Return-Path: Received: from fed1rmmtao12.cox.net ([68.230.241.27] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 3220010 for flyrotary@lancaironline.net; Fri, 07 May 2004 10:56:01 -0400 Received: from BigAl ([68.107.116.221]) by fed1rmmtao12.cox.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with ESMTP id <20040507145558.MRXW23256.fed1rmmtao12.cox.net@BigAl> for ; Fri, 7 May 2004 10:55:58 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: E-shaft pulley diameters Date: Fri, 7 May 2004 07:55:58 -0700 Message-ID: <001a01c43443$67f7c200$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001B_01C43408.BB98EA00" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_001B_01C43408.BB98EA00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 Subject: [FlyRotary] Re: E-shaft pulley diameters =20 Now this is beginning to make sense to me. The stock 20B e-shaft pulley = is=20 5.5", and the wp pulley is 4". I guess Mazda did this in the Cosmo = since=20 it was a luxury car (with an automatic trans) and not subject to as high = of=20 rpms as the RX-7's. Another probability is that the Cosmo's electrical=20 demands were greater, and therefore required the alternators to be spun=20 faster. I need to find (or build) a 4" multi-V e-shaft pulley, or = change=20 everything to a dual V-type so I can use undersize after-market pulleys. =20 Mark S. =20 I my opinion, using a speed reduction pulley on the alternator may make = some sense, because you can get plenty of charging at a lower speed; but I wouldn't slow down the water pump unless I knew I had excess cooling capacity in the system. =20 =20 Al ------=_NextPart_000_001B_01C43408.BB98EA00 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Subject: [FlyRotary] Re: E-shaft pulley diameters

Now this is beginning to make sense to me. The stock 20B e-shaft = pulley is

5.5", and the wp pulley is 4". I guess Mazda did this in the Cosmo = since

it was a luxury car (with an automatic trans) and not subject to as high of =

rpms as the RX-7's. Another probability is that the Cosmo's electrical =

demands were greater, and therefore required the alternators to be spun =

faster. I need to find (or build) a 4" multi-V e-shaft pulley, or change =

everything to a dual V-type so I can use undersize after-market = pulleys.

Mark S.

I my opinion, using a speed reduction pulley on the alternator may make some sense, because you can get plenty of charging = at a lower speed; but I wouldn’t slow down the water pump unless I knew = I had excess cooling capacity in the system.

<= /font>

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