Electric Water Pump ???
Thread Starter
Racer
Joined: Sep 2005
Posts: 484
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From: Redwood City CA
Electric Water Pump ???
I daily drive a 95 LT1 C4-A, I've been reading http://www.wku.edu/~nathan.plemons/h...rformance.html about the benefits of switching to a elec-pump. It go's on to recommend a new timing chane also. Any one done it (I'm sure there are many) that can share pic's. How much did you spend and where did you get the parts... Thanks for your replies. 
101st Airborne
101st Airborne
Last edited by Ruff Rider; Nov 21, 2006 at 10:21 AM.
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
I went to the electric water pump and this is how I did it:
https://www.corvetteforum.com/techti...=231&TopicID=2
I know it's long, but I tried to cover everything. Our Tech Tips on our forum has a lot of good ideas and techniques.
https://www.corvetteforum.com/techti...=231&TopicID=2
I know it's long, but I tried to cover everything. Our Tech Tips on our forum has a lot of good ideas and techniques.
Thread Starter
Racer
Joined: Sep 2005
Posts: 484
Likes: 0
From: Redwood City CA
Originally Posted by Strick
I went to the electric water pump and this is how I did it:
https://www.corvetteforum.com/techti...=231&TopicID=2
I know it's long, but I tried to cover everything. Our Tech Tips on our forum has a lot of good ideas and techniques.
https://www.corvetteforum.com/techti...=231&TopicID=2
I know it's long, but I tried to cover everything. Our Tech Tips on our forum has a lot of good ideas and techniques.
101st Airborne
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
Originally Posted by rocco16
Electric water pumps? What's the point?
I can possibly see one for a drag racer, but otherwise.....
Larry
code5coupe
I can possibly see one for a drag racer, but otherwise.....
Larry
code5coupe
Thread Starter
Racer
Joined: Sep 2005
Posts: 484
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From: Redwood City CA
Originally Posted by TM-96CE
And you don't have to worry about it puking all over your opti.
And it's a simple 30 minute job to replace.
Simple 30min ????? The information that Strick supplied took much MUCH longer then 30min...
101st Airborne
Last edited by Ruff Rider; Nov 21, 2006 at 03:55 PM.
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Racer
Joined: Jul 2004
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From: San Diego CA
Originally Posted by Ruff Rider
Simple 30min ????? Strick's information on it much MUCH longer then 30min... 101st Airborne
101st Airborne I think TM was referring to after you have installed the EWP if you ever had to replace it the process should take about a 30 - 40 minutes. On my CSR pump there are 6 machine screws (if memory is working today
) and since I purchased the Painless wiring harness for EWPs its a matter of disconnecting BATT, pulling harness plug, undoing 6 screws, trash old unit and reinstall new unit in reverse order from above 
Thread Starter
Racer
Joined: Sep 2005
Posts: 484
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From: Redwood City CA
Originally Posted by gslotman
I think TM was referring to after you have installed the EWP if you ever had to replace it the process should take about a 30 - 40 minutes. On my CSR pump there are 6 machine screws (if memory is working today ) and since I purchased the Painless wiring harness for EWPs its a matter of disconnecting BATT, pulling harness plug, undoing 6 screws, trash old unit and reinstall new unit in reverse order from above
) and since I purchased the Painless wiring harness for EWPs its a matter of disconnecting BATT, pulling harness plug, undoing 6 screws, trash old unit and reinstall new unit in reverse order from above 101st Airborne
Race Director
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
Originally Posted by rickreeves1
5-10hp
Originally Posted by rickreeves1
and constant H2O pressure through all rpms???
That's the beauty of the standard wp: more engine rpm gives you more water flow. Less rpm gives you less water flow. Just what the engine needs.
Those are the reasons I fail to see an advantage for the electric pump.
Am I missing something?
Larry
code5coupe
Last edited by rocco16; Nov 21, 2006 at 05:08 PM.
Large Impressive Member
Joined: Jul 2003
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by rocco16
If it takes 5-10hp to move that water, then the electric wp must absorb 5-10hp worth of power from the alternator, which must be ultimately supplied by the engine. Either way, the engine has to supply the power to spin either the wp or the alt(to cover the extra load).
If that's true, you are either pushing an excess of water through the engine at low rpm, or you are not getting enough water at high rpm....or maybe both.
That's the beauty of the standard wp: more engine rpm gives you more water flow. Less rpm gives you less water flow. Just what the engine needs.
Those are the reasons I fail to see an advantage for the electric pump.
Am I missing something?
Larry
code5coupe
If that's true, you are either pushing an excess of water through the engine at low rpm, or you are not getting enough water at high rpm....or maybe both.
That's the beauty of the standard wp: more engine rpm gives you more water flow. Less rpm gives you less water flow. Just what the engine needs.
