Greg;
Would be
interesting. Because of so many other variations, and lack of dyno data;
hp comparisons will be difficult. I’ll ‘weigh in’ with mine. See photo.
I probably have the
most compact intake manifold on a 20B, and it weighs 2.7 lbs. The TWM TB,
with fuel rail and injectors weighs 5.7 lbs. The fiberglass ‘airbox’ weighs
about 1.5 lbs. Total induction sys – 10 lbs.
Under the SS baffle is
an inconel manifold muffler (12.5 lbs) backed up by a secondary muffler (3.5
lbs); total exhaust system weight, with support bracket, 17.5 lbs. Starts
easily, no tuning issues. I run the EC2, but stage the primary; so start and
below 16.5” MAP runs on the injectors in the TB – gives smoother idle.
My design emphasis was
compact, lightweight. This NA configuration, with stock 9.0 rotors, was
run on the dyno, and produced the torque/hp curve (adjusted to standard day, sea
level) attached. My 2.17 redrive, and 3000 max rpm on the prop allows me
to go to 6500 rpm; although my WOT runs at altitude have never exceeded 6300.
Plenty of power for my
Velocity SE RG; which now has 150 hours in the air; with no glider time.
Al G