Dave Before going down such a route consider some (debatably) easier options:
1 Is the car chipped? This will richen the mixture slightly and help it run cooler. Is the air filter clean? Are you sure it is allowing the engine to breathe sufficiently? Try a K & N type? Are you sure there are no air leaks allowing the engine to lean off? 2 Is the alloy radiator larger than the original , or the same size? My Mulfab one is deeper by several cms. 3 Are you sure you don't have any air locks in the cooling sytem? 4 Have you changed the expansion tank cap recently, they can age and allow the water to boil at a lower temperature. 5 Have you backflushed the system recently , crud in the bottom of the rad can affect water flows a lot. 6 Is the number plate or anything else impeding the air flow into the radiator core? 7 Are you positive that you don't have any head gasket issues? Regards Andy >________________________________ > From: Dave Ager <[email protected]> >To: mogtalk2 <[email protected]> >Sent: Tuesday, 17 July 2012, 20:43 >Subject: [mogtalk2] Plus eight water pump. Technical > >Hi All. >My plus eight has the normal problem of getting hot when stationary. >I have opened the rear of the bonnet 40mm and fitted an aluminium rad. >Still have a slight issue. >Before fitting an oil cooler a guy at LeMans suggested fitting a smaller >pulley to the water pump to draw more water through the system. >With a standard 97 3.9 hotwire I believe I may have room on the pump to try >this, engine doesn't rev as high as a worked 4.6. > >However before I start machining a billet I would like to check the pump >characteristics to ensure I don't end up with cavitation in the pump. >Currently toying with a 10-15 % speed increase. > >Now the point . Can anyone provide a spec for the water pump, preferably with >characteristic curves. > >Thanks in advance. >Dave >97 plus 8 > > > > >------------------------------------------- >View posts on The Mail Archive >http://www.mail-archive.com/[email protected]/ >[http://www.mail-archive.com/[email protected]/] > >Modify Your Subscription: https://www.listbox.com/member/?&; >Powered by Listbox: http://www.listbox.com > > > ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?member_id=22459785&id_secret=22459785-4a39ddf8 Powered by Listbox: http://www.listbox.com
