The stock core is 5.5 by 19 as I recall. would not hurt to make it
six inches wide or 6.5 inches wide and the same length as the water
core.

BTW if you put the stock oil rad up on the right side you
need a way of getting the heated air out. Atkins uses fixed louvers on
the
side of the cowl and that works fairly well. If you use a square
after market oil cooler you have more of a problem getting the hot air
out. The square oil cooler could be mounted on the inside
of the right side cowl wall and a wedge shaped diffuser to feed it from
the right side cheek scoop. A square set of fixed louvers would
then be used.

Most cowls are wide enough on the bottom to put the oil
cooler next to the rad down there. The plumbing is short and sweet.
And you can control the temp as well as squirt a little hot air back
to reduce the cooling drag.

 The cowl louver flaps can be built around
one inch dia. .035 wall steel tube which will be plenty strong/stiff
enough
at 25 inches or more wide. You could have a six inch wide oil cooler
and a 18 inch wide water rad. for a high power turbo engine you will
need it. if the cores are 19 inches long and two inches thick
that is 684 cubic inches for the water and 228 cubic inches for the oil
rad.

Paul

This width of cooling package can work for turbos since they run the
exhaust out the side.  For normally aspirated, engines the exhaust will
have to run out the bottom, I think.  A side exhaust port will not work
on the ST exhaust because the exhaust gas can flow straight through.  A
bottom exhaust pipe limits the total width to about 18 inches even when
it is kicked out like mine. The louver flaps are not the outside
measurement.  Outboard of these are the bushings the axles ride in.

  Would it be possible to move the rad and oil cooler package center to
the right?   If so, could the inlet still be centered  so the cowl
looks right?

  I think yoking the oil cooler and the radiator together "looks"
  like a simplification, but it is not.  It is too tight.       Jerry

The the bushings for the axles can be a just sheet metal.
There is not much motion in these things so they will last a long
time. We are talking 1/8th of an inch. Use plastic bearing inserts for
sheet metal.  Yes the rad and  oil cooler
can be off set. The bottom width of the cowl on the Tailwind
is 33 inches. The width of a 6 inch oil cooler and a 19 inch
rad core is 25.  That leaves 4.5 inches or maybe 3.5 inches 
on each side. Fits my Kis no problem. 

Here is another idea. If you don't mind rectangular exhaust 
pipes coming out the bottom and turn 45 degrees to come out
the side of the cowl near the bottom. the secret to clearing
the MM tubes is tilt it forward about 30 degrees.

Paul Lamar
 
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