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Jeff, you are right that opening the waste gate further would be the best
option, but by this this point our scrawny little waste gates are already
all the way open. There is not doubt that the HT-18 is not the best turbo
to use. But for a price of "free," and additional work to install of "none"
I just couldn't resist.
Dave Leonard
Pardon the abrupt de-lurking, but here's random thought for
consideration in
the current discussion on boost control.
Would it be possible to have the bleed air from a BOV actuate a "manual
override" of the wastegate, opening it up to alleviate the overboost
condition from the exhaust gas side.
Wouldn't this create a self-regulating feedback loop? You could
set the BOV
for your maximum desired boost to protect the engine. Since it
doesn't just
pop fully open but opens gradually against a spring, it would
also begin to
gradually override the wastegate setting to slow the turbine down, which
should mitigate the issues Ed described as problems with a BOV.
I certainly haven't thought this all the way through, and I'm not sure how
to go about building such an actuator, but I'm interested in comments from
the gallery.
Jeff Andre
Raleigh NC
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