Return-Path: Received: from [65.33.166.167] (account ) by logan.com (CommuniGate Pro WebUser 4.0) with HTTP id 1843581 for ; Wed, 23 Oct 2002 19:51:07 -0400 From: "Marvin Kaye" Subject: Re: [FlyRotary] Re: EWP Tech Data Take 1,000,002 To: flyrotary X-Mailer: CommuniGate Pro Web Mailer v.4.0 Date: Wed, 23 Oct 2002 19:51:07 -0400 Message-ID: In-Reply-To: <1035385828.3db6bbe4a1ed8@webmailapp2.cc.utexas.edu> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for msteitle@mail.utexas.edu: > It wouldn't surprise me at all that Mazda used the same pump on the > 13B and the 20B; and that the one data point that I have may be for the > 13B. I have a 1989 13b 6-port (n/a) and a 199? 20B-REW and have heard of some builders that interchange the front covers. I was considering doing this to get my thermostat housing lower. While it is true that the 13B cover will fit on the 20B engine, I did notice that the 20B water pump impeller is about 1/8" larger than the one on the 13B. I don't know if this is the same pump used on the 13B-REW, but it is definitely larger than the 1989 n/a 13B pump. So, it would stand to reason that the flow for the 20B pump would be greater than that for the 13B (n/a).