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Bill,
My O2 sensor was difficult to remove, but the threads were ok. It did finally come out after a squirt of WD-40. The threads looked fine, but the sensor part was in bad shape. I may have damaged it myself previously when removing the baffle. BTW, the auger muffler (loose copy of the Spiral Flow) was holding up pretty well. There were two small places where the "auger" was fatigued, but all-in-all, it looks like it could be a viable alternative. Anyone thinking of trying this design should be advised to use nothing but 321SS or inconel.
Mark
On Jan 12, 2008 9:35 PM, Bill Bradburry < bbradburry@bellsouth.net> wrote:
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.
-----
Original Message -----
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?
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