VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Main > RV Ongoing Maintenance Issues
Register FAQ Members List Calendar Today's Posts

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 04-30-2016, 08:42 AM
Al RV8 Al RV8 is offline
 
Join Date: Mar 2011
Location: Schwenksville PA
Posts: 42
Default

Does anyone have the part numbers for the viscosity valve and where to order?

Thanks!
__________________
Al Rubin
N80AR RV8 flying
Based at KPTW
Reply With Quote
  #12  
Old 04-30-2016, 05:47 PM
Rupester Rupester is offline
 
Join Date: Dec 2005
Location: Mahomet, Illinois
Posts: 2,195
Default

For whatever reason, the O-320 D1A and D2As don't dump much heat in the oil. A number of flyers with those engines, me included, have observed this. I have exactly the same issue with my IO-320 D2A in the winter months, even with the oil cooler fully blocked off. I flew in 24F OAT a few weeks ago and never saw the upside of 158F O.T. Less than 2 weeks later the OAT was up to 72 and I again flew (with the oil cooler stilled 100% blocked off) and my max OT was 191F.

A couple years ago, one of our local hangar curmudgeons observed, "For whatever reason, the O-360s seem to dump a lot more heat to the oil than the 320s." That does in fact seem to be the case.
__________________
Terry Ruprecht
RV-9A Tip-up; IO-320 D2A
S. James cowl/plenum
(Dues paid thru Nov '18)
Reply With Quote
  #13  
Old 04-30-2016, 07:03 PM
selhardt's Avatar
selhardt selhardt is offline
 
Join Date: Dec 2008
Location: Minneapolis, MN
Posts: 113
Default I installed a valve and relief in my RV-8

Here is what I did. Two winters and summers and it just works.


http://www.vansairforce.com/communit...=104139&page=2

I have pictures of the install - pm me if you want them.
__________________
Scott Elhardt
RV-8 N32SE -Finished!
Grove Gear, XIO-360-M1B
Whirlwind RV200
Dual PMags

Pitts S-1S Restoration in process!

Minneapolis, MN
Reply With Quote
  #14  
Old 05-07-2017, 09:47 PM
DartDriver DartDriver is offline
 
Join Date: Dec 2010
Location: New Hartford, NY
Posts: 12
Cool Low Oil Temps

I've been working low oil temps for a year now, and my performance is like you guys ... RV-8 with IO-360 M1B. What I've learned to date:

1. Vernatherm works as advertised. Tested proper expansion on my stove using a candy thermometer.
2. Oil Temp gauge works as advertised.
3. Installed cockpit-controllable oil-cooler vent (fully blocked) only helps to increase oil temp in warmer weather or higher power settings.
3. Cruising around at 10K ft., at 45% power, LOP, economy cruise, 35 degrees OAT, I see 160 degrees if I'm lucky...more like 150 degrees at 30 degrees OAT.

My conclusion is I've done a good job sealing up the cowling leaks (good), but everything works so well that the stock Van's intake/exhaust is too large for the cooling job. As a point of reference, Sam James cowling reduces intake area by 40%.

I've moved onto experimenting w/ smaller intake/exhaust areas, and encourage others to do the same. Will share my results once my grass strip has a chance to dry out (this has been a very wet spring for us in central NY!).

First step is to reduce the intake area by 25%. I've done this using foam strips inside the intakes and can't wait to fly!
__________________
Mike Baldwin
dart.com
Reply With Quote
  #15  
Old 05-08-2017, 10:22 AM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 2,791
Default

Quote:
Originally Posted by Rupester View Post
For whatever reason, the O-320 D1A and D2As don't dump much heat in the oil. A number of flyers with those engines, me included, have observed this. I have exactly the same issue with my IO-320 D2A in the winter months, even with the oil cooler fully blocked off. I flew in 24F OAT a few weeks ago and never saw the upside of 158F O.T. Less than 2 weeks later the OAT was up to 72 and I again flew (with the oil cooler stilled 100% blocked off) and my max OT was 191F.

A couple years ago, one of our local hangar curmudgeons observed, "For whatever reason, the O-360s seem to dump a lot more heat to the oil than the 320s." That does in fact seem to be the case.
this is same for me. I don't worry about the oil temp on my -9. Block the oil cooler in the Winter and open it in the Summer and just fly it.
__________________
Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 800+ for all

Simplicity is the art in design.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
Reply With Quote
  #16  
Old 05-08-2017, 10:38 AM
JBPILOT JBPILOT is offline
 
Join Date: Nov 2007
Location: Jesup, Iowa
Posts: 1,658
Default No research at all, but - -

On ROTAX we can install a thermostat that works very well. Does not allow oil to go thru cooler until up to therm temp range. Uses 1/2" ID hose. Maybe that is an issue. Just noting.
__________________
John Bender
Flying RV-12 - Serial #120036
Paid in May ( 5-2020 )
Reply With Quote
  #17  
Old 05-08-2017, 01:04 PM
Rupester Rupester is offline
 
Join Date: Dec 2005
Location: Mahomet, Illinois
Posts: 2,195
Default Check your oil analyses ....

I used fret over low oil temps, but eventually decided to just watch my oil analyses carefully, since the lab always tests for water content. I've yet to have an oil report show any water at all. So - following the advice above - I block the cooler in winter, open it summer, and just "fly the plane."
__________________
Terry Ruprecht
RV-9A Tip-up; IO-320 D2A
S. James cowl/plenum
(Dues paid thru Nov '18)
Reply With Quote
  #18  
Old 05-08-2017, 09:56 PM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,298
Default

Quote:
Originally Posted by Rupester View Post
I used fret over low oil temps, but eventually decided to just watch my oil analyses carefully, since the lab always tests for water content. I've yet to have an oil report show any water at all. So - following the advice above - I block the cooler in winter, open it summer, and just "fly the plane."
same here. I am not in the camp that believes running oil temps in the 140-160* range causes damage. It is really a matter of temp & run time, along with the oil's retained water volume. I have all confidence that limited water will evaporate at 140* on a 1.5 hour run. However, load up your oil with water by a bunch of successive short runs and you'll struggle to get the water out at lower temps. High temps as well. The lower the temp, the longer the run needs to be to get rid of water. However, an engine that doesn't see short runs does not create a significant build up of water that needs to be removed.

Larry
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019

Last edited by lr172 : 05-08-2017 at 09:59 PM.
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 08:22 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.