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High volume water pumps #2741036
02/08/20 07:06 PM
02/08/20 07:06 PM
Joined: Jan 2007
Posts: 384
Norway
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General 68 Offline OP
enthusiast
General 68  Offline OP
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Joined: Jan 2007
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Norway
I wonder if I need a high volume water pump. I have ran two different bb's, 440 and 512 in my car and both experienced the normal 180 temp to rise quite a bit past 200 when idling in heavy traffic and uplining at the track. So far no overheating. Temp cools down when revving or getting up to speed. Two different radiators. First stock 3 row 26". Then alu 2 row with bigger tubes. No change. Run stock water pump, 7 blades I think. Tried different fan clutches. 7 blade oem fan, shroud with the fan about in the middle, 1" distance between clutch an radiator. Playing with timing and mixture makes no difference. What do you think? Any prefered pumps? Was looking at Milodon high volume pump with aluminum housing. Any experience with this pump?
Thanks

Re: High volume water pumps [Re: General 68] #2741062
02/08/20 08:39 PM
02/08/20 08:39 PM
Joined: Sep 2014
Posts: 2,942
Washington
M
madscientist Offline
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madscientist  Offline
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Joined: Sep 2014
Posts: 2,942
Washington
Originally Posted by General 68
I wonder if I need a high volume water pump. I have ran two different bb's, 440 and 512 in my car and both experienced the normal 180 temp to rise quite a bit past 200 when idling in heavy traffic and uplining at the track. So far no overheating. Temp cools down when revving or getting up to speed. Two different radiators. First stock 3 row 26". Then alu 2 row with bigger tubes. No change. Run stock water pump, 7 blades I think. Tried different fan clutches. 7 blade oem fan, shroud with the fan about in the middle, 1" distance between clutch an radiator. Playing with timing and mixture makes no difference. What do you think? Any prefered pumps? Was looking at Milodon high volume pump with aluminum housing. Any experience with this pump?
Thanks



Yes. And make sure the pump is turning crank speed or faster.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: High volume water pumps [Re: madscientist] #2741065
02/08/20 08:46 PM
02/08/20 08:46 PM
Joined: Nov 2007
Posts: 20,260
Kirkland, Washington
Pacnorthcuda Offline
Too Many Posts
Pacnorthcuda  Offline
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Joined: Nov 2007
Posts: 20,260
Kirkland, Washington
I’m running a Flowkooler, best one I’ve tried and I’ve run stockers and Edlebrocks. It won’t solve a cooling system issue caused by a different part, but they do flow well, and it lessened my issue (same as yours) by at least 5 degrees.

Re: High volume water pumps [Re: Pacnorthcuda] #2741093
02/08/20 10:17 PM
02/08/20 10:17 PM
Joined: Dec 2007
Posts: 12,211
Great Neck,LI,new york
hemi-itis Offline
I Live Here
hemi-itis  Offline
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Joined: Dec 2007
Posts: 12,211
Great Neck,LI,new york
I use a 6 cylinder pulley that is smaller in diameter.Stock aluminum housing and pump with a $200 aluminum Afco rad and single Spal pusher fan. It's all in the combo grin

8.3.17 001.jpg8.26.17 011.jpg
Last edited by hemi-itis; 02/08/20 10:42 PM.

HEMI-ITIS has no cure. My condition is fully BLOWN!!!

New best 60ft,, 1.42,1/8, 6.0 @117,, 9.38 @146.75 with 6 lbs boost @3700 lbs
Re: High volume water pumps [Re: hemi-itis] #2741382
02/09/20 09:10 PM
02/09/20 09:10 PM
Joined: Apr 2005
Posts: 65
ma.
D
duspan Offline
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duspan  Offline
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Joined: Apr 2005
Posts: 65
ma.
flow kooler water pump also a hi flow thermostat and a upper pulley bigger than bottom pulley or at least same size!

Re: High volume water pumps [Re: duspan] #2741481
02/10/20 09:27 AM
02/10/20 09:27 AM
Joined: Jan 2003
Posts: 11,725
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 11,725
Marion, South Carolina [><]
I've used the Flow-Kooler and Milodon HV water pumps w/ good results. Make you use a high flow/balance flow thermostat like a Robert Shaw.


CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: High volume water pumps [Re: an8sec70cuda] #2741647
02/10/20 05:20 PM
02/10/20 05:20 PM
Joined: Jan 2003
Posts: 6,449
N.E. Ohio
K
KillerBee Offline
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K

Joined: Jan 2003
Posts: 6,449
N.E. Ohio
Exact same issues with the wife's 440 Six Pack Challenger.
Not sure if it's a coolant flow or air flow issue or both.
Engine is fresh mild build with stealth heads.
I have the timing set very mild and the carb(s) jetting/adjustment seems good.

