Mark,

  What Modine model number are you using for your 20B side port?

  I have two long narrow oil coolers (2"Thick x 5"W x 20L cores) each of
  which was normally found with a turbo charged 20B.  I hear they are
  getting rare.  I would rather use one under the engine and duct straight
  out the bottom.


  Doug in Japan
   ----------------------------------------------------------

  Doug,

  Sorry, I don't know the model number of the Modine cooler.  Core
   dimensions
  are roughly (from memory) 10" x 10" x 3".

  Mark S.


   ------------------------------------------------------------------------------
  Paul,


  I am considering Setrab once I get a ball park idea.  At this moment with
  a good clean design I am shooting for over 400 cu. inches.

  Cheers  Doug



   -----------------------------------------------------------------------------
   The ES has a very generous size cowl so there is plenty of room behind it.
   The worst thing about it is it looks at the red hot exhaust pipes.

   Paul Lamar

   --------------------------------------------------------------------
  Paul,
  Thanks.Mark has a
  nice inlet but like Dave Leonard  it exhausts to inside the cowl which
  is rather restrictive on the back side. At 280 hp max that is also
  the same approximate ratio as Dave at 1.07 cubic inches of cooling to
  each hp.  May not be enough on a hot day and long climb.


  Cheers

  Doug


   -------------------------------------------------------------------------------
   Hi Paul, Mark.

   Based on Marks comments I believe the ten x ten inch by three inch unit
   is the one mounted on the rear starboard side of his fire wall and its a
  water and oil combination unit.  It is shown in the picture I labeled
   "Mark-ES-left side." There doesn't seem to be much of a  gap behind
   it.
   The one on port side is bigger in cross surface area and is only for oil
   I think.  This was the one that wasn't functioning and the one I wanted
   the dimensions on.  Wetted area (minus the tanks) looks like about 11"
   wide and 13" something high.  Two inches thick is standard.  Mark is
   that about right?

   Why all the fuss?

   Well my engine and the mounting frame are now on a wooden jig so I can
   finalize placement of the  water pump and alternator, turbo charger and
   possible turbo-compound.  By playing with numerous pieces of foam and
   engine placements I found that for best CG  advantages for the SeaWind
   with minimal flat plate area I need to move the heat exchangers  as far
   forward as possible.

   Looks like your advice is half right Paul but to have a slim cowl I
   needed a dynofocal engine mount and a dry sump pump.

   The result is a  reverse flow U-shape water heat exchanger under the
   engine.

   Interestingly enough the cool side is not large enough for the needed
   water heat exchanger like you have shown in illustrations  but it is a
   perfect space for a tilt down (access to the plugs) oil cooler fed by a
   starboard nostril.  Flexible oil lines and design care make it possible.
  Air inlets ducting can be optimized and outlets for both heat exchanger
   exhaust directly to low pressure areas outside the cowl.  LOW COOLING
   DRAG.  Two cowl flap levers but that is fine with me.  Top inlet like
   you drew for me once is for the intercooler and it exhausts out the top.
  Hot air from inside the cowl exits around the exhaust pipe outlet oval
   hole.

   I dropped the supercharger idea with this test engine because of a better
   understanding of the blow down  turbine size needed to overcome its the
   supercharger requirements plus gain a significant power input.  I  will
   retain a large turbo charger with the compressor facing forward for
   normalizing at 18k critical. This will be ram fed through the port
   nostril.

   I'll keep the supercharger for testing though and eventually use the
   traction drive for a turbo-compounding trials  if bench testing
   indicates enough power can be grabbed from a reasonable sized turbine
   without slowing it down and melting it. More on this subject later.

   Great Christmas  present.  With the CG advantages I can mount the starter
   battery up in the engine mount frame and save 15 feet and many pounds of
   large heavy cabling runs.Still room for a few cases of beer as well:)

   Doug in Japan



  Doug,

  The Fluidyne air/oil cooler is on the port side.  The core area for that
  one is 9.5" x 11" x 3".  The one mounted on the firewall is an oil/water
  cooler.  I don't have the core dimensions handy, but I would guess them to
  be approx 6" x 12" x 2".  Since I replaced the defective oil/air cooler
  with
  the Modine unit, which is working very well, I have disconnected and plan
  on removing the oil/water exchanger.

  Mark S.

  Mark,


  Thanks.  So your total [oil] is about 313cu. inches, I'm guessing your max
  power is 280Hp and so your hp to cooling ratio is about 1.1: 1 or
  similar to Dave Leonards.  That is good news.  I am ball parking
   400 cubic inches with 310hp.  Thanks again and Merry Christmas to all.

  Doug in Japan

  ---


  Mark,

  I figured it out as I see you mentioned core area. The Fluidyne model
  number is  DB-30617 and can be ordered in a dual pass with or single
  pass like yours I believe,

  One place that sells them is here.
   http://www.customcarscentral.com/fludb30616-universal-all-makes.html

  Cheers


  Doug in Japan


Doug,

Yes, the dimensions given were for the core.  I think you can also get them
from Summit Racing.

Mark


Mark,

I'll order the oil cooler after the New Years.

Now I am on to finalizing the water heat exchanger.   What size radiator
did you use?   In my research I found that C&R makes a great line of
custom radiators.   One row type thickness is 37mm or 1.45" thick.  Two
rows are 57mm thick or 2.2" inches.  I pretty much realized that to get
the cooling I need and to maximize the frontal area on the heat
exchanger I will have to go under the engine like Paul has shown in his
book.  However to get the performance in my relatively narrow cowl I
will have to go with a cross counter flow unit.

Mistral layout is sweet but I am not entirely sure what I am looking at.
Perhaps the bottom one is for oil?  The flows go from side to side.
Paul can you enlighten us here?

Preliminary calculations with my present tight cowl shows I can fit  19"
wide by 18" deep cores with another 2.5 inches added for the tanks.  If
it will be a counter flow design and each core is 1.45" thick, then
effective core thickness is 2.9".  Total is  991 cubic inches  Too much?

Doug in Japan

Yes the bottom one was oil but this is not a good way of doing it as
the one that gets the hot air from the other must be larger.
Temperature difference is everything. One degree F in air temp is a 1%
change in cooling. You have a long cowling so I would put at least
one heat exchanger on the cool side of the engine.

Paul Lamar