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Message
Doesn't pressure go down with an increase in velocity? Is
there any way
you could take readings with just a blower moving air through
with no
restrictions?
I don't follow Ernest. Are
you trying to suggest a way to see if the port on the TB changes with
airflow?
I would think you'd need
suction (some blowers do have that capability) to test this. At some
point, the suction would certainly be great enough to cause the pressure to go
down, but without a way to compare the velocity of the engine, with the blower
(sucker), I'm not sure it would tell me anything.
I know there are
tradeoffs, and sometimes higher velocity will work better than a slightly higher
pressure at a lower velocity. My intake joins the primary and secondary
close to the engine, and continues about 15 inches to the TB as a single runner
for each rotor. The ID of the runner and the TB is 1-5/8" (1.75" tubing),
which I believe is likely a bit too small for best power. If I
believed there was a lot to gain, I've got another Mazdatrix intake, and
2" bends to make another complete intake out
of. I also have another TB with about the right
size barrels for the 2" tubing, though if I were doing it over, I'd
probably take the runners to a plenum, with a single barrel TB on the inlet of
the plenum. At least I'd get a better MAP
reading.
For the record, I don't
really want to do any of this, unless there's significant power to be
gained.
Rusty
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