In a message dated 1/7/2004 6:36:54 PM Central Standard Time,
MikeJ@B9Creations.com writes:

<< Excuse my extreme rotary newness, but what are "parallel cores"?
 Thanks,
 MikeJ
  >>
These people are using air conditioning evaporator cores from automobile air
conditioning as water radiators. It takes two to get the job done. Some people
use a "Y" arrangement out from the engine to connect the two cores in
parallel and another "Y" to get water back into the engine. Others connect both cores
in series, thus eliminating the extra fittings. Both systems seem to work OK.

Lynn E. Hanover