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Date: Sun, 17 Apr 2005 15:55:35 -0500
Subject: Re: [FlyRotary] Re: Apex Seal Groove Wear and Air Filters was Re: [FlyRotary]...
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From: Jerry Hey <jerryhey@earthlink.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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On Sunday, April 17, 2005, at 03:41 PM, WRJJRS@aol.com wrote:

> In a message dated 4/17/2005 9:27:23 AM Pacific Standard Time,=20
> jerryhey@earthlink.net writes:
>
> Hi Leon.=A0 I am in complete agreement about the need for air =
filtration.
> =A0=A0 On one hand we have the need for filtered air and on the other =
we
> want the performance boost from ram air.=A0 If we supply ram air to a
> plenum and filter it before it enters the engine, is there a
> significant performance hit?=A0 If so could the ram effect be regained =
by
> using a larger filter, bigger scoop, and so on.=A0 I am building my
> intake right now and it will have filtered air with the option of
> switching to ram air at altitude.=A0 Do=A0 you think this is a good =
idea?=A0
> Certainly some dust exists even at 10,000 ft.=A0 =A0=A0 Jerry
>
> Jerry,
> =A0I'll be interested in Leon's take as well, but I wanted to kick in=20=

> here. Yes you can ram air a filtered plenum. If you look at any of the=20=

> newer motorcycles 600cc + you will find that all the sports and=20
> performance bikes use ram air, and the largest plemum box they can fit=20=

> in the frame practically.=A0 There is a noticeable power increase that =
I=20
> tested on the track. Run the biggest filter you can fit in for the=20
> lowest pressure drop. I like the K&N oiled filter element.
> Bill Jepson

Thanks Bill,   looks like I have some redesigning to do.  Jerry

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On Sunday, April 17, 2005, at 03:41 PM, WRJJRS@aol.com wrote:


<excerpt>In a message dated 4/17/2005 9:27:23 AM Pacific Standard
Time, jerryhey@earthlink.net writes:


<fontfamily><param>Arial</param>Hi Leon.=A0 I am in complete agreement
about the need for air filtration.

=A0=A0 On one hand we have the need for filtered air and on the other we

want the performance boost from ram air.=A0 If we supply ram air to a

plenum and filter it before it enters the engine, is there a

significant performance hit?=A0 If so could the ram effect be regained =
by

using a larger filter, bigger scoop, and so on.=A0 I am building my

intake right now and it will have filtered air with the option of

switching to ram air at altitude.=A0 Do=A0 you think this is a good =
idea?=A0

Certainly some dust exists even at 10,000 ft.=A0 =A0=A0 =
Jerry</fontfamily>


Jerry,

=A0I'll be interested in Leon's take as well, but I wanted to kick in
here. Yes you can ram air a filtered plenum. If you look at any of the
newer motorcycles 600cc + you will find that all the sports and
performance bikes use ram air, and the largest plemum box they can fit
in the frame practically.=A0 There is a noticeable power increase that I
tested on the track. Run the biggest filter you can fit in for the
lowest pressure drop. I like the K&N oiled filter element.

Bill Jepson

</excerpt>

Thanks Bill,   looks like I have some redesigning to do.  Jerry =20


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