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