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Ed:<br>
Just a suggestion, but: When I was building full-size racing engines,
we were sometimes able to achieve a greater airflow/velocity by a
mismatch similar to what you have. We would take a $3000 pair of
aluminum heads as a starting point, and take the huge, round exhaust
ports and weld them in a kind of a tilted "D" shape, cutting the area
in half. This treatment upped the Horsepower and Torque, as measured on
a dynamometer. Also worked great out on the race course. (We weren't
racing dynamometers, back then!<span class="moz-smiley-s3"><span> ;-) </span></span>)<br>
My suggestion would be to Tach the engine before rejecting the part as
unacceptable. You might be pleasantly surprised. Or unpleasantly,
too, but you will have learned something.<br>
<br>
Bill Glaze<br>
<br>
Ed Alt wrote:<br>
<blockquote cite="midBAY24-DAV1Eqzfqix8K000114be@hotmail.com"
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<div><font face="Arial" size="2">I received a Hatori wrap-around
header for the OS 1.60 today and was surprised to see how small the
exhaust opening is. It's a small oval, apparently with less cross
sectional area than the pipe itself. I expected to see an opening to
match the OS exhaust port, which would then taper down. What's the
word on these? Is this ajust nother hunk of metal to add to my
extensive paperweight collection? BTW, I have a Mueller header on
order, but don't know if it will arrive in time for the weekend.</font></div>
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<div><font face="Arial" size="2">Ed</font></div>
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