Electric Water Pump...
Melting Slicks
Joined: Aug 2005
Posts: 2,960
Likes: 112
From: New Braunfels TX
I like to take my cars to the drag strip. So with that being said I am able to cool down the car in between runs. So its + for me. But for just a regular daily driver I dont see the need unless you are after max HP. If you want a better flowing pump get an evans.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Can't comment on track performance but, even living in Vegas, the electric fans rarely cut in. Why modify a system that seems to work?
I'm always wary of such amazing HP claims just by running a tad cooler.
I'm always wary of such amazing HP claims just by running a tad cooler.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
I bought a used one for less than half price off another forum. Used it for 3 years, and sold it for more than I paid. Car ran cooler, and with all bolt-ons, with a H/mildC car, did 483 RWHP before the clutch gave up. I don't know how much, if any the EWP helped to achieve that, but it's a pretty good # for a mild build/conservative tune.
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Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
(1) No re-tuning is necessary
(2) If in the event you throw a belt it will not over heat (Biggest benefit by far)
(3) In the long run the extra RWHP is not bad at all especially if you are staying Naturally Aspirated
(4) They look cool too - your choice of color
I run one on mine and tore a belt and I still made it to work and home, I do run the Flip-Drive system on my Supercharger so my Power Steering and Alternator were still running -
BUT in the event you drop your belt you can safely make it off the freeway and to a area without overheating the motor and risking damage! you more than likely would even make it to home on the battery's power
Thanks,Matt
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Which essentially would free up HP that would be needed to turn the pump - Kinda like turning off the AC when it is on there is way less drag on the motor !
Thanks,Matt
Melting Slicks
Joined: Oct 2007
Posts: 2,798
Likes: 8
From: It's true money can't buy happiness, but it is more comfortable crying in a Corvette than on a bicyc
St. Jude Donor '13
How about dependability? I've read some things about short life span. Any truth to that? It's been the only reason I haven't bought one.
Safety Car
Joined: Jun 2009
Posts: 3,888
Likes: 2
From: Frederick, Maryland
Yea Matt, they basically said how since its less the motor has to turn! It will spin more freely than before. And their website says 3000+ hours life expectancy
Last edited by TriplBlk; Jul 30, 2011 at 01:04 AM.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
3,000 hours is a long time - that would equal 125 days driving straight for 24 hours and still it wouldn't fail - they suggest to send it in for a tune up -
Thanks,Matt
Le Mans Master
Joined: Sep 2007
Posts: 7,604
Likes: 8
From: Belleville Il
I have always been a LONG time subscriber to "HOT ROD" type magazines,, mainly Car Craft and Chevy High Performance. CC did test on various items related to cooling. The biggest gain was from converting to electric fans,,which we already have. On a mainly street driven car,,seems the under drive pulley would give best bang for the buck as it lowers cranking load of the pump AND alternator!! I can see the hp numbers from reduced cranking load,,but that is a lot of money for that gain. Now a car that sees a fair amount of strip or track time it would be worth the money,,street,,not too sure!!
Safety Car
Joined: Jun 2009
Posts: 3,888
Likes: 2
From: Frederick, Maryland
I think this pump,with a 25% underdrive pulley,my harrop, and a 25lb clutch and flywheel setup....will be one very fast revving V8.
Thats what I'm trying to accomplish at least. TSP even sells and underdrive pulley for the alternator
Le Mans Master
Joined: Jan 2001
Posts: 5,018
Likes: 508
From: Hilton NY
I had to have the motor bearings changed after 1200 hours and that cost $200 but at least they didn't fail on the road, they just got louder by the week. There is supposed to be less drag on the engine at high rpms compared to a mechanical pump but any energy the electrc pump uses comes from the alternator which of course is from the crankshaft. Horsepower TV did a dyno comparison between an electric and mechanical pump and showed gains with the electric. However, when they ran the electric pump it was powered by the building electricity since there was no alternator on the engine, hence the power gain!