RE: Which engine is faster in a Magnum/Dust, Jett 50 or West 50??
Evan kinda hit it on the head there. Its all in the setup and how you fly the plane.
The West 50 with a full pipe on it ----- pleanty fast ------ tune pipe for 20K+ with an 8x8 prop.
Good engine, reliable - runs well - lots of power. Pretty good value on the combo deal.
Jett 50/60LX with SS jett-stream muffler ----- pleanty fast -- tuned to run 18K rpm and higher (9x8, 8.75x9W, 8.5x8.25)
-- comes with the muffler, no tuning, no coupler -- if there is any advantage i see, it is this aspect.
Jett with a full size pipe -- can do a little bit better than the muffler -- and pipe can be shortened to run over 20K rpm with smaller prop if desired. Cost more for the big pipe and header.
Which is faster ? Idunno... both setups are pretty quick - probably a dead heat on level flight speed in the Magnum. Kinda comes down to which powerplant you want, and what you may wish to do with the engine in the future.