e water pump worth it??
Originally Posted by Sprayed96ss
i had mine on my car for about 4 years and about 40k miles and its still working.... its a CSI which is now CSR
-Bryan
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Teching In
Joined: Dec 2006
Posts: 7
Likes: 0
From: Indiana
I have had mine for 4 almost 5 years now it is a CSI never had any issues with it. If it stops working I would know now. Still the warning system would be a good idea. Before I had my Del-Teq I had the water pump and MSD on a relay so if the water pump went out or blew a fuse it would shut off the MSD. The ultimate warning hey why won't the engine run?? 
i'd say they are definately worth it, not only do they more effectively circulate coolant through the motor by remaining at a certain rate by not relying on the motors speed to circulate the coolant via the cam, they also take that load off of the cam and allow the motor to work more efficiently as well increasing horsepower and allowing the motor to rev faster with less effort because of that restriction that is no longer there because of the water pump now being electric. same reason a lot of the serious drag racers delete the air conditioning/power steering/power brakes and so on, they do it for weigh reduction as well tho.
Launching!
Joined: Feb 2006
Posts: 206
Likes: 0
Originally Posted by Formula350
I read in another thread that the factory pump flows more...
I will say that with the EWP my car runs about 10 degrees hotter than it did with the factory pump (does anyone else have this problem?), but did make a difference on times.
I'm not sure I understand why an electric pump would load the engine less. The electricity comes from the alternator, which will load the engine approximately the same amount as the mechanical pump. I would expect if both pumps were turning at the same rate, the electric would actually be less efficient because there will be losses due to the mechanical to electric conversion and vice versa. To me it only makes sense if the electric pump turns slower, especially at high rpm where you're wanting power. Is this where the gains really are, and if so, are there any concerns about not circulating as much coolant at high rpm?
Originally Posted by Camaro_freak
I'm not sure I understand why an electric pump would load the engine less.
Originally Posted by Mortify
The Alt is producing the same load all the time, all it would do is take some of the volts generated and use them... where as the mechanical pump is a physical stress that takes more power to move than an EWP
Maybe the hamster wheel statement wasn't the best, but I was trying to illustrate that it takes more mechanical energy to generate a given amount of electrical energy due to conversion losses. The same applies to an electric water pump. Whether it's driven off the alternator or the camshaft, it's powered by the engine, and I expect larger parasitic losses due to power conversion loss and electrical resistance. The only benefit that makes sense is if the electric pump is turning slower at high rpm than a mechanical pump.
Originally Posted by Camaro_freak
Maybe the hamster wheel statement wasn't the best, but I was trying to illustrate that it takes more mechanical energy to generate a given amount of electrical energy due to conversion losses. The same applies to an electric water pump. Whether it's driven off the alternator or the camshaft, it's powered by the engine, and I expect larger parasitic losses due to power conversion loss and electrical resistance. The only benefit that makes sense is if the electric pump is turning slower at high rpm than a mechanical pump.
pump isnt going to "tell the engine turn the alternator faster."