X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-ma03.mx.aol.com ([64.12.206.41] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTP id 5081814 for flyrotary@lancaironline.net; Thu, 04 Aug 2011 10:35:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.206.41; envelope-from=Lehanover@aol.com Received: from mtaomg-db06.r1000.mx.aol.com (mtaomg-db06.r1000.mx.aol.com [172.29.51.204]) by imr-ma03.mx.aol.com (8.14.1/8.14.1) with ESMTP id p74EZFWw027161 for ; Thu, 4 Aug 2011 10:35:15 -0400 Received: from core-moa004b.r1000.mail.aol.com (core-moa004.r1000.mail.aol.com [172.29.233.13]) by mtaomg-db06.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id EB6B0E000087 for ; Thu, 4 Aug 2011 10:35:14 -0400 (EDT) From: Lehanover@aol.com Message-ID: Date: Thu, 4 Aug 2011 10:35:14 -0400 (EDT) Subject: Re: [FlyRotary] Water pump pulley departed in-flight To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_b0b3f.6286bc71.3b6c0822_boundary" X-Mailer: AOL 9.6 sub 5004 X-AOL-IP: 173.88.24.45 X-Originating-IP: [173.88.24.45] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:430492992:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d33cc4e3aae226e9d --part1_b0b3f.6286bc71.3b6c0822_boundary Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en Notice the offset of the pulley vice the flange centerline. The bolts are = =20 in shear for driving forces (very light) and in bending for belt tension = =20 (slightly higher load) so the little guys are working hard, and more bolts = is=20 a better answer. Racers run the single belt with the stock alternator=20 location, and just about 30% of the water pump pulley engaged with no prob= lems=20 at all, so loads are light. I use bolts in all 8 holes with Locktite. If= =20 your pumps have only 4 holes, add 4 more and tap. And actually measure bel= t=20 tension. There are stock two sheave water pump pulleys, where you run the= =20 alternator and, or, air conditioning with a two sheave crank pulley. And t= here=20 is a belt length that you can run the water pump from the Mazda=20 Competition pulley (smaller diameter) with no idler at all and perfect bel= t tension.=20 =20 No pulley failures since that first one in 1980, (with 4 bolts). =20 Lynn E. Hanover =20 =20 =20 =20 =20 In a message dated 8/4/2011 7:59:53 A.M. Paraguay Standard Time, =20 jwhaley@datacast.com writes: There are only four small bolts holding that thing in place =E2=80=A6 noti= ced in=20 Haynes pictures this morning that some have four studs and four bolts =E2= =80=A6=20 guess the studs are for adding a second pulley? =E2=80=93 but they would = also add=20 extra drive surface area. I think I put those bolts on with standard loct= ite=20 but am not 100% certain. Anyway now I=E2=80=99m wondering if my restricto= r plate,=20 loading the pump, may have contributed to more vibration or is this just= =20 coincidence =E2=80=A6 =20 Jeff --part1_b0b3f.6286bc71.3b6c0822_boundary Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
Notice the offset of the pulley vice the flange centerline. The bolts = are=20 in shear for driving forces (very light) and in bending for belt tension=20 (slightly higher load) so the little guys are working hard, and more bolts = is a=20 better answer. Racers run the single belt with the stock alternator locatio= n,=20 and just about 30% of the water pump pulley engaged with no problems at all= , so=20 loads are light. I use bolts in all 8 holes with Locktite. If your pumps ha= ve=20 only 4 holes, add 4 more and tap. And actually measure belt tension. There = are=20 stock two sheave water pump pulleys, where you run the alternator and, or, = air=20 conditioning with a two sheave crank pulley. And there is a belt length tha= t you=20 can run the water pump from the Mazda Competition pulley (smaller diameter)= with=20 no idler at all and perfect belt tension.
 
No pulley failures since that first one in 1980, (with 4 bolts).
 
Lynn E. Hanover   
 
 
 
In a message dated 8/4/2011 7:59:53 A.M. Paraguay Standard Time,=20 jwhaley@datacast.com writes:
=

There=20 are only four small bolts holding that thing in place =E2=80=A6 noticed i= n Haynes=20 pictures this morning that some have four studs and four bolts =E2=80=A6 = guess the=20 studs are for adding a second pulley?=20 =E2=80=93 but they would also add extra drive surface area.  I=20 think I put those bolts on with standard loctite but am not 100%=20 certain.  Anyway now I=E2=80=99m wondering if my restrictor plate, l= oading the=20 pump, may have contributed to more vibration or is this just coincidence= =20 =E2=80=A6=20

Jeff

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