X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail07.syd.optusnet.com.au ([211.29.132.188] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTPS id 880085 for flyrotary@lancaironline.net; Tue, 13 Dec 2005 02:37:30 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.188; envelope-from=lendich@optusnet.com.au Received: from george (d58-105-151-76.dsl.nsw.optusnet.com.au [58.105.151.76]) by mail07.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id jBD7aa7L013849 for ; Tue, 13 Dec 2005 18:36:40 +1100 Message-ID: <001f01c5ffb7$f4cc87b0$4c97693a@george> From: "george lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Pport advice from the master Date: Tue, 13 Dec 2005 17:36:38 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001C_01C6000B.C5B39A00" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_001C_01C6000B.C5B39A00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Monty see comments below Who else but Lynn, Well, I just bought a 89-91 NA automatic motor. The plan is to Pport = it. Great 1.75 ID =20 Basically leave the exhaust alone. Leave the splitters or not? The = archives are a bit inconclusive here. In one post Lynn says to keep the = splitters. In another he says the Pport is very sensitive to exhaust = back pressure. I have some turbo housings I can take the insert out of = and put into the NA housings if need be.=20 I'd leave them alone Other info I have says the exhaust should be ported to Close 55 deg = ATDC vs 48 ATDC for stock while leaving the exhaust opening alone. ? Intake timing: IO 80 deg BTDC IC 60 deg ABDC 13 in intake length? Seems a bit short 31 in length header primaries 1 7/8-2 in dia - 2" 3 in collector into muffler 2 in dia after muffler. 7500 max power 5500-6500 cruise power running LOP. 2.17 drive and a 68 in prop. - 2.85 would be better for 7,000+ Speed-fast hopefully. If it sounds like this I won't be upset: http://mrec.rotary.net.nz/media/sounds/10app_idle.mp3 Who says they won't Idle? That is music to my ears!! Sewing machine be = damned! A proper sound should cause spontaneous incontinence amongst the = granolas. That an old 10A - things are better now! George ( down under) ------=_NextPart_000_001C_01C6000B.C5B39A00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Monty see=20 comments below

Who else but Lynn,

Well, I just bought a 89-91 NA = automatic motor.=20 The plan is to Pport it.

Great=20 1.75 ID

Basically leave the exhaust alone. = Leave the=20 splitters or not? The archives are a bit inconclusive here. In one = post Lynn=20 says to keep the splitters. In another he says the Pport is very = sensitive to=20 exhaust back pressure. I have some turbo housings I can take the = insert out of=20 and put into the NA housings if need be.

I'd leave = them=20 alone

Other info I have says the exhaust = should be=20 ported to Close 55 deg ATDC vs 48 ATDC for stock while leaving the = exhaust=20 opening alone.

?

Intake timing:

IO 80 deg BTDC

IC 60 deg ABDC

13 in intake length? Seems a bit short

31 in length header primaries 1 7/8-2 = in dia=20 - 2"

3 in collector into = muffler

2 in dia after muffler.

7500 max power

5500-6500 cruise power running = LOP.

2.17 drive and a 68 in prop. = - 2.85 would be better for = 7,000+

Speed-fast hopefully.

If it sounds like this I won't be=20 upset:

http://mre= c.rotary.net.nz/media/sounds/10app_idle.mp3

Who says they won't Idle? That is = music to my=20 ears!! Sewing machine be damned! A proper sound should cause = spontaneous incontinence amongst the granolas.

That an old = 10A - things=20 are better now!

George ( down = under)

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