High flow water pump

[Pops]

Hey guys what are the water pump options. I remember seeing a thread on a bolt on one that you guys gave a good report on. Who made it and the model number.

[magindat]

Hey guys what are the water pump options. I remember seeing a thread on a bolt on one that you guys gave a good report on. Who made it and the model number.

John, It's a Stewart EMP. I absolutely love mine. Better flow, cooler temps, less parasitic HP draw, no chance of electric failure.

http://www.mercurymarauder.net/forums/showthread.php?t=35360&highlight=emp+stewart

EMP-STE50046S for 4V Engines

I got mine from summit.

[Pops]

Thanks Rich. My car is under full reconstruction now and that was one of the last issues. I bet that I will have about 25 more decisions to make before this is done!

[magindat]

But those are FUN decisions!!!

[arejayesss]

John, It's a Stewart EMP. I absolutely love mine. Better flow, cooler temps, less parasitic HP draw, no chance of electric failure.

http://www.mercurymarauder.net/forums/showthread.php?t=35360&highlight=emp+stewart

EMP-STE50046S for 4V Engines

I got mine from summit.

Yeah, what he said. I got the same!

[RR|Suki]

is there any kind of evidence about the flow difference on 4v motors?

[magindat]

Only proof I have is an 8 degree cooler average as noted on Aeroforce gauges on back to back very similar days.
Measurements were taken on a fixed-length highway trip and on a 30 minute driveway idle before and after.
Biggest difference was at idle - nearly 10 degrees cooler. Highway run was about 6 degrees cooler.

[arejayesss]

http://www.mercurymarauder.net/forums/showthread.php?t=35360&highlight=emp+water+pump

Here is the thread from Blackened300a with the water pump pics and install

[magindat]

John, It's a Stewart EMP. I absolutely love mine. Better flow, cooler temps, less parasitic HP draw, no chance of electric failure.

http://www.mercurymarauder.net/forums/showthread.php?t=35360&highlight=emp+stewart

EMP-STE50046S for 4V Engines

I got mine from summit.


http://www.mercurymarauder.net/forums/showthread.php?t=35360&highlight=emp+water+pump

Here is the thread from Blackened300a with the water pump pics and install

Um... DUUUUUUUHHHH!!!!

[arejayesss]

OOPS:lol: Sorry

Maybe I was just trying to be thorough!!
Actually I was trying to find that comparison picture of the two pumps to post it, then I found the thread.

[RR|Suki]

Only proof I have is an 8 degree cooler average as noted on Aeroforce gauges on back to back very similar days.
Measurements were taken on a fixed-length highway trip and on a 30 minute driveway idle before and after.
Biggest difference was at idle - nearly 10 degrees cooler. Highway run was about 6 degrees cooler.

Interesting, idle is where my car usually likes to get rather hot... gives me something to think about.

[Zack]

I dont know how a car can idle x degrees cooler at idle with a different water pump :dunno:

When a car is parked with no airflow through the radiator, the coolant temp will always rise to the temp the cooling fan is programmed to come on at. Then it will go down 5-8 degrees, the fan will shut off, and the process repeats.

I have a Meziere on the KB car with NO thermostat and at idle, the coolant temp goes straight up to where the fan comes on, and repeats.

[magindat]

I dont know how a car can idle x degrees cooler at idle with a different water pump :dunno:

When a car is parked with no airflow through the radiator, the coolant temp will always rise to the temp the cooling fan is programmed to come on at. Then it will go down 5-8 degrees, the fan will shut off, and the process repeats.

I have a Meziere on the KB car with NO thermostat and at idle, the coolant temp goes straight up to where the fan comes on, and repeats.

It may then be relevant that my fan temp is set at 190 and my stat is 180. I would previously idle in my driveway at or around 196. I now idle at 188 and can't get it to budge up or down from there.

In other words, I agree, Zack, but I think there's room between the fan temp and stat temp for improvement.

[ctrlraven]

I'm def. going to get the EMP/Stewart WP before it starts to get warm around here again.

[Cobra25]

How many Gallons per minute does it pump at idle and on the high way lets say doing 55-60 mph? The Meziere Electric water pump pumps 42 Gallons per minute constent.

