I thought the Davies Craig research is persuasive on the benefits of an electric pump, but not for me , as I do not want a failure in the back of beyond. In the old RRC case you would still have to have the water pump casing without impeller which still leaves you vulnerable to seal failure
Its by all these tweaks that the car makers are getting their fuel consumption down, like BMW with alternator only working on overrun, electric water pump, electric fans, valve manipulation instead of throttle, direct injection, plastic intake manifolds lots of aluminium bits etc etc.
But I am more impressed by the Japanese who seem to design in economy rather than add bits. Eg a 2001 Barina 1.4 has electronic throttle, EGR, etc both of which give trouble which costs a fortune to diagnose, grafted onto an old engine.
My 2006 jazz has a good old accelerator cable on a new engine including Vtec to achieve good power and economy designed in . It also has EGR I must admit but they do not seem to give trouble.
So I am philosophically for the new bits but in practical terms of grafting onto an old car, against.
Regards Philip A
