Don, and interested parties---Below is the explanation on why "adding
extractors" seemed to lower the final power figures, as shown on PP. 9 &
10 in the Comp Prep Manual. Courtesy of the "Author"
Dick
The figure "C" on page 10 is with the stock exhaust manifold while "D"
on the same page is with the extractor system (Headers). Read the notes
in the little box of specs on that page. The ":D" is not referring to
another camshaft but to another TEST.You will note the date of the page
10 is several days before the page 9 tests. This means I started with
the stock exhaust to show the difference then neglected to note it on
the spec sheet on page 9 for the later tests.
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