Eliminate The Tuned-pipe!
by Guy Sirois
With the advancement of electronic engine management, and the injection of the fuel charge after the inlet port has closed, it would be possible to ELIMINATE the old-fashioned tuned-pipe. An increase in displacement of 10-20% would compensate for the loss in top end HP.
However, the engines would gain in the following areas:
- No more tuned-pipe sound, that annoying ding ding ding that people with negative views towards motorsports hate so much.
- Much easier installation in small machines due to elimination of voluminous exhaust.
- Lighter weight.
- More linear powerband, maybe similar to 4-strokes.
My personal interest in this is in small airplanes applications, ultralights, where the tuned pipe has always been a source of noise, maintenance problems, and drag.
With Rotax already into this aviation market, it would not be a big step for them.