hi flow water pump - who makes a good one?
09-14-2011, 03:55 PM
#2
Le Mans Master
Member Since: Mar 2002
Location: Castro Valley Calif.
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20-'21-'22
'23-'24
I used an Edelbrock & have been happy with it the last few years.
Did you ever come up with anything on calculating the VE tables?
Did you ever come up with anything on calculating the VE tables?
09-14-2011, 05:32 PM
#3
Race Director
I always wondered if a high flow water pump is significantly better. It seems to me the thermostat would be a major restriction. I have heard of high flow thermostats. I think they're made by Robertshaw.
09-14-2011, 07:03 PM
#4
Its the impeller that makes the difference. The typical water pump impeller looks exactly like the fan on the alternator.....simple, inefficient. Thats a hi-production "stamped impeller".
The hi-flow pumps use the same body design with a cast impeller thats more turbine like and wayyy more efficient so it moves water several times better. The edlebrock that I had for yrs would move as much water at idle as the stock pump moved at 2500+ rpm....
When the coolant moves past the heat exchanger, it looses heat. When its stagnant at idle, heat builds and gets trapped in the block from poor circulation.
The slight restriction of the T-stat is necessary to prevent steam pockets and dry/hot spots. It causes a mild back pressure that causes the water passages to stay full and not exit too fast and allow dry spots. The exit for the heater hose in the front of the intake has a fitting (orifice) that serves the same purpose.
The hi-flow pumps use the same body design with a cast impeller thats more turbine like and wayyy more efficient so it moves water several times better. The edlebrock that I had for yrs would move as much water at idle as the stock pump moved at 2500+ rpm....
When the coolant moves past the heat exchanger, it looses heat. When its stagnant at idle, heat builds and gets trapped in the block from poor circulation.
The slight restriction of the T-stat is necessary to prevent steam pockets and dry/hot spots. It causes a mild back pressure that causes the water passages to stay full and not exit too fast and allow dry spots. The exit for the heater hose in the front of the intake has a fitting (orifice) that serves the same purpose.
09-14-2011, 08:51 PM
#9
Burning Brakes
Thread Starter
to 1 responder up above:
no not yet. I have a coolant leak that I think is a water pump issue. and if it is not, i am going with a high-flow water pump to see if that will help my 230F temperatures in my car's radiator.
edelbrock #8815
anyone know if this a "high-flow" water pump? or if there even is such a thing?
Last edited by mistaben; 09-14-2011 at 08:59 PM.
09-15-2011, 12:36 PM
#12
Instructor
I had the Edelbrock that's in Corvette Central put on my 84 and I had to put a new serpentine belt on after 3 days because it wasn't a direct fit replacement and my mechanics didn't catch it. Corvette Central didn't say anything about it and it didn't come with gaskets like they said it did either. I got a 180 degree thermostat too and replaced the upper and lower radiator hoses and now it's about 15 degrees cooler. Good Luck!
