Mark,

 

How do the threads look on the O2 sensor?  Mine were boogered up when I
removed it.  I still don't know if it is due to different threads or
something else.  I used the bung from the original exhaust manifold, but the
O2 sensor that Tracy recommends.

 

Bill B  

  _____  From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Mark Steitle
Sent: Saturday, January 12, 2008 9:06 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: URL for HushPower

Bill, The cowl has had the "Dolly Pardon" mod.  So, no further cowl modifications
should be necessary.  Hopefully, this exhaust system will last.  I found one
crack that I hope was caused by not having a support out near the rear.  The
HP-2 will be supported for sure.  I haven't installed the bung for the O2
sensor yet, plan to do that tomorrow.  I need to pick up a new O2 sensor as
mine somehow got damaged.  Mark S.

On Jan 12, 2008 7:02 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:

Took me a minute to figure out what I was looking at, Mark, but what are you
going to do to reinstall the O2 sensor?  Looks like you will have to do a
little cowl mod as well?

 

I sure wish I lived a little closer to your welder.  :>)  That is a very
clean looking install.

 

Bill B  

  _____  From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Mark Steitle
Sent: Saturday, January 12, 2008 5:59 PM To: Rotary motors in aircraft

Subject: [FlyRotary] Re: URL for HushPower

For rotorheads that are contemplating using (also the mildly curious) the
Flowmaster HP-2 "resonator" muffler,

I installed the HP-2 today on my 20B and was able to do a run-up.  Bobby
Hughes and I both agree that the exhaust tone is much, much mellower with a
deeper tone.  My Lighspeed ANR headset had no problem cancelling out this
low-frequency exhaust tone.  While the overall sound level was still pretty
significant, the exhaust tone was much more pleasant to the ears.  The
ear-piercing, glass shattering, nails-on-the-chalkboard,
make-you-bleed-from-the-ears, exhaust tone is totally tamed.  The 3-blade
M/T prop is the primary noisemaker now.  The test took place between two
rows of hangars, so I feel that DB readings are not very realistic.  I'll
take those again out on the ramp and post the numbers.  If the HP-2 holds up
to the pounding of the rotary's exhaust, I'll be a very happy camper. Mark S.



On Jan 12, 2008 3:22 PM, Ed Anderson <eanderson@carolina.rr.com> wrote:

They are both used stock Rx-7 turbos.  one is the older model pre 89  and
the second is a later model 91 year.  They both appear to be in working
condition in no nicks on the blades and they spin.  I used compressed air to
spin the compressor wheels to they were really whizzing along.

 

One came with my 91 turbo block and the other was given to me.  

Ed

 

 

----- Original Message ----- From: Thomas Jakits <mailto:rotary.thjakits@gmail.com>  To: Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>  Sent: Saturday, January 12, 2008 3:46 PM

Subject: [FlyRotary] Re: URL for HushPower

 

Well,

then we just have to keep on looking for a "justification" for you/your
area/etc. :)

Just wait, I'll find something! :)

Thomas

How about: "..... I have two turbo sitting in my shop......."  ...are they new/used? What's the scoop on them?