X-Mozilla-Keys:                                                                                 
Marvin Kaye wrote:

 you wrote:

Turbonetics is still working on the specs Marv.
My requirements were 150 HP at 35,000 feet. I am not sure we are
going to make that. It will indeed be a TO-4 or some combination
of same. I will report as soon as possible.

Interesting... I've decided to take a much more pedestrian approach to
turbocharging as I have no interests in plying the flight levels.  Instead
I'm planning on getting 190hp (hopefully normally aspirated) at sea level,
and want to maintain that as full power to a critical altitude of 15k feet.
 The actual specs will be to get 190-200hp at 6300rpm with 32" MAP.  I want
to be able to maintain that power level to 15k and then live with the usual
MAP reduction that happens as a result of increased altitude.

This is a really conservative approach to boost, as it says I'll need about
1psi at SL, 7.5psi at altitude.  This should result in a bit smaller turbo
being required, and I suspect that I'll be able to use the same spec that
Paul Yaw used on Sven's 250hp 13B without any problem at all.  At any rate,
I'm anxious to hear what Turbonetics recommends for your operating
parameters... be sure to let us know about it as soon as you hear from them.

The HP at sea level will probably be whatever I set the automatic
pop off valve at. I intend for that to be controlled from
the cockpit. I also intend to use dual detonation sensors.
I am going to creep up on that very slowly indeed.

I intend to control MAP with a manually operated wastegate and will turn on
the overboost light at 32" and use an intake manifold pop-off only as an
ultimate MAP limiter, set at 34".  You know what Corky Bell says about
using a pop-off as a primary boost control, that's why I've chosen to use
one strictly as a limiter.

I have given much thought lately to the intake manifold and
I have decided to bond thin wall aluminum tubing together with
high temp epoxy. Sleaves where necessary at butt joints.

I'm planning on an AL flange and extensions and will bond and mechanically
attach an all carbon fiber manifold to it.  Should go a long way to keeping
that weight down.

   <Marv>

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