REFLECTOR: One or Two oil coolers?

[Gary Stull]

I have an IO360C1C which has the spray nozzles you referenced. I have a single cooler, although it is large, out of a Cherokee 6 with a 540 engine. CHT's never exceed 400 and oil temp never over 210 even during extended climb here in Florida. Cruise temps 340 CHT and oil 180 even while down low on a hot day, so a single cooler can work. 
  ----- Original Message ----- 
  From: HYTEC45 at aol.com 
  To: reflector at tvbf.org 
  Sent: Monday, May 14, 2007 10:02 AM
  Subject: Re: REFLECTOR: One or Two oil coolers?


  In a message dated 5/11/2007 7:12:26 P.M. Pacific Standard Time, scott at tnstaafl.net writes:
    Its funny we have those that have or had an IO360 powered Velocity that 
    ran just fine on one cooler.  Direct experience told them that the 
    standard configuration built correctly works just fine..   These are 
    real life Velocities flying today that don't have a problem with one 
    cooler. 

    Then there are those that one cooler didn't seem to do the job,  we will 
    never know why for sure. So their cure was to install another cooler, 
    which is fine.  But these folks just can't admit that there are 
    Velocity's flying around with one cooler and working fine.  Why can't 
    they admit that?

   Here is another example of the reflector becoming a "chat Room" with posts not relating to any real data that is helpful to a builder.  Great info, some work with one, some don't, but let me stir some sh*t.  Let me offer some data, and this as a possible explanation.  Some 360's have oil spray nozzles in the main case.  These nozzles spray oil directly onto the base of the pistons for additional cooling.  This was done to lower CHT, but with a cost.  Guess what that is?  Higher Oil temp #1.  The nozzles also tap off some oil pressure and at higher oil temps, and this is detectable.  I don't like seeing 70PSI when oil temps are above 220' in my engine.  As I mentioned in a earlier post, oil temp relates to the life of your engine.  Some think that staying just below red line is fine, and again, I don't care.  I also have a stock 172 and It has oil temp issues in the summer.  Funny, this Cessna sled has a green zone, followed by a red line on the oil temp gauge with no yellow zone.  Some posts regarding one cooler mention they have climb restrictions.  When I had one cooler, I had climb restrictions to due to high oil temps even though my CHTs never got above 380(nozzles). Now, I can climb out of anywhere, to any altitude with 10:1 and never back off, and stay below 210 oil temp,and 360CHT and stay above 73psi.  If that can be done with one cooler, super and I'm all ears!!

  So, who ever posted that there new Velocity has oil temp problems, and is scratching there head now with all the confusion,  see if your engine is a model with nozzles and do some investigation.
  TEC





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