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Need a small block water pump recommendation #992956
05/15/11 03:18 PM
05/15/11 03:18 PM
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471Magnum Offline OP
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I'm in the process of assembling my small block stroker. Had originally planned to just re-use the water pump off my stock 340, but after seeing how crusty it is, I'm going to spring for a new one.

Not looking for anything super high performance, but I want to make sure I get one that will move enough water to keep things cool with the extra power that will be on tap.

Rock Auto lists about 10 different pumps; some with six vanes, some with eight, some with A/C, and some without. Other than impeller design, are there any differences?


-Jim

I can fix it... my old man is a television repairman.
He's got the ultimate set of tools... I can fix it.

Currently Mopar-less
Re: Need a small block water pump recommendation [Re: 471Magnum] #992957
05/16/11 08:23 AM
05/16/11 08:23 AM
Joined: Jan 2003
Posts: 3,719
Space Station #5
471Magnum Offline OP
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Come on small block guys... share the knowledge. Need to place my order today.


Re: Need a small block water pump recommendation [Re: 471Magnum] #992958
05/16/11 09:20 AM
05/16/11 09:20 AM
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Lincoln Nebraska
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RapidRobert Offline
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Lincoln Nebraska
Actually most any wp is fine even rebuilt ones have a good track record. The MP one is good but pricey. Weld on an anticav plate. Get an 8 blade one and support the front shaft in front of the cross & press the vanes in the rear more forward till you have ~.040" clearance to the body and can mill the tim cover so you end up w .040" clearance from the anti cav plate to the flat (factor in your gasket thickness & adj bolt/washer length). Makes the pump FAR more efficient. Inside the tim cover 2 main water passages is a slight casting mold about halfway in on each one that can b removed w a whizzer in 15 seconds and use the smallest WP pulley you can fit. Have more but is the block bare or almost together


live every 24 hour block of time like it's your last day on earth
Re: Need a small block water pump recommendation [Re: 471Magnum] #992959
05/16/11 10:03 AM
05/16/11 10:03 AM
Joined: Oct 2003
Posts: 11,678
W. Kentucky
justinp61 Offline
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W. Kentucky
I use a FlowKooler pump on my 550 hp 408 and have no cooling issues.

Re: Need a small block water pump recommendation [Re: justinp61] #992960
05/16/11 10:59 AM
05/16/11 10:59 AM
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Posts: 2,325
Löffingen, Germany
The_Mean_Machine Offline
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Quote:

I use a FlowKooler pump on my 550 hp 408 and have no cooling issues.




same here..., no further mods equired.

Re: Need a small block water pump recommendation [Re: justinp61] #992961
05/16/11 11:05 AM
05/16/11 11:05 AM
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Posts: 1,009
Richmond Twp. Mi.
Mr340 Offline
super stock
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Richmond Twp. Mi.
I used the one spec'd for cop car apps. I think its a max cooling package part. the main visual diff is the shaft dia. