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Electric water pump?

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Old 03-09-2009, 07:32 PM
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Default Electric water pump?

Is this a good mod i dont see alot of ppl running one on a street car...if so which brand?
Old 03-09-2009, 08:43 PM
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Meziere EWP. I have had mine since 2006 and no issues at all. I liked it so much I re used it on my new 402. Engine runs cooler, and never even comes close to overheating no matter what the weather conditions are. EWP's are at max flow in stand still traffic, and with a proper fan re program you will never get over 195 even in 100 degree temps sitting in traffic with the a/c on. I know for a fact, I got caugt in those conditions and had no issues.
Old 03-09-2009, 08:45 PM
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EWP's are about the last bolton. A little expensive for what you get hp wise, but they do help increase fuel economy by reducing load on your engine. If you take your car on trips like I do, fuel economy when its good can be your best friend.
Old 03-09-2009, 09:09 PM
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how much hp did u get out of it
Old 03-09-2009, 09:12 PM
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Couldn't tell you for sure. It went on with afr 205 heads, and a ud pully. I did jump from 400 rwhp 380 rwtq (g5x3 cam only) to 457 rwhp and 421 rwtq. So the package picked up 57 rwhp and 41 rwtq. Best I can tell you bro.
Old 03-09-2009, 09:13 PM
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5-8hp max maybe less I hear sometimes it doesnt give anything.

But its on my TO-DO List for sure running cool = more power.
Old 03-09-2009, 09:16 PM
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I saw 34.5 mpg on one tank of gas too, believe it or not. Over 550 miles out of just over 16 gallons.
Old 03-09-2009, 09:18 PM
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Cruising at 70 mph in 6th gear, all freeway, no stopping at all. I was coming from LG Motorsports in 2006 and that was with the 346, not the new 402. I'll update you as to how the 402 does on the drive home.
Old 03-09-2009, 09:23 PM
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allngn you still didnt drive the car after 402ci ???

I would go crazy
lol

So you think the EWP Is good for daily drive??
Old 03-09-2009, 09:27 PM
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I fly down in a few weeks. Can't get a cheap ticket, and I am broke. I also can't get the days off from work. Be sure to check for a new thread about my first impressions and the drive home.

Sorry to the OP for the hijack.
Old 03-09-2009, 09:41 PM
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34.5 mpg holy ^&%*&*%
Old 03-10-2009, 12:57 AM
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I remember someone telling me not to install a EWP on a DD... don't remember the reasoning behind it though
Old 03-10-2009, 01:14 AM
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There are 2 types and one is for all out race and not made for daily driving. The Meziere pump I bought 5-6 yrs ago is for street cars and has done me alright through some hot summers here in Kansas.I don't know about anybody else but I have had no complaints and hp gain is from what I've read and been told is 8-12. As far as gas goes I don't know as I think the car sucks it down like my old '68 375 hp SS Chevelle.
Old 03-10-2009, 07:42 AM
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put one on my car in january.

car runs good and cool in florida heat. although it hasn't gotten REALLY warm yet.

did notice it takes longer to warm up when the temps are <60*, but that's expected. you could easily just put a smaller bypass hole in the thermostat, or run a warmer stat, something like a 180 instead of the 160 that i run.

only reason i went with the 160 was that i'll basically never run the car in less than about 50* weather, it just doesn't get THAT cold here in south florida. if i were to move someplace cooler, i'd swap the stat.

install was pretty easy, ls1howto has a good writeup, although the wiring directions are wrong.

do a search for my post on the install...put my tips and hints down.


i guess i don't see why you WOULDN'T run it in a DD street car.

only thing i can think of is the chance for failure. which is possible with any mechanical or electrical piece of equipment.
they are rated for something like 3000 hours or more...so if you figure you average 50miles per hour of driving...that's 150K miles. hell mechanical pumps don't last that long sometimes.
Old 03-11-2009, 07:26 PM
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I am interested in buying one of these but have some Qs...

I hav a lS1 but going to run a LS2 intake and i have read there are 2 diff. types of these EWP by Meziere one for the LS1 and another model for the LS2 for the 90mm TB mount to clear so im wondering can i use the LS2 model EWP on my LS1 w my LS2 intake?......

Last edited by 1999FirehawkLS1; 03-11-2009 at 08:04 PM.
Old 03-11-2009, 08:49 PM
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not sure about that

my Mez pump has no problems with my FAST 90 setup....




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