Outside temperature is a big factor.
In cooler temps with low humidity no issues anytime.
In hot, humid 85 plus degree weather is when the engine heats up when sitting.
Driving/moving around in any temp it stays at 180 all the time.
When it's hot out if sitting idling or stuck in heavy traffic temps will creep up eventually getting to 200 plus.
As soon as the car gets moving again temp gets back down to 180 pretty quick.
Engine temps always stay at 180 on the highway.

I've tried a high flow 160 thermostat with new factory custom built 26" 4 core radiator using a factory shroud, aluminum pump housing and HD water pump with 7 blade factory fan with no clutch.
Then went with a new aluminum 26" radiator and high flow Flow Kooler water pump with coolant recovery tank/system.
This made a slight improvement but temps still creeped up when sitting at idle on hot days.

So what is working the best is I added a pusher fan in front of the radiator.
I currently have the fan on a toggle switch and turn it on when the engine temp gets just under 200.
The fan gets the engine temp down pretty quick and the temp stays down as long as the fan stays on.
When I do tuning on the car I turn the pusher fan on and can work on the car sitting at idle indefinitely.
I would like to get an adjustable fan controller installed and keep the toggle switch as a backup.



fan1.jpg
Last edited by KillerBee; 02/10/20 05:29 PM.
Re: High volume water pumps [Re: KillerBee] #2741805
02/11/20 01:33 AM
02/11/20 01:33 AM
Joined: Jan 2007
Posts: 384
Norway
G
General 68 Offline OP
enthusiast
General 68  Offline OP
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Joined: Jan 2007
Posts: 384
Norway
Good info! I'll Try av Flow Kopler first, but I have a feeling it also is a fan/air problem.

Re: High volume water pumps [Re: KillerBee] #2741849
02/11/20 09:22 AM
02/11/20 09:22 AM
Joined: Jan 2007
Posts: 6,602
Mt Morris Michigan
mopar dave Offline
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Posts: 6,602
Mt Morris Michigan
Really not hurting anything at 200*. My filled 511 would run 218* going down the road and it never hurt anything. I was using Evans coolant and a good oil (Amsoil) at the time. Had Milodon HV water pump and twin electric spal fans. If I stopped, the temp would pull right back down to the 200 range. I removed the electric fans and reinstalled flex fan with shroud and temps would stay in the + or - 200 range depending on air temp. I reinstalled bigger electric spal fans for this next season. Will see how it goes. Yeah, 200* I wouldn't worry about. Put some Evans waterless coolant in there and no worry about boil over til 374* or in our world, never.

Last edited by mopar dave; 02/12/20 10:49 AM.
Re: High volume water pumps [Re: mopar dave] #2741954
02/11/20 02:19 PM
02/11/20 02:19 PM
Joined: Jan 2003
Posts: 13,694
Eagle, Idaho
Neil Offline
I Live Here
Neil  Offline
I Live Here

Joined: Jan 2003
Posts: 13,694
Eagle, Idaho
The Edelbrock pumps with the long curved blades move a lot more fluid for each rotation vs the stock type straight blade pumps. They are $$$, but do work well.

The high flow T-stat is a must do item with these.

Re: High volume water pumps [Re: Neil] #2741981
02/11/20 03:20 PM
02/11/20 03:20 PM
Joined: Aug 2003
Posts: 34,491
Bend,OR USA
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Cab_Burge Offline
I Win
Cab_Burge  Offline
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Joined: Aug 2003
Posts: 34,491
Bend,OR USA
What are you guys calling a "high flow" thermostat? Pictures will help help


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: High volume water pumps [Re: Cab_Burge] #2741987
02/11/20 03:31 PM
02/11/20 03:31 PM
Joined: Jan 2003
Posts: 11,725
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 11,725
Marion, South Carolina [><]
Originally Posted by Cab_Burge
What are you guys calling a "high flow" thermostat? Pictures will help help

Also called balance flow.

thermostat.jpg

CHIP
'70 hemicuda street car...8.91 at 150.5 mph w/ 4.10s, 8.97 at 152.5 mph w/ 3.54s so far
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler
Re: High volume water pumps [Re: an8sec70cuda] #2742197
02/12/20 10:38 AM
02/12/20 10:38 AM
Joined: Sep 2003
Posts: 12,528
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 12,528
north of coder
i second the 200+ [a little] as no concern.
beer

Re: High volume water pumps [Re: moparx] #2742334
02/12/20 03:50 PM
02/12/20 03:50 PM
Joined: Jan 2007
Posts: 384
Norway
G
General 68 Offline OP
enthusiast
General 68  Offline OP
enthusiast
G

Joined: Jan 2007
Posts: 384
Norway
Sure 200 + some won't hurt anything. It is more a peace of mind thing. I will never be happy with 200+ and still creeping temps when stuck in traffic or lining up at the track😋


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