Is Ls1 Water Pump Same As Ls2?
Race Director
Joined: Jan 2007
Posts: 16,513
Likes: 4
From: Official Dirty Dozen Member
many people use the Evans water pump..
Its manufactured for high volume & high velocity..
1000% better....
http://www.evanscooling.com/main13.htm
Its manufactured for high volume & high velocity..
1000% better....
http://www.evanscooling.com/main13.htm
PASS
Heel & Toe
Joined: Aug 2006
Posts: 15
Likes: 1
From: Oceanside Ca.
pumps
The graph I provided were pump flow tests done at Evans test facility in Ct. roughly three years ago. I sent them the pumps to test.
Darton had separate tests done to compare the Evans pump against the stock LS1 pump for flow distribution at Caldwell Developments. The stock pump starts to cavitate around 5,000 pump rpm. The right bank flow also decreases at and above that rpm.
The ten horsepower per gallon a minute is flywheel horsepower. No engine is under constant loading all the way around a road race course. For that reason, you can get away with far less pumping capacity than I used as a reference.
Most highway cars will get away with the electric pump. That because you are not using much more than seventy horsepower +- cruising down the highway at seventy five miles an hour.
The Evans pump retails for $469.95, with pulley. Hard coated pulley is a bit more depending on size. The pump alone is $400.
Steve
Darton had separate tests done to compare the Evans pump against the stock LS1 pump for flow distribution at Caldwell Developments. The stock pump starts to cavitate around 5,000 pump rpm. The right bank flow also decreases at and above that rpm.
The ten horsepower per gallon a minute is flywheel horsepower. No engine is under constant loading all the way around a road race course. For that reason, you can get away with far less pumping capacity than I used as a reference.
Most highway cars will get away with the electric pump. That because you are not using much more than seventy horsepower +- cruising down the highway at seventy five miles an hour.
The Evans pump retails for $469.95, with pulley. Hard coated pulley is a bit more depending on size. The pump alone is $400.
Steve
Were these independent tests? Meziere advertises 55 GPM and 35 GPM for their "race pump". Not sure which is included in the plot above.
The 1 GPM/10 HP that you state in your post, is that a rule of thumb to use the curves? Also, is the flywheel or rear wheel hp (since most posts on here usually refer to dyno numbers).
I have also corresponded with Evans on their thermostats and got some interesting information (I also asked about their ceramic coating):
"The stock t-stat from GM will work on our pump. But our t-stat works better as it opens much farther then stock.The stock t-stat, as does ours, allows for coolant flow, but they also have a foot connected to them that when the t-stat opens, this foot blocks off the bypass. Ours does a better job of closing off the bypass and does not allow coolant into the bypass circuit. The stock one does not have that strong of a spring to close off the bypass. As far as the ceramic look goes, I will say that for a part to look like polished aluminum ,it must be totally smoothed out. Our ceramic coated pumps are not smoothed out, just coated, so you have the ease of cleaning it and it is shiny but not a "polished look" shiny. The pump is also coated inside and out before assembly. That gives it protection and better flow capabilities inside as well. I don't have any pics of it online but if you ever seen something that is Jet-Hot coated, that's what the ceramic coating looks like. We also can powder coat any pump to match a specific color too. The difference is only the outside is powder coated, but you have many more colors to choose from....hope this helps...........Tom"
The 1 GPM/10 HP that you state in your post, is that a rule of thumb to use the curves? Also, is the flywheel or rear wheel hp (since most posts on here usually refer to dyno numbers).
I have also corresponded with Evans on their thermostats and got some interesting information (I also asked about their ceramic coating):
"The stock t-stat from GM will work on our pump. But our t-stat works better as it opens much farther then stock.The stock t-stat, as does ours, allows for coolant flow, but they also have a foot connected to them that when the t-stat opens, this foot blocks off the bypass. Ours does a better job of closing off the bypass and does not allow coolant into the bypass circuit. The stock one does not have that strong of a spring to close off the bypass. As far as the ceramic look goes, I will say that for a part to look like polished aluminum ,it must be totally smoothed out. Our ceramic coated pumps are not smoothed out, just coated, so you have the ease of cleaning it and it is shiny but not a "polished look" shiny. The pump is also coated inside and out before assembly. That gives it protection and better flow capabilities inside as well. I don't have any pics of it online but if you ever seen something that is Jet-Hot coated, that's what the ceramic coating looks like. We also can powder coat any pump to match a specific color too. The difference is only the outside is powder coated, but you have many more colors to choose from....hope this helps...........Tom"
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
The graph I provided were pump flow tests done at Evans test facility in Ct. roughly three years ago. I sent them the pumps to test.
