<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Chris,<div class=""><br class=""><div class="">It might be instructive to measure input/output comparison temperatures over a range of, say, 160˚F to 212˚F. Everything I’ve read so far says that a 25˚F drop between inlet and outlet is pretty typical. If it’s dropping more than that, I would think that the coolant is spending more time in the radiator due to slow flow. I have read that the idea that the water is circulating too fast for an adequate temperature drop in the radiator has been discredited but I couldn’t find the source of that statement. It does make sense to me, however, that if the water flow is completely unrestricted some areas will be cooled more effectively than others as friction loss drags down flow in smaller passages in the engine as flow increases to the larger passages.</div><div class=""><br class=""></div><div class="">Checking the temperature at various places on the block and intake manifold could yield some useful information too.</div><div class=""><br class=""></div><div class="">I just remembered something as I was typing this. Some serpentine belt arrangements cause the water pump to turn the other direction on the BOP V8. there are various types of impeller, some with straight vanes, some with curved ones, and I’ve seen both “directions” of curved vanes — I wonder if your car ended up with one that is meant to turn the other way.</div><div class=""><br class=""></div><div class=""><div class="">
<div class="">Duncan Charlton</div><div class="">Elgin, Texas USA</div><div class=""><br class=""></div><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On Jul 9, 2016, at 7:11 AM, MadMarx <<a href="mailto:tr4racing@googlemail.com" class="">tr4racing@googlemail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">Hi Duncan,<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">To answer your questions:<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: 'Times New Roman', serif; text-indent: -18pt;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="">1-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';" class=""> <span class="Apple-converted-space"> </span></span></span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">I measure about the same what is measured at the head outlet. The gauge is mechanical and I’ve put the probe in boiling water and had read 210F. I think this is okay with being 200 meters above see level.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: 'Times New Roman', serif; text-indent: -18pt;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="">2-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';" class=""> <span class="Apple-converted-space"> </span></span></span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">The radiator core is new and came in at year 2014. I’ve also measured over the whole core temperatures and they are very even. It is also clean from outside.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: 'Times New Roman', serif; text-indent: -18pt;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="">3-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';" class=""> <span class="Apple-converted-space"> </span></span></span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">I do always my best to remove air.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: 'Times New Roman', serif; text-indent: -18pt;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="">4-<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';" class=""> <span class="Apple-converted-space"> </span></span></span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">With the fan blowing the temperature is creeping up more and more. Fan blows in the right direction<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">The impeller of the waterpump has a metal plate so it should be independent of any distance to the housing.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">The car had these temperatures already when I drove it at Road America. So this is not a new thing on the car, I just want to cure it.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">Chri<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><a name="_MailEndCompose" class=""><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></span></a></div><span class=""></span><div class=""><div style="border-style: solid none none; border-top-color: rgb(225, 225, 225); border-top-width: 1pt; padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><b class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class="">Von:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class="Apple-converted-space"> </span>Duncan Charlton [<a href="mailto:duncan.charlton54@gmail.com" class="">mailto:duncan.charlton54@gmail.com</a>]<span class="Apple-converted-space"> </span><br class=""><b class="">Gesendet:</b><span class="Apple-converted-space"> </span>Samstag, 9. Juli 2016 13:51<br class=""><b class="">An:</b><span class="Apple-converted-space"> </span>MadMarx <<a href="mailto:tr4racing@googlemail.com" class="">tr4racing@googlemail.com</a>><br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>FOT List <<a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a>><br class=""><b class="">Betreff:</b><span class="Apple-converted-space"> </span>Re: [Fot] TR8 Water temperature<o:p class=""></o:p></span></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Chris,<o:p class=""></o:p></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">212F at idle? That’s interesting. I’ll start with the usual questions: <o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">1) What is the temperature you recorded at the radiator inlet? (Having observed this, I assume you have already confirmed that the gauge is reading correctly.)<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">2) Is the radiator clean, inside and out?<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">3) Have you confirmed that there is not an air bubble trapped in the system?<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">4) Temperature at idle remains this high even with the cooling fan blowing? If so, is the fan blowing the right direction?<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I don’t know whether the following applies to the Rover motor you’ve got, but some Morgan owners with Triumph motors have found that the impeller of their new water pump is improperly placed on its shaft so that there is a large gap between the impeller and the housing, causing it to be very inefficient. One guy measured 0.075” end clearance, which he was able to reduce to 0.015” by use of a spacer.<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""> <o:p class=""></o:p></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Duncan Charlton<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Elgin, Texas USA<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div><div class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class="" type="cite"><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">On Jul 7, 2016, at 12:20 PM, MadMarx <<a href="mailto:tr4racing@googlemail.com" style="color: purple; text-decoration: underline;" class="">tr4racing@googlemail.com</a>> wrote:<o:p class=""></o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 10pt; font-family: Verdana, sans-serif; color: rgb(31, 73, 125);" class="">Hi guys,</span><o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 10pt; font-family: Verdana, sans-serif; color: rgb(31, 73, 125);" class=""> </span><o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span lang="EN-US" style="font-size: 10pt; font-family: Verdana, sans-serif; color: rgb(31, 73, 125);" class="">My TR8 is running way too hot about 212F at full speed and at idle the temps are getting that high also. I have no idea to get them down.<br class="">Radiator core is 68x48cm x 5 cm. I suppose that should be enough. I've experiment with different restrictor plates with no change. Changing pump speed didn't help either. The difference between radiator in and outlet is 10°C (50F). Not enough I would say. Maybe making the pump more slower? It was running on a ratio of 0.8 slower than crank, currently 1:1 speed.<span class="apple-converted-space"> </span></span><span style="font-size: 10pt; font-family: Verdana, sans-serif; color: rgb(31, 73, 125);" class="">Any ideas? 10 Liters are circulating.</span><o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 10pt; font-family: Verdana, sans-serif; color: rgb(31, 73, 125);" class=""> </span><o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 10pt; font-family: Verdana, sans-serif; color: rgb(31, 73, 125);" class="">Cheers</span><o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 10pt; font-family: Verdana, sans-serif; color: rgb(31, 73, 125);" class="">Chris</span><o:p class=""></o:p></div></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class="">_______________________________________________<br class=""></span><a href="mailto:fot@autox.team.net" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif; color: purple;" class="">fot@autox.team.net</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class=""><br class=""></span><a href="http://www.fot-racing.com/" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif; color: purple;" class="">http://www.fot-racing.com</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class=""><br class="">Donate:<span class="apple-converted-space"> </span></span><a href="http://www.team.net/donate.html" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif; color: purple;" class="">http://www.team.net/donate.html</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class="">Archive:<span class="apple-converted-space"> </span></span><a href="http://www.team.net/archive" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif; color: purple;" class="">http://www.team.net/archive</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class="">Forums:<span class="apple-converted-space"> </span></span><a href="http://www.team.net/forums" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif; color: purple;" class="">http://www.team.net/forums</span></a><span style="font-size: 9pt; font-family: Helvetica, sans-serif;" class=""><br class="">Unsubscribe/Manage:<span class="apple-converted-space"> </span></span><a href="http://autox.team.net/mailman/options/fot/duncan.charlton54@gmail.com" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica, sans-serif; color: purple;" class="">http://autox.team.net/mailman/options/fot/duncan.charlton54@gmail.com</span></a></div></div></blockquote></div></div></div></div></div></blockquote></div><br class=""></div></div></body></html>