I believe parallel coolers will be more efficient due to the higher  delta T. In a serial set up, the liquid in the second cooler will be  lower temp. and less efficient heat transfer will take place. Just an  opinion of an eyeball engineer?
Buly
On May 5, 2006, at 11:34 PM, Kelly Troyer wrote:

Bob,
  One other comment........There is some difference of opinion  among the group
whether connecting coolers (oil or coolent) in series (as you  propose) or in
parallel is the most efficient method.........We have group members currently
flying with both methods........Most that I am aware of  that use  both methods
are for coolent systems as not many are using two oil  coolers........I personally
lean toward a parallel coolent system........Any comments from  others in the
group about this question would be welcome as I know we have  several with
experience or training in this area !! What would be most efficient  for one
system should probably apply to the other.......IMHO
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from enpowell@comcast.net:  --------------

Bob,
I think you should have made the lines larger to help lower presure  drop in the long lines.  I understand that the extra oil in the  lines will be heavy but the pressure drop would be a tradeoff that  I wouldn't want to make.

Ken Powell
Bryant, Arkansas
501-847-4721
C150 / RV-4 under construction

-------------- Original message --------------
From: BMears9413@aol.com
I'm running two oil coolers in the Spitfire. Due to the lengthe of  the lines and volume of the two coolers I reduced my oil lines to  AN8 (I think stock they were 10?) Now, before I close everything up  I'm having second guessing. My total line length will be around  12'. I had planned on running the lines to one oil cooler, then the  other, then back to the motor.
Any comments?

Bob Mears

Buly
http://tinyurl.com/dcy36




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