[magindat]

I am on the phone with Stewart right now.

20 gpm at 1000 RPM
130 gpm at 7500 RPM

Assumes stock pullies.

So, when the engine needs it most (higher revs under boost), electric isn't flowing even half of the Stewart.

Stewart uses less than 3HP to do this.

Stewart has an electric much like the Meziere and won't recommend it for anything over 400 CHP. They say their's out performs the Mezeire (of course they do), but still won't use it over 400 HP in any motor.

So, for our 525-600 CHP (425-475 RWHP) supercharged cars, plus the extra weight and engine load, hard numbers say don't go electric.

[Cobra25]

No one that I know of runs their marauder at 7500 RPM so 130 gpm is quite extreme in my opionion and creat's alot of internal presure. I've had the electric pump for over 3 1/2 years, I just put in a new one in a few days ago. In my car it runs cooler than a stock Marauder and if your at the track or the car is running a little hot you can turn the engine off and still run the electric pump to cool it off more quicker. It all boils down to personal preference which is better for you.

[Blackened300a]

The piece of mind that my engine isn't in the hands of a electric motor which can fail without warning is what made my decision clear on what to choose. Not to mention that its also half the price and gives the same performance gains.

[Cobra25]

It still boils down to personal preference . If you feel it give's you peace of mind then thats good. 1/2 the price thats true.
The piece of mind that my engine isn't in the hands of a electric motor which can fail without warning is what made my decision clear on what to choose. Not to mention that its also half the price and gives the same performance gains.

[magindat]

It is indeed personal preference. We discuss specs and post our feeling for the edification of others who have yet to make the decision.

For Cobra25 without the big stereo, the 40 amp draw is no big deal. For me, on the highway, I'm pullin and average of 50 for music, 5 for the CB and there's no way I'm addin 40 for the water pump.

To each their own. This thread, however, gives good numbers for those doing research.

[FordNut]

It is indeed personal preference. We discuss specs and post our feeling for the edification of others who have yet to make the decision.

For Cobra25 without the big stereo, the 40 amp draw is no big deal. For me, on the highway, I'm pullin and average of 50 for music, 5 for the CB and there's no way I'm addin 40 for the water pump.

To each their own. This thread, however, gives good numbers for those doing research.

True, it's personal preference. But I believe you're off on the amperage draw of the pump. Mine is on a 20 amp fuse and it doesn't blow, so the draw is for sure less than 20 rather than the 40 you mentioned.

[magindat]

A much better number. Perhaps I confuse the fuse with the GPM!
Nonetheless, you've seen the stereo, Brian, so now more amp draw for me!!! :D

[FordNut]

... you've seen the stereo, Brian, so now more amp draw for me!!! :D

Yep, killer sound system! Different priorities I guess. Every little bit of RWHP matters more than dB for some of us! :burnout:

[magindat]

Yep, killer sound system! Different priorities I guess. Every little bit of RWHP matters more than dB for some of us! :burnout:

Agreed. On my daily, great sound is worth giving up a few 10ths at the track!

[Pops]

I like both! But the horse power is a lot more gratifying. I must be getting to old. I spend more time listening to talk radio than music. But I will have a killer stereo when it comes out. The high performance shop that I use frowns on it as it takes a quarter second off the car due to the weight.

[magindat]

Well, then. There you have it, John. The entire water pump debate 'boiled' down! Can't wait to see what you come up with next for a system. Am I gonna have to up my game?

[Pops]

Yes You are! The hand built Premier 4 channel amp is here.

[magindat]

Yes You are! The hand built Premier 4 channel amp is here.

OH YOU SUCK!!!!

I had the purple Class A's back in the day. Wish I never gave them up!!!

Dream system =
DEH-P880PRS head
DEQ-P8000 control
PRS-A900
4x TS-C720PRS
2x TS-T3PRS
4x TS-D2501
PRS-D2000SPL

How 'bout you send it all to Florida for free and make my car a demo vehicle, hmmm?!

[Pops]

Not only hand built but hand built capaciters in them. Thiose old purple amps were great!

[magindat]

You're KILLIN me!!!!

