water pump question. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rodman91 · 07-27-2009, 01:55 PM

What is the PSI on a edelbrock short water pump?

eightbanger · 07-27-2009, 03:18 PM

I am way outa my depth here....but do water pumps work on psi? or is it just volume of water moved by the rotating fins inside?
Sorry I can't be more help.

mclairmo · 07-27-2009, 03:31 PM

I don't think they are rated on pounds per square inch (psi), which is a measurement of pressure. They are rated on volume, such as 30 gallons per hour (gph). In my experience, the Edelbrock pumps are great, but very expensive. I think you can get comparable performance from a lower priced high volume water pump, such as the Procomp or the ones sold by Summit and Jeg's. The most important factor in fluid flow is the pulley ratios, IMO. Make sure to NOT use underdrive pulleys, such as those sold by March. Use a factory set up where that water pump pulley is noticeably smaller than the crank pulley. This will keep the low rpm flow high, which is what you want to keep the engine cool on the street. Run a new high flow thermostat and a clean radiator with a fan shroud and you should be fine.

cdowns · 07-27-2009, 04:19 PM

call edelbrocks tech center for info on edelbrock products

07-27-2009, 01:55 PM	#1
rodman91 Registered User Join Date: May 2009 Location: Fort Worth TX Posts: 59	water pump question. What is the PSI on a edelbrock short water pump?

07-27-2009, 03:18 PM	#2
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: water pump question. I am way outa my depth here....but do water pumps work on psi? or is it just volume of water moved by the rotating fins inside? Sorry I can't be more help. __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger

07-27-2009, 03:31 PM	#3
mclairmo Registered User Join Date: Jan 2006 Location: Take Off Posts: 1,908	Re: water pump question. I don't think they are rated on pounds per square inch (psi), which is a measurement of pressure. They are rated on volume, such as 30 gallons per hour (gph). In my experience, the Edelbrock pumps are great, but very expensive. I think you can get comparable performance from a lower priced high volume water pump, such as the Procomp or the ones sold by Summit and Jeg's. The most important factor in fluid flow is the pulley ratios, IMO. Make sure to NOT use underdrive pulleys, such as those sold by March. Use a factory set up where that water pump pulley is noticeably smaller than the crank pulley. This will keep the low rpm flow high, which is what you want to keep the engine cool on the street. Run a new high flow thermostat and a clean radiator with a fan shroud and you should be fine.

07-27-2009, 04:19 PM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: water pump question. call edelbrocks tech center for info on edelbrock products __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY



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