glang Posted December 13, 2017 Share Posted December 13, 2017 Does anyone know what difference there is between a standard six water pump and this uprated offering for TR2-4's? http://www.jamespaddock.co.uk/water-pump-and-pulley-uprated-tr24agwp202hdIt looks very similiar and is much cheaper than the specific hard-to-find uprated alloy item that is sometimes available.... Quote Link to comment Share on other sites More sharing options...
dazzer Posted December 13, 2017 Share Posted December 13, 2017 Hi GlangIts got a cast impeller with the bigger/more of the fins than the standard pump with four flat/shallow impellers.The more expensive uprated pump has an alloy impeller that has been machined with larger fins. I have this fitted at present but my engine over cools.I'm not saying its the pump but i'm now not so sure an uprated pump is necessary. I use my 2000 for competition and it only strays just above normal when ticking over for long periods. I don't have a crank fan fitted.When I get chance I'm swapping back to a standard pump to see how it performs.Dazzer Quote Link to comment Share on other sites More sharing options...
glang Posted December 13, 2017 Author Share Posted December 13, 2017 Thanks Dazzer, yes itll be interesting to see the result when you change your pump. With the TR unit I just wanted to know what stops it being used in sixes.... Quote Link to comment Share on other sites More sharing options...
69vitesse Posted December 16, 2017 Share Posted December 16, 2017 This is what you needhttp://water-pump-rebuilders.com/triumph-water-pumps.htmlThey have a European agent.Fwiw, the standard impeller is a known poor design that causes cavitaion. Quote Link to comment Share on other sites More sharing options...
glang Posted December 16, 2017 Author Share Posted December 16, 2017 Thanks, I cant see any prices though and I suspect they are a lot more than the TR item in my first post that JP supply at 77.50 + vat Quote Link to comment Share on other sites More sharing options...
69vitesse Posted December 16, 2017 Share Posted December 16, 2017 I got one with the better cast iron impeller from a place in Blackpool Markus put me on to. Didn’t cost much as I recal.FWIW, you can reduce cavitation by machining away the vanes around the factory impeller Boss, they just make the water froth, and setting the clearance carefully on the impeller shaft. It’s often rather random. Quote Link to comment Share on other sites More sharing options...
glang Posted December 16, 2017 Author Share Posted December 16, 2017 Thanks I'll have a look into suppliers around that area. Meanwhile Ive got a cunning plan with the standard pump which is to install an aluminium spacer ring in the pump housing to minimise the clearance between the impeller and intake. Fixing the spacer in place is not going to be easy and it could all end in tears but I think theres at least a 0.5mm gap at the moment which is reducing pump efficiency... Quote Link to comment Share on other sites More sharing options...
69vitesse Posted December 16, 2017 Share Posted December 16, 2017 Yiu can see the pump here.Sorry , link no longer available Quote Link to comment Share on other sites More sharing options...
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