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Author Topic:   Water Restrictor?
67Coupster
Gearhead

Posts: 189
From: Fortson, GA, USA
Registered: Oct 2001

posted 08-27-2002 03:56 PM     Click Here to See the Profile for 67Coupster   Click Here to Email 67Coupster     Edit/Delete Message   Reply w/Quote
What size water restrictor are you guys using? I'm using a Moroso electric water pump drive and don't have a clue on what size to use.

It's been very nice to cool the car off between runs but the car seems to get a little warm while just idling.

Thanks!

------------------
James
67 Coupe
393W, 4 Speed,
7.07 @ 98MPH 1/8
1.52 60'
'66 Fairlane 500XL
Daily Driver

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Dave_C
Gearhead

Posts: 1069
From: Gadsden, Al
Registered: Aug 99

posted 08-28-2002 12:42 AM     Click Here to See the Profile for Dave_C   Click Here to Email Dave_C     Edit/Delete Message   Reply w/Quote
James,

I used a restrictor in my 383W. I just used a cutoff tool and cut the center from an old thermostat. I removed the center "pellet", the spring and the sides that kept it all in place. Trimmed it up so that it left just a nice round hole.

Not sure of the size hole, but it worked well with that water pump and a copper/brass rad for 5 years. This past winter I swapped to an aluminum radiator just to make cool-downs quicker.

Later,

David Cole

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Moneymaker
Administrator

Posts: 27499
From: Lyons, IL, USA
Registered: May 99

posted 08-28-2002 09:22 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
One inch.

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Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator

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The Barry of BarrysGrrl

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67Coupster
Gearhead

Posts: 189
From: Fortson, GA, USA
Registered: Oct 2001

posted 08-28-2002 10:42 AM     Click Here to See the Profile for 67Coupster   Click Here to Email 67Coupster     Edit/Delete Message   Reply w/Quote

------------------
James
67 Coupe
393W, 4 Speed,
7.07 @ 98MPH 1/8
1.52 60'
'66 Fairlane 500XL
Daily Driver

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kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 08-28-2002 10:49 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
On my racecar, I dont use any restrictor with the electric water pump drive. My opinion, the pump just doesnt spin fast enough for it to be needed.

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67Coupster
Gearhead

Posts: 189
From: Fortson, GA, USA
Registered: Oct 2001

posted 08-28-2002 12:21 PM     Click Here to See the Profile for 67Coupster   Click Here to Email 67Coupster     Edit/Delete Message   Reply w/Quote
Easy enough to try out. I'll try it both ways. Your right Kid that pump doesn't seem to move a lot of water. If all else fails I may try one of those plates that rivets to the back of the water pump and see if it will increase the volume some. Thanks all!

James

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kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 08-28-2002 12:33 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
I also use the 40% overdrive pulley on my drive, and a hi flow water pump, and the water still doesnt seem to flow real fast. It's not too bad, but nothing like watching water flow with the crank hooked to it at 4500 rpm.

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Ryan Wilke
Gearhead

Posts: 2494
From: Stanton, Michigan 49707
Registered: Oct 2000

posted 08-28-2002 05:10 PM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by kid vishus:
I also use the 40% overdrive pulley on my drive, and a hi flow water pump, and the water still doesnt seem to flow real fast. It's not too bad, but nothing like watching water flow with the crank hooked to it at 4500 rpm.

I think the difference in the 10-tooth 1.125" dia) to the 14-tooth pulley (1.64" dia.) spinning on a 2600rpm elec. motor turning a cogged 3.25" diameter H2O pump pulley will increase the pump rpms from 710 to 1310 rpms... Your rpm & flow will differ with different-sized (diameter) drive & reciever pulleys. Do you know what your pump is rated to pump at a given rpm?

I once read that the plate on the back side of the typical H20 pump impeller is worth an extra 30% flow.... which is a sizable increase. But if your radiator can't carry away the amount of heat that's delivered to it, it doesn't matter how much water gets moved; it'll still overheat.

-- You might want to go with the gutted thermostat or try a properly sized washer.

Ryan

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