>>  >>  >>  >  I will need an idiot proof drawing.  Jerry
 >>  >
 >>  >>  >OK :-) What are the exact dimensions of your rad core?
Just the core!
 >>  >>  >Are you planning on mounting it long ways?
 >>  >>  >
 >>  >>  >Paul Lamar

 >>  >>  13 inches x 18 inches  Mounted long way.   Jerry

 >>  >OK That means of course you are going to need a space
 >>  >above the rad core at its leading edge of (235 *.3) /13 or
 >>  >5.4 inches. Do you have room under the oil pan for that?
 >>  >
 >>  >If you mounted it sideways you would only need 235 * .3 /18
 >>  >or 3.9 inches.
 >>  >
 >>  >Still want to mount it long ways?   Paul Lamar

 >>  If I were starting over I would set the radiator sideways, however,
 >>  that is no longer an option.  No, I cannot  achieve the optimum

 > >>  opening at the leading edge of the core.  The maximum available is
 > >>  4.75 inches.  At the leading edge of the rad header tank, the plenum

 >>  opening is 5.188 inches.   May not be optimum but it is very good.
 >>  I suspect that a MUCH smaller opening will prove to be adequate as
 >  > long as a good pressure drop through the radiator is achieved.  If
 >  > the louvers are efficient, no problem.  If they are not, then no
 >  > intake plenum regardless of size or shape will make a damn bit of
 >>  difference.  Just an uneducated opinion, mind ya.    Can the test box
 >>  be made so that different size intakes can be tried?
 >>
 >>  Jerry

 >OK we will build the box with 4.75" by 13" opening and see
 >what we get in the way of airflow. There may be a way of cheating
 >when you do an actual 3D duct.
 >
 >Drawing later.
 >
 >
 >Paul Lamar

  For the test, what do  you think of a variable inlet opening , from
3 inches to 6 inches ?  Like a reverse cowl flap.     Jerry

If you are willing to build it I am willing to test it.

Paul Lamar

Here is the drawing Jerry. Made from 3/4 ply and dry wall screwed
together. Put 3/4 half round trim all all openings to smooth 
the air intake.

Paul Lamar
 
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