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possums(at)bellsouth.net
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 Posted: Sun Mar 25, 2007 7:20 pm Post subject: Exhaust Ball Joint Conversion Kit - anyone using it? |
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At 10:17 PM 3/25/2007, you wrote:
| Quote: |
I've used them for 5 years now and have been very reliable. They do
take some worry out of springs breaking...
Kip
Firestar II
building a Waiex at the moment
--------
Kip
Firestar II (born September 2000)
Atlanta, GA
N111KX
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The brackets are stainless steel and will cut into the bolts after a
while. I think they finally replaced
the old AN bolts with stainless steel. I know we did it ourselves.
Seems like every time you
make something better, you find a new problem. I was only able to get
one on my plane because
of a clearance problem with the other joint.
But I like them.
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jbhart(at)onlyinternet.ne
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| Posted: Tue Mar 27, 2007 5:04 pm Post subject: Exhaust Ball Joint Conversion Kit - anyone using it? |
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At 03:01 PM 3/25/07 -0700, you wrote:
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CPS is selling this new "Exhaust Ball Joint Conversion Kit". It's about time for the muffler spring replacement. Anybody using this? If so, what's the verdict so far?
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John,
I have been using them for 139 hours on the Victor 1+. I had to cut the
original pipe and weld in a second ball joint. The single cylinder engine
power impulse is quite high so I discarded the original compression spring
and replaced them with small die springs ordered from McMaster-Carr. I
believe the trick is get enough joint compression so that it can move/rotate
due to thermal expansion, but not move due to power impulse. After 139 hours
the bolts show no wear.
The springs I used can be seen on the bottom of:
http://www.thirdshift.com/jack/firefly/firefly79a.html
The best photo of the setup is shown on the bottom of:
http://www.thirdshift.com/jack/firefly/firefly79.html
If I had it to do over, I would use Richard Pikes method. If one fabricated
the end through pieces for small diameter bolts, you would end up with much
lighter, stronger and very inexpensive clamping system than what I have.
Jack B. Hart FF004
Winchester, IN
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