be 'available' anywhere on their web site ... ;-o

Question - Your oil cooler is mounted with BOTH inlet and outlet on the topside, and I was under the impression that generally this would be inlet on the LOWER, and outlet on the UPPER fittings, respectively. The concept of thermal rise to engine return line consistent with that. Of course, the forced flow may negate any such thermal flow factors. Maybe?

Very shiny stainless FW!!
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  #17  
Old 05-25-2016, 05:29 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
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Quote:
Originally Posted by RViter View Post
Interesting Pic with the Vertical Power PPS - which doesn't seem to be 'available' anywhere on their web site ... ;-o

Question - Your oil cooler is mounted with BOTH inlet and outlet on the topside, and I was under the impression that generally this would be inlet on the LOWER, and outlet on the UPPER fittings, respectively. The concept of thermal rise to engine return line consistent with that. Of course, the forced flow may negate any such thermal flow factors. Maybe?

Very shiny stainless FW!!
Honestly, I am not sure why the locations would make a difference in this case. Locating the inlet on the lower side makes good thermodynamic sense if baffle mounted as the hotter oil would engage with the hotter air off the head on the lower side. That would leave the delta-T of the top side still able to remove more heat from the oil. In this case, it is not clear if the air coming in has any temperature gradient across the face to benefit from a port location change.

This is certainly open to discussion.
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RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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  #18  
Old 05-25-2016, 12:13 PM
Evolution10 Evolution10 is offline
 
Join Date: Jun 2014
Location: oregon
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Mike at Avia comp (http://www.aviacompinternational.com) manufactures the butterfly as well as many other interesting items. He also makes the stainless heater boxes. He probably sells to ACS, AVERY, ETC...
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