Those are the reasons I fail to see an advantage for the electric pump.
Am I missing something?
Larry
code5coupe
I wouldn't have an LTx engine w/o an EWP fitted to it. Does it all make more sense now?
Le Mans Master
Joined: Aug 2004
Posts: 5,141
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From: Metairie Louisiana
Originally Posted by rocco16
If it takes 5-10hp to move that water, then the electric wp must absorb 5-10hp worth of power from the alternator, which must be ultimately supplied by the engine. Either way, the engine has to supply the power to spin either the wp or the alt(to cover the extra load).
Last edited by rickneworleansla; Nov 22, 2006 at 02:21 PM.
Team Owner
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From: Boston, Dallas, Detroit, SoCal, back to Boston MA
It also helps out in traffic. When I was out in the SoCal desert overheating was never an issue
Take the time and the $$$ to pull the drive out of the cover, I left my drive in and now I have a small oil leak, not much, but enough so it 'marks it's territory '
Take the time and the $$$ to pull the drive out of the cover, I left my drive in and now I have a small oil leak, not much, but enough so it 'marks it's territory '
Race Director
Joined: Jan 2005
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From: Slidell Louisiana
Originally Posted by Corvette Kid
The number one reason I used an EWP on my LT1 is so a true double roller timing set could be installed. But there are other advantages and no real downside IMO. At higher RPMs, a stock mechanical pump can cavitate because they are designed to be most efficient in the "normal" RPM ranges. Also, as the pump turns faster at higher RPMs, parasitic HP loss increases. There's nothing inherently wrong with the coolant running at a constant speed, as long as it meets the needs under all conditions. Temperature regulation is achieved by other means, of course. The Meziere HD pump pulls under 8 amps and I've never blown the 10 amp fuse in mine in nearly 25K miles of use. And by eliminating the mechanical drive on these engines, there's one less seal to leak up front. I wouldn't have an LTx engine w/o an EWP fitted to it. Does it all make more sense now?
I wouldn't have an LTx engine w/o an EWP fitted to it. Does it all make more sense now? Not only can you use a double roller chain, you save money too. With the cost savings of using a standard SBC double roller timing chain vice a GM HD LTX chain I was able to buy my Mez HD.
I believe the dyno difference comes from the impeller being optimized for one speed, vice having to work at a wide range off speeds.
I have not had trouble with my MEZ HD; however, I know someone that had their MEZ HD fail quickly after the install.
MIke
Thread Starter
Racer
Joined: Sep 2005
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From: Redwood City CA
Originally Posted by aboatguy
Not only can you use a double roller chain, you save money too. With the cost savings of using a standard SBC double roller timing chain vice a GM HD LTX chain I was able to buy my Mez HD.
I believe the dyno difference comes from the impeller being optimized for one speed, vice having to work at a wide range off speeds.
I have not had trouble with my MEZ HD; however, I know someone that had their MEZ HD fail quickly after the install.
MIke
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
Just to highlight the advantages, in hot conditions the water is moving faster than the mechanical pump at idle, if you do race, you can cool the motor down after shutdown by running the ewp by turning on the key (I also can manually turn on my fans and increase the cool down), since I've put the ewp in and a 180 stat, my temp ranges, in all conditions, between 185 and 190. As already mentioned, you eliminate one oil leak and once installed it is easy to replace. One more thing, it's a piece of cake to burp the system when changing the antifreeze, you just turn the key on and the pump comes on and out go the bubbles. Yes, it's worth while.
Why the Pianeless Harness?
Why the Pianeless Harness?
Drifting
Joined: May 2005
Posts: 1,370
Likes: 1
From: Raleigh NC
I felt a decent seat of the pants increase in performance as soon as I added a Meziere. Next time at the track the car ran .24 sec better in the 1/4. Part of that gain was the cooler air, but my guess the water pump was worth about a tenth and a half.
Race Director
Joined: Jan 2005
Posts: 10,641
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From: Slidell Louisiana
Originally Posted by Ruff Rider
What did you spend on your Meziere HD ?????
Meziere HD Water Pump [ MEZ-WP118HD ] 229.99 175.12
Thread Starter
Racer
Joined: Sep 2005
Posts: 484
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From: Redwood City CA
Originally Posted by Strick
Just to highlight the advantages, in hot conditions the water is moving faster than the mechanical pump at idle, if you do race, you can cool the motor down after shutdown by running the ewp by turning on the key (I also can manually turn on my fans and increase the cool down), since I've put the ewp in and a 180 stat, my temp ranges, in all conditions, between 185 and 190. As already mentioned, you eliminate one oil leak and once installed it is easy to replace. One more thing, it's a piece of cake to burp the system when changing the antifreeze, you just turn the key on and the pump comes on and out go the bubbles. Yes, it's worth while.
Why the Pianeless Harness?
Why the Pianeless Harness?