X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from frontend1.cwpanama.net ([201.225.225.167] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1000489 for flyrotary@lancaironline.net; Mon, 13 Jun 2005 13:57:21 -0400 Received-SPF: none receiver=logan.com; client-ip=201.225.225.167; envelope-from=rijakits@cwpanama.net Received: from [201.224.93.110] (HELO usuarioq3efog0) by frontend1.cwpanama.net (CommuniGate Pro SMTP 4.2.1) with SMTP id 43669056 for flyrotary@lancaironline.net; Mon, 13 Jun 2005 13:12:19 -0500 Message-ID: <004001c57041$3af691b0$6e5de0c9@usuarioq3efog0> From: "rijakits" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: normalized supercharger? Date: Mon, 13 Jun 2005 12:56:30 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003C_01C57017.51D8F960" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 This is a multi-part message in MIME format. ------=_NextPart_000_003C_01C57017.51D8F960 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit MessageJonathan, I never had either charger in my hands, but the system seems to be about the same. Eaton having bigger rotors, but it also must keep tolerances very accurately or you get the same "failure mode" you wanted to avoid. Do you have any idea about weights between these two? Thomas ----- Original Message ----- From: Bobby J. Hughes To: Rotary motors in aircraft Sent: Monday, June 13, 2005 12:00 PM Subject: [FlyRotary] Re: normalized supercharger? Jonathan, Power (boost PSI) really does matter for normalization. At 8000 ft air pressure is at 22.22 hg. It will talk about 3.75 psi of boost to recover to 29.92. But you are correct. No need to work the spin the SS any faster than necessary. Bobby ------------------------------------------------------------------------------ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jonathan Crawford Sent: Monday, June 13, 2005 11:29 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: normalized supercharger? I'm not sure power really matters in the configuration we are discussing... if you were going to boost, then yes it might be important, but in normalizing situations having extra power is just wasted, cause you are only maintaining ~30" manifold. The Whipple superchargers are also more fragile, they require a very solid mounting due to the internal clearances of the blower, if you do not have a good mounting the case will flex and the screws will decide to become one with the housing, which is one failure mode I do not want to even consider since it throws bits of the blower into the engine. Jonathan ------------------------------------------------------------------------------ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of rijakits Sent: Monday, June 13, 2005 9:49 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: normalized supercharger? Bobby, before you pluck down the money for the Eaton, check out the Whipple/KenneBell/Lysholm. In the last 5.0-Mustang mag (sometimes I fall back to old habits, sorry.... :) ), there was an advertisement for a KenneBell setup as a direct replacement for the Eaton ( there was some factory offer with a Eaton charger, probably from the Motorsports department...), which claims more power/efficiency with the same setup (bolt in...) I know that the Whipple is pricier than the Eaton, but not that much! Thomas J ------=_NextPart_000_003C_01C57017.51D8F960 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Jonathan,
I never had either charger in my hands, but the = system=20 seems to be about the same.
Eaton having bigger rotors, but it also must = keep=20 tolerances very accurately or you get the same "failure mode" you wanted = to=20 avoid.
Do you have any idea about weights between these = two?
 
Thomas
----- Original Message -----
From:=20 Bobby J. = Hughes=20
Sent: Monday, June 13, 2005 = 12:00=20 PM
Subject: [FlyRotary] Re: = normalized=20 supercharger?

Jonathan,
 
Power (boost PSI) really does matter for = normalization.=20 At 8000 ft air pressure is at 22.22 hg. It will talk about 3.75 = psi of=20 boost to recover to 29.92. But you are correct. No need to work the = spin the=20 SS any faster than necessary.
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Jonathan=20 Crawford
Sent: Monday, June 13, 2005 11:29 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: normalized = supercharger?=20

I'm not sure power really matters in the = configuration we=20 are discussing... if you were going to boost, then yes it might be = important,=20 but in normalizing situations having extra power is just wasted, cause = you are=20 only maintaining ~30" manifold. The Whipple superchargers are also = more=20 fragile, they require a very solid mounting due to the internal = clearances of=20 the blower, if you do not have a good mounting the case will flex and = the=20 screws will decide to become one with the housing, which is one = failure mode I=20 do not want to even consider since it throws bits of the blower into = the=20 engine.
 
Jonathan
From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of=20 rijakits
Sent: Monday, June 13, 2005 9:49 = AM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re: = normalized=20 supercharger?

Bobby,
before you pluck down the money for the Eaton, = check out=20 the Whipple/KenneBell/Lysholm.
In the last 5.0-Mustang mag (sometimes I fall = back to=20 old habits, sorry....  :) ), there was an advertisement for a = KenneBell=20 setup as a direct replacement for the Eaton ( there was some factory = offer=20 with a Eaton charger, probably from the Motorsports department...), = which=20 claims more power/efficiency with the same setup (bolt = in...)
I know that the Whipple is pricier than the = Eaton, but=20 not that much!
 
Thomas = J
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