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Al,
In the attached picture, the 20B impeller (right) is .170" larger
diameter than the 13B (left). Note that the 13B in the picture is
from an '89 n/a engine. Not sure if 3rd gen or Cosmo impellers are
the same size as the 20B. No idea how much more coolant the 20B
pump will flow than the smaller 13B pump. Just a data point in case
you have cooling issues.
Mark
Mark;
Yes, I have a 13B pump
housing; I m not sure what impeller. All I know is Dave Atkins
billed it as high performance . The pump pulley and the e-shaft
pulley are the same size, which I believe is 11 - 12 cm. I can t
confirm right now because I d have to take the cowl off to check.
Al
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