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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif;color:windowtext'>I echo Bob’s comments. I’ve had the DWR high capacity pump for years.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif;color:windowtext'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif;color:#1F497D'>Bruce Steele<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif;color:#1F497D'>Brea, CA<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif;color:#1F497D'>1960 BN7<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif;color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='color:windowtext'>From:</span></b><span style='color:windowtext'> Healeys [mailto:healeys-bounces@autox.team.net] <b>On Behalf Of </b>Bob Spidell<br><b>Sent:</b> Tuesday, October 30, 2018 7:17 AM<br><b>To:</b> healeys@autox.team.net<br><b>Subject:</b> Re: [Healeys] oil pump<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p>I'll offer what I know/have heard*. I have the 'high capacity' type in my BJ8, which is what the DWR techs/sales people recommended for a road car. Older 6-cyl cars had a rotor type pump. They (the rotor type) are supposed to be more efficient--i.e. they pump more oil--at lower RPMs. At some point it was discovered, probably from service bay repairs, that this type of pump put an excessive shear load on the bevel gears on the cam that drive the pump, causing them to wear out. Later cars started getting the gear type pump, which is less efficient at lower RPMs but puts less of a load on the cam, and is probably less expensive to manufacture as well (esp. if the gears are the sintered iron variety). I think the bevel gears on the cams were re-engineered, IIRC they got an additional tooth to spread the load.<span style='font-size:12.0pt'><o:p></o:p></span></p><p>The Welch HC pump is the rotor type. I did a full engine rebuild and installed the DWR HC pump; I didn't notice any pressure change worth mentioning--I 'gained' 15 PSI at idle when I had my gauge overhauled--but the 'high capacity' I believe refers to volume rather than pressure (which, of course, is mostly dictated by engine speed). The 'standard type' pump is a gear type, hence it's more appropriate for high-RPM race engines as pump flow is proportional to RPM, and at 6K RPM or more you'll get plenty of oil with less load from the gear type.<o:p></o:p></p><p>I'm not positive, but if you look at the photos closely, you can see the 'gallery plug' on the top of the case. I suppose it allows inspection of the innards of the pump without having to break the case. I believe it's threaded so not likely to pop out. If you're getting a new pump you'll likely need a new drive shaft and, surprisingly, DWR sells it cheaper than our (US) vendors sell it at (I think they might import the DWR shaft).<o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>* apply appropriate grains of salt<br><br>Bob<o:p></o:p></p><div><p class=MsoNormal>On 10/30/2018 5:12 AM, <a href="mailto:simon.lachlan@alexarevel.plus.com">simon.lachlan@alexarevel.plus.com</a> wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal>Has anyone got the Denis Welch oil pump ENG672M? See:-<o:p></o:p></p><p class=MsoNormal><a href="https://www.bighealey.co.uk/performance-parts/austin-healey/engines/3000-bottom-end?page=3">https://www.bighealey.co.uk/performance-parts/austin-healey/engines/3000-bottom-end?page=3</a><o:p></o:p></p><h2 style='mso-margin-top-alt:6.0pt;margin-right:0in;margin-bottom:6.0pt;margin-left:0in;line-height:20.25pt'>Their text:- “<span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'>Heat treated castings for longer life and removable gallery plugs to be sure it is clean are advantages of both types of oil pumps we offer. We recommend the high capacity for all road engines using a standard type crank up to 6000 rpm and the standard pump for race engines, steel cranks or anything over 6000 rpm. Both are precision machined and assembled in-house to control the highest quality.<br></span><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'>- ENG672 is the standard type.</span><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'><br>- ENG672M is the high capacity pump.”</span><o:p></o:p></h2><p class=MsoNormal style='margin-bottom:12.75pt;line-height:14.4pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'>What are “removable gallery plugs”?</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.75pt;line-height:14.4pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'>Is it just me or is the above a bit counter-intuitive? “High capacity” for road cars and “standard” for race engines? Surely the highest capacity is needed where the engine is working hardest ie racing? </span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.75pt;line-height:14.4pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'>And don’t I remember that, with the standard BMC pumps, the older type is reckoned to be better than the newer type? Is this something similar to Denis Welch’s two pumps?</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.75pt;line-height:14.4pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'>Anyhow, if anyone’s got one…..what’s it like? Did the oil pressure improve at all?</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.75pt;line-height:14.4pt'><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#555555;mso-fareast-language:EN-GB'>I’m guessing that most people will have fitted one as part of a big rebuild thus they won’t have straightforward “before and after” comparisons. I’m thinking of fitting mine to my engine as part of a small winter project and hope I can squeeze a few more psi into the system. </span><o:p></o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Simon<o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><br><br><br><o:p></o:p></span></p><pre>_______________________________________________<o:p></o:p></pre><pre>Support Team.Net <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><o:p></o:p></pre><pre>Suggested annual donation $12.75<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Archive: <a href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive">http://autox.team.net/archive</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><a href="mailto:Healeys@autox.team.net">Healeys@autox.team.net</a><o:p></o:p></pre><pre><a href="http://autox.team.net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healeys</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/bspidell@comcast.net">http://autox.team.net/mailman/options/healeys/bspidell@comcast.net</a><o:p></o:p></pre><pre><o:p> </o:p></pre></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div></body></html>