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Tracy has (I think) shown
that airflow velocity apparently plays a major role in producing power.
His runners are 1.25 and 1.5" in dia - so clearly not oversized. This
creates higher air velocity in the runners which in turn can cram more air into
the chamber when the port opens (the momentum effect of the moving
air)
When I combined my primary and secondary
runner, I ensured that the total area of the single tube did not exceed the
combined area of both primary and secondary tubes in the attempt to keep the
airflow velocity the same as in the Mazda.
As always, thanks for
the comments Ed. The intake idea that I
stole <g> uses 1.75" tubes. This is certainly not larger than
the combination of Tracy's tubes, but that could be a problem in
itself, particularly because it's so long.
I've been looking at U-bend
aluminum tubing at Burns Stainless, and trying to figure the best way to make
this into a usable intake. Do you have a picture or drawing of the
inside of your molded chamber?
Also, can you (or anyone else)
refresh my memory on what's supposed to be the best simple, single
barrel TB? I'm thinking it was a mustang,
or Corvette part, and I even think there was someone trying to
sell one recently on the list. If you still have it, let me know. I
would want something light, simple, and with no injectors built in.
Basically, just a butterfly on a
flange.
Thanks,
Rusty (intake #3 scheming has
begun)
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