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  Water pumps, electric drive vs belt?

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Author Topic:   Water pumps, electric drive vs belt?
Rory McNeil
Gearhead

Posts: 1687
From: Surrey, B.C. Canada
Registered: Nov 2000

posted 05-21-2002 12:09 PM     Click Here to See the Profile for Rory McNeil   Click Here to Email Rory McNeil     Edit/Delete Message   Reply w/Quote
I recently put a new stock style Edelbrock alum. water pump on my 428. I usually ran a stock (heavy!) cast iron pump, along with an electric water pump drive. Since the new pump has some drag when turning the flange, I thought I would run it with a stock V belt setup for a while, to try and "loosen it up" a bit.I normally just ran a stock truck lower pulley on the damper & a 4" Moroso alt. pulley, so I added a matching truck WP pulley & a longer fan belt. I noticed that the engine runs much cooler this way, I entered the burnout box at 150 degrees, made my run, & after driving back to the pits, it was only at 165 degrees. Nice! With the old setup, I`d enter the burnout box at 140, & I`d be close to 200 degrees when I got back to the pit area. The nice thing about the electric set up, was you could leave the pump circulating for 10 or 15 minutes with engine off to bring the temp down, but late round hot lapping often meant dumping the hot water.Anyhow, what I`m trying to find out, is has anyone compared the ET differance between the belt driven pump vs the electric drive? Between the pump & the heavy slick tubes in my other post, & some humidity, I`m about 1 1/2 tenths & 2 MPH slower than my previous best numbers. Which item is the worst? I`ll be trying my electric pump drive in 2 weeks, but I`m looking for opinions on this.Thanks.

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78 Fairmont 428 4 speed [email protected]
80 Fairmont 302 5 speed [email protected]
85 Mustang NHRA Stocker under construction, 302 5 speed

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mustangboy
Gearhead

Posts: 1147
From: Ont, Canada
Registered: Mar 2002

posted 05-21-2002 06:45 PM     Click Here to See the Profile for mustangboy     Edit/Delete Message   Reply w/Quote
This isn't a direct comparison but when I take the belt off my power steering its good for a tenth.I would think your water pump would take at least as much power to turn if not more.

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Rory McNeil
Gearhead

Posts: 1687
From: Surrey, B.C. Canada
Registered: Nov 2000

posted 05-21-2002 07:36 PM     Click Here to See the Profile for Rory McNeil   Click Here to Email Rory McNeil     Edit/Delete Message   Reply w/Quote
I beleive that. On my 302 5 speed Fairmont streeter, I sometimes remove both the PS, & the alt/water pump belt. This leaves the crank turning nothing, & have picked up almost THREE tenths! Of course the engine must be fairly cool to allow this, & I put the belts back on before I drive back to the pits, but it works.

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78 Fairmont 428 4 speed [email protected]
80 Fairmont 302 5 speed [email protected]
85 Mustang NHRA Stocker under construction, 302 5 speed

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