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speckter(at)comcast.net
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 Posted: Thu Apr 22, 2010 1:27 pm Post subject: Ram Air |
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Here is the Manifold pressures I get at WOT at various altitudes. I have a
ram air intake and wondering if someone with a standard Van's cowl can give
me their # to compare.
900' 29" Take off roll
2500' 28"
4000' 26"
5000' 25"
6000' 24"
7500' 23"
8500' 23"
Manifold was reading 29.53 before startup.
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Tim Olson
Joined: 25 Jan 2007
Posts: 2879
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| Posted: Thu Apr 22, 2010 3:39 pm Post subject: Ram Air |
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That's really close to what I have with the standard cowl.
Tim
On Apr 22, 2010, at 4:22 PM, "gary" <speckter(at)comcast.net> wrote:
| Quote: |
Here is the Manifold pressures I get at WOT at various altitudes. I
have a
ram air intake and wondering if someone with a standard Van's cowl
can give
me their # to compare.
900' 29" Take off roll
2500' 28"
4000' 26"
5000' 25"
6000' 24"
7500' 23"
8500' 23"
Manifold was reading 29.53 before startup.
|
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jcumins(at)jcis.net
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| Posted: Thu Apr 22, 2010 3:56 pm Post subject: Ram Air |
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Those numbers are close to what I get from my Saratoga. With this
information I can not see the benefit of the additional cost of the new sump
and required additional hardware.
John Cumins
40864 Finishing emp Wings next
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Thu Apr 22, 2010 6:10 pm Post subject: Ram Air |
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A sump has little to do with manifold pressure, and everything to do
with intake air temperature and even distribution to cylinders. MP is
just one small piece of the overall equation.
On Thu, Apr 22, 2010 at 4:53 PM, John Cumins <jcumins(at)jcis.net> wrote:
[quote]
Those numbers are close to what I get from my Saratoga. With this
information I can not see the benefit of the additional cost of the new sump
and required additional hardware.
John Cumins
40864 Finishing emp Wings next
--
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
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