Espen's Reed Valves

[Bruce Plecan]

----- Original Message -----
From: Espen Hilde <mwichstr at online.no>
Subject: Re: Espen's Reed Valves

Remember how expensive internal engine parts are.   If the reeds brake they
can raise hell inside an engine.
  They are good for just a very limited range, before they "peg" open....
To get enough reed area for a "big" engine to breath thru would be a huge
reed cage.
Bruce

> I want to use a reed cage from a outboard two stroke engine or crosser
> bike.
> With carbon fiber reed pedals for minimum restriction,or boyesen
> reeds.There is  little difference in max output from two stroke with
> reedvalve and rotary valve.By using a hotter cam than you would do without
> reeds,
> I think you can have more hp at max and gobs of torque down low.I would be
> difficult to mount the reeds as close to the valves as possible, I think a
> 4 valver is most suited because of the two inlet runners making a easy
> transition to the wide reed cage. Using a rotary file and file the two
> runners
> together and mount the reed cage as the start of the intakemanifold.
> Espen.
> > Dave:
> >     I'm not sure if you are speaking of the many "hit & Miss" type
> > engines which used an ordinary valve with a light spring which was
> > sucked open during the intake stroke..... I presume this is what you
> > mean by "reed valve".....or was there some other form of reed valve
> > used?  A friend of mine has a number of these engines still in use.
> > H.W.
> > -----Original Message-----
> > From: Dave Williams <dave.williams at chaos.lrk.ar.us>
> > To: diy_efi at efi332.eng.ohio-state.edu
> > <diy_efi at efi332.eng.ohio-state.edu>
> > Date: Sunday, May 02, 1999 10:24 PM
> > Subject: Espen's Reed Valves
> > -> cam to get variable duration and the reed valves would take care of
> > -> the blowback problem at the low end......    At least a first
> > thought
> > Alfa Romeo built some engines like that 20 years ago.  There were also
> > some stationary engines using reed valves at the beginning of the
> > century.
> > The Alfa setup let them run a long duration cam without confusing the
> > carburetor with reversion pulses or contaminating one cylinder's
> > intake
> > charge with another's exhaust coming through on overlap.  It looked
> > like
> > a fine idea to me, and I have no idea why they dropped it.