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f1rocket(at)telus.net
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 Posted: Sat Feb 17, 2007 7:42 pm Post subject: Exhaust BPA interference |
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Hi all,
Today I finally got around to installing my cold air induction and inverted
system. Of course I left the exhaust to last. I have been running a
Vettermann system, love it and people tell me it sounds great on the ground.
Problem is that it interferes with the BPA cold air induction piping.
Does anyone out there have the BPA system? If so what exhaust are you
running and where can I get my hands on one?
Regards,
Jeff
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Deems Davis
Joined: 09 Jan 2006
Posts: 925
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| Posted: Sat Feb 17, 2007 8:15 pm Post subject: Exhaust BPA interference |
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John Forsling makes tuned exhaust for BPE Cold air. He is recommended by
Allen Barrett. John actually spent time in BPE's shop and built several
exhausts and ran them on BPE's dyno to see what worked and what didn't.
John used to work work Vetterman before going off on his own. He's not
an e-mail/computer guy. e-mail me off line for his phone number. I have
his exhaust but have not installed it yet. It's ceramic coated inside
and out and priced competitively.
Deems Davis # 406
Finishing - ( A Misnomer ! )
http://deemsrv10.com/
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Sat Feb 17, 2007 9:13 pm Post subject: Exhaust BPA interference |
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John Forsling (Parker, CO) has Tuned Exhaust which is often ceramic
coated, specifically routed for the Barrett Cold Air System and the
Lycoming IO-540.
John Cox
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mneufeld(at)verizon.net
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| Posted: Sun Feb 18, 2007 2:16 am Post subject: Exhaust BPA interference |
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DOES A CERAMIC COAT ON BOTH INSIDE AND OUT MAKE THE PIPES HOTTER, AS IT MAY CONTAIN THE HEAT, AND THEREFORE PIPES CRACK OR FATIGUE SOONER?
mARK nEUFELD
From: Deems Davis <deemsdavis(at)cox.net>
Date: 2007/02/17 Sat PM 10:15:16 CST
To: rocket-list(at)matronics.com
Subject: Re: Exhaust BPA interference
John Forsling makes tuned exhaust for BPE Cold air. He is recommended by
Allen Barrett. John actually spent time in BPE's shop and built several
exhausts and ran them on BPE's dyno to see what worked and what didn't.
John used to work work Vetterman before going off on his own. He's not
an e-mail/computer guy. e-mail me off line for his phone number. I have
his exhaust but have not installed it yet. It's ceramic coated inside
and out and priced competitively.
Deems Davis # 406
Finishing - ( A Misnomer ! )
http://deemsrv10.com/
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Blairclan(at)bigpond.com
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| Posted: Sun Feb 18, 2007 2:41 am Post subject: Exhaust BPA interference |
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I understand that John Harmon's exhaust is designed to fit the BPA
setup. Hard to find a cheaper exhaust and you know that heaps of them
are in service!
Good Luck
Tony
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Deems Davis
Joined: 09 Jan 2006
Posts: 925
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| Posted: Sun Feb 18, 2007 7:14 am Post subject: Exhaust BPA interference |
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I have no 1st hand experience, as mine are not installed, however I have
heard from an EAA chapter member who had his coated after he had been
flying that his EGT's rose 75-100 degrees. I have heard anecdotal
stories both ways. i.e. that is shortens the life and that it extends
it..... ?
Deems Davis # 406
Finishing - ( A Misnomer ! )
http://deemsrv10.com/
Mark Neufeld - HR-2 wrote:
| Quote: |
DOES A CERAMIC COAT ON BOTH INSIDE AND OUT MAKE THE PIPES HOTTER, AS IT MAY CONTAIN THE HEAT, AND THEREFORE PIPES CRACK OR FATIGUE SOONER?
mARK nEUFELD
From: Deems Davis <deemsdavis(at)cox.net>
Date: 2007/02/17 Sat PM 10:15:16 CST
To: rocket-list(at)matronics.com
Subject: Re: Exhaust BPA interference
John Forsling makes tuned exhaust for BPE Cold air. He is recommended by
Allen Barrett. John actually spent time in BPE's shop and built several
exhausts and ran them on BPE's dyno to see what worked and what didn't.
John used to work work Vetterman before going off on his own. He's not
an e-mail/computer guy. e-mail me off line for his phone number. I have
his exhaust but have not installed it yet. It's ceramic coated inside
and out and priced competitively.
Deems Davis # 406
Finishing - ( A Misnomer ! )
http://deemsrv10.com/
>
>
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Sun Feb 18, 2007 11:48 am Post subject: Exhaust BPA interference |
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Ceramic coat lowers the transfer of heat rate through the walls over a
longer duration of time. Lower cowl temperatures, better fuel flow.
In Lancair's running the TSIO-550 it has been said that the ceramic
coating can flake off the inside and kills the turbo. I have heard no
first hand reports to confirm the perception. When only one side is
coated, the uneven cooling increases cracking at the flanges and welds.
That has been documented but not directly linked to the ceramic coatings
- it could have been questionable welds.
The benefits versus perceived risks need further research. The lower
cowl temperatures are a big plus.
John Cox
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