Darton had separate tests done to compare the Evans pump against the stock LS1 pump for flow distribution at Caldwell Developments. The stock pump starts to cavitate around 5,000 pump rpm. The right bank flow also decreases at and above that rpm.
The ten horsepower per gallon a minute is flywheel horsepower. No engine is under constant loading all the way around a road race course. For that reason, you can get away with far less pumping capacity than I used as a reference.
Most highway cars will get away with the electric pump. That because you are not using much more than seventy horsepower +- cruising down the highway at seventy five miles an hour.
The Evans pump retails for $469.95, with pulley. Hard coated pulley is a bit more depending on size. The pump alone is $400.
Steve
Darton had separate tests done to compare the Evans pump against the stock LS1 pump for flow distribution at Caldwell Developments. The stock pump starts to cavitate around 5,000 pump rpm. The right bank flow also decreases at and above that rpm.
The ten horsepower per gallon a minute is flywheel horsepower. No engine is under constant loading all the way around a road race course. For that reason, you can get away with far less pumping capacity than I used as a reference.
Most highway cars will get away with the electric pump. That because you are not using much more than seventy horsepower +- cruising down the highway at seventy five miles an hour.
The Evans pump retails for $469.95, with pulley. Hard coated pulley is a bit more depending on size. The pump alone is $400.
Steve
Thanks for sharing Steve, the Evans will definetely be going on when my forged engine goes in
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Any chance you have more information on the pulleys that are available or where to find this information (such as part numbers)? I have looked on their web site and haven't found them. Evans was high on my list before this thread started so this information is very timely for me as well.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
Any chance you have more information on the pulleys that are available or where to find this information (such as part numbers)? I have looked on their web site and haven't found them. Evans was high on my list before this thread started so this information is very timely for me as well.
The part number for the stock diameter water pump pulley is EP3916. The price is $170.
Another bit of information that he shared with me was the fact that the LS family of waterpumps have a bypass circuit that at high engine rpms sends hot water back to the oulet size of the radiator. This reduces the efficiency of the already undersize Corvette radiator.
The fix for this bypass is a remote thermostat. David told me that Mustang and Mustang Corbra owners buy these bypass kits for their high output engines by the hundreds. He can only remember selling one of the kits to Corvette owners. It seems our vanity keeps us from fixing our cooling problem.
Last edited by Pumba; Feb 20, 2008 at 08:13 PM.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
http://www.evanscooling.com/main3.htm
From there so to the tab that has THERMOSTATS & CAPS. You will find a remote thermostat shown there. If you are interested, you should call Evans. They do not list all of their parts and part numbers on their web site.
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Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
I had a very informative conversation this afternoon with Dave at Evans Cooling.
The part number for the stock diameter water pump pulley is EP3916. The price is $170.
Another bit of information that he shared with me was the fact that the LS-family waterpump has a bypass circuit that at high engine rpms sends hot water back to the oulet size of the radiator. This reduces the efficiency of the already undersize Corvette radiator.
The fix for this bypass is a remote thermostat. Davd told me that Mustang and Mustang Corbra owners buy these bypass kits for their high output engines by the hundreds. He can only remember selling one of the kits to Corvette owners. It seems our vanity keeps us from fixing our cooling problem.
The part number for the stock diameter water pump pulley is EP3916. The price is $170.
Another bit of information that he shared with me was the fact that the LS-family waterpump has a bypass circuit that at high engine rpms sends hot water back to the oulet size of the radiator. This reduces the efficiency of the already undersize Corvette radiator.
The fix for this bypass is a remote thermostat. Davd told me that Mustang and Mustang Corbra owners buy these bypass kits for their high output engines by the hundreds. He can only remember selling one of the kits to Corvette owners. It seems our vanity keeps us from fixing our cooling problem.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
1) LS High Output Water Pump -------- p/n EP3913
2) Stock-size Water Pump Pulley ------ p/n EP3916
3) 175 degree F Remote Thermostat - p/n E3006
4) Thermostat Install Kit --------------- p/n E3052
5) LS Heater Hose Shutoff Kit --------- p/n E2004
These items will even the side-to-side coolant flow in my engine, increase the volume of coolant flow per minute, feed the engine only coolant from the cold side of the radiator - not the hot bypass coolant, and allow me to turn off the hot coolant from the heater core when I go to the track.