Hey, if you ever come across one of those purple Class A's, (the roundy edge or squarey edge - I don't care) gimme a shout. I'd love to have one (or several) again.

Also, If you come across a Linear Power, my 22 year old, 1000W friend needs a play-mate!

[Svashtar]

One comment, the Meziere puts out 55 GPM constant, not 42 IIRC. I also have mine on a dedicated 20 amp fuse. No HP drain on the engine at all. Mine is a daily driver and so far no issues. My mechanic builds and races dragsters and uses an electric WP on those, with an internal dash mounted switch for it so he can run water thru the block with the engine off.

I have to say tho that if this WP were an option when I was looking a couple of years ago I might have considered it. Nice unit, great price and certainly a big improvement over the factory option, with very little HP loss. Nice find for MM guys. :up:

[Marauderjack]

I have about 20K miles on my Emp-Stewart pump and it seems to work very well but I can't see that it cools any better or worse than the OEM it replaced!!:shake: I monitor water temp with a ScanGauge II!!:beer:

It looks to be a much improved design and better constructed but do we actually need 2x-3x the OEM flow capacity for street cars.....I cannot answer that??:cool:

Would I do it again....probably since it give you peace of mind with the extra capacity and improved impeller!!:beer:

I don't know anything about electric pumps but it seems nice to be able to run it after a HOT trip down the 1320!!:bows:

Marauderjack:cool4:

[Krytin]

One comment, the Meziere puts out 55 GPM constant, not 42 IIRC. I also have mine on a dedicated 20 amp fuse. No HP drain on the engine at all. Mine is a daily driver and so far no issues. My mechanic builds and races dragsters and uses an electric WP on those, with an internal dash mounted switch for it so he can run water thru the block with the engine off.

I have to say tho that if this WP were an option when I was looking a couple of years ago I might have considered it. Nice unit, great price and certainly a big improvement over the factory option, with very little HP loss. Nice find for MM guys. :up:
I'm not trying to start trouble but any electric draw in the car will put a parasitic load on the engine via the alternator - electric pumps are not "free" as far as load on the engine, just very low!

[Svashtar]

I'm not trying to start trouble but any electric draw in the car will put a parasitic load on the engine via the alternator - electric pumps are not "free" as far as load on the engine, just very low!

No, man, good point. You're correct. Guess it's one of those purely preference things, or more likely just what you went with at first. Because of the $ commitment I would tend to stick with whatever my first choice was, whether it was more or less than something new.

Frinstance I bought a nice trunk lid cover, and then later a fancier one came out. I bought the UHI from that newer company, but no way I'm going to yank a good trunk lid cover that is strong and well made, because the later one has prettier stitching. I'll just have to suffer along. ;)

Like I said, a couple of years ago I might have strongly considered this. I like being able to turn the key engine off and cool the engine, but also know there is a concern about the electrical failing. I have so much stuff wired into my system now that I haven't sprung for the water pump watchdog audible warning system for the Meziere, and that would add another $100 anyway.

Norm

[magindat]

At the end of the day it DOES boil down to personal preference and driving habits. Fortunately, these discussions help people make those personal decisions through the benefit of our research and trial/error.

This can be a 'heated' debate subject. Awesome that we're keeping it 'cool'!!!

[Local Boy]

Right on guys!

Both pumps are great additions to the MM...It's just a matter of what floats your boat...

ALOHA

[Lowndex]

I bought it from Reinhart Automotive. Be sure you ask for the wiring kit. Also, consider a gauge for monitoring the output side of the pump; not just an LED showing power is applied to the pump. To be absolutely safe, consider installing a digital gauge (see Dennis at Reinhart Automotive) to monitor the water temperature on the pump output.

http://www.meziere.com/ps-1158-0-WP346S.aspx

[Blackened300a]

I bought it from Reinhart Automotive. Be sure you ask for the wiring kit. Also, consider a gauge for monitoring the output side of the pump; not just an LED showing power is applied to the pump. To be absolutely safe, consider installing a digital gauge (see Dennis at Reinhart Automotive) to monitor the water temperature on the pump output.

http://www.meziere.com/ps-1158-0-WP346S.aspx

Whats the grand total for all of this?