X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 11 May 2009 20:23:53 -0400 Message-ID: X-Original-Return-Path: Received: from [70.62.14.124] (HELO server1.USTEK) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3638460 for lml@lancaironline.net; Mon, 11 May 2009 07:28:19 -0400 Received-SPF: none receiver=logan.com; client-ip=70.62.14.124; envelope-from=r.simon@ustek.com Subject: RE: Performance Engines - Creating More Pain X-Original-Date: Mon, 11 May 2009 07:31:34 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C9D22C.0BD44728" X-Original-Message-ID: Content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft Exchange V6.5 In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Performance Engines - Creating More Pain Thread-Index: AcnSLAkhq0MzYIwQTzGVedZWxa5fuQ== From: "Lancair" X-Original-Sender: "Robert Simon" X-Original-To: "Frederick Moreno" , This is a multi-part message in MIME format. ------_=_NextPart_001_01C9D22C.0BD44728 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Cause: the forged PE pistons have lower silicon content than cast pistons (from ECI, for example) and have a higher expansion coefficient than cast pistons. When installed with insufficient piston to bore clearance, the forged pistons rub which also scores the cylinders. . . . Should PE have used additional bore clearance for the high compression pistons? Of course. Somebody screwed up and used the wrong clearance spec. =20 I believe that 100% of Performance engines are shipped with forged pistons. That is one of their trademarks of their build (that and late delivery). So I find it strange that they used the wrong clearance. All their engines should be sized for forged pistons and there should have been no choice to be made during assembly. I wonder if they jobbed out this work to another shop. =20 =20 Robert M. Simon ES-P N301ES =20 =20 ------_=_NextPart_001_01C9D22C.0BD44728 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 <snip>=20  Cause: the forged PE pistons have lower silicon = content than=20 cast pistons (from ECI, for example) and have a higher expansion = coefficient=20 than cast pistons.  When installed with insufficient piston to bore = clearance, the forged pistons rub which also scores the cylinders.  . . .=20 Should PE have = used=20 additional bore clearance for the high compression pistons?  Of=20 course.  Somebody screwed up and used the wrong clearance=20 spec.   <snip>
 
I believe that 100% of Performance engines are shipped = with forged=20 pistons.  That is one of their trademarks of their build (that and = late=20 delivery).  So I find it strange that they used the wrong = clearance. =20 All their engines should be sized for forged pistons and there should = have been=20 no choice to be made during assembly.  I wonder if they jobbed = out=20 this work to another = shop.  
 
Robert M. Simon
ES-P N301ES
 
 
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