Last edited by Pumba; Feb 20, 2008 at 11:39 AM.
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
No I do not. Today I ordered from Evans the following items:
1) LS High Output Water Pump ------ p/n EP3913
2) Stock-size Water Pump Pulley ---- p/n EP3916
3) 175 degree F Remote Thermostat - p/n E3006
4) Thermostat Install Kit ------------ p/n E3052
5) LS Heater Hose Shutoff Kit ------- p/n E2004
These items will even the side-to-side coolant flow in my engine, increase the volume of coolant flow per minute, feed the engine only coolant from the cold side of the radiator - not the hot bypass coolant, and allow me to turn off the hot coolant from the heater core when I go to the track.
1) LS High Output Water Pump ------ p/n EP3913
2) Stock-size Water Pump Pulley ---- p/n EP3916
3) 175 degree F Remote Thermostat - p/n E3006
4) Thermostat Install Kit ------------ p/n E3052
5) LS Heater Hose Shutoff Kit ------- p/n E2004
These items will even the side-to-side coolant flow in my engine, increase the volume of coolant flow per minute, feed the engine only coolant from the cold side of the radiator - not the hot bypass coolant, and allow me to turn off the hot coolant from the heater core when I go to the track.
Please post results in a thread (and PM me a link if you don't mind)
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
My Z06 is in storage for the winter. I will be taking it out of storage in early April.
At that time I am going to install the Evans Cooling products, along with a new Fidanza dual-disc clutch, L.G. Motorsports trans-diff cooler assembly, and have RPM Transmissions rebuild my diff with a new micro-polished 4.10:1 ring and pinion and a Quaife differential.
I will post pictures at that time.
At that time I am going to install the Evans Cooling products, along with a new Fidanza dual-disc clutch, L.G. Motorsports trans-diff cooler assembly, and have RPM Transmissions rebuild my diff with a new micro-polished 4.10:1 ring and pinion and a Quaife differential.
I will post pictures at that time.
Last edited by Pumba; Feb 20, 2008 at 11:57 AM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I would love to get feedback on the Fidanza as well. I considered them when I installed my Tex last year but they weren't quite in production yet. April is when I start mine as well.
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
No I do not. Today I ordered from Evans the following items:
1) LS High Output Water Pump -------- p/n EP3913
2) Stock-size Water Pump Pulley ------ p/n EP3916
3) 175 degree F Remote Thermostat - p/n E3006
4) Thermostat Install Kit --------------- p/n E3052
5) LS Heater Hose Shutoff Kit --------- p/n E2004
These items will even the side-to-side coolant flow in my engine, increase the volume of coolant flow per minute, feed the engine only coolant from the cold side of the radiator - not the hot bypass coolant, and allow me to turn off the hot coolant from the heater core when I go to the track.
1) LS High Output Water Pump -------- p/n EP3913
2) Stock-size Water Pump Pulley ------ p/n EP3916
3) 175 degree F Remote Thermostat - p/n E3006
4) Thermostat Install Kit --------------- p/n E3052
5) LS Heater Hose Shutoff Kit --------- p/n E2004
These items will even the side-to-side coolant flow in my engine, increase the volume of coolant flow per minute, feed the engine only coolant from the cold side of the radiator - not the hot bypass coolant, and allow me to turn off the hot coolant from the heater core when I go to the track.
Drifting
Joined: Apr 2008
Posts: 1,316
Likes: 2
From: St. Louis Mo
I have an electric Meziere pump that apparently is a POS on my 427 and it only gets up to 200* if its close to 100* outside and im running it hard. Never gets any hotter than 200.....(180 thermostat-btw) Explain that one....
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
Next, the Evans pump and heater bypass valve are functioning as advertised. On track days my coolant temperatures have dropped by about 5 degreees F when shutting off the water flow to the heater.
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
First, the Fidanza dual-disc clutch is doing just fine. Very smooth engagement, no chattering, and it holds everything I throw at it.
Next, the Evans pump and heater bypass valve are functioning as advertised. On track days my coolant temperatures have dropped by about 5 degreees F when shutting off the water flow to the heater.
Next, the Evans pump and heater bypass valve are functioning as advertised. On track days my coolant temperatures have dropped by about 5 degreees F when shutting off the water flow to the heater.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
I did not run my heater during track days up here in Michigan. On a 85 degree F day, my water usually ran 210 to 215 degrees F with my Ron Davis Racing Radiator and my oil ran 235 degrees F. With the heater valve closed, my water now runs about 207 to 212 degrees F. No change in the oil.
