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Rob Wolf:
The cabin heat valve is an unadulterated piece of s**t, as is the design
itself.
Look into the files on this site, and you will see several entries by me on
this subject dating back several years.
If you are bothered by dumping hot air overboard when you don't want it
coming into the cabin, just consider that your engine has given up several
horsepower to compress and then cool that air which is being wasted. This
means the wastegate is constantly trying to compensate for the compressed air
being dumped overboard through this opening--dollars being dumped overboard
in lost horsepower.
And, yes, the damn thing never quite shuts off completely, so in the summer
you are adding 200 plus heat to your already hot cabin.
The alternate design, which I paid $500 or so bucks to Lancair is also a
piece of crap, so don't waste your money--I will sell it to you cheap if you
want to try it. It was based on two concentric tubes--one fixed, and one
moveable. Trouble is, the two tubes have about a tenth of an inch difference
in diameters, making it leak more than the flapper valve type you have
described.
You would think that since 1991 and now, the firm would have made a heat
valve that functioned correctly. You would think that, wouldn't you....
Well, the firm is too busy designing new concepts, and its core business and
the problems that need to be solved in the core business still go unattended
and unfixed. So, don't bother them with questions about your heat
valve--they didn't have time to solve the problem when I brought it to their
attention in 1996, and they certainly won't address it now--they have new
concepts to address!
Just put the damned thing in or build one your self that doesn't waste engine
power by dumping unwanted heated air overboard.
David Jones, Pecatonica, Illinois
(Gees Lance, if you got irritated about the Nylaflow comments last week, will
you get irritated enough by this thread to make someone fix this problem, or
is it not a problem?)
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LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
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Please send your photos and drawings to marvkaye@olsusa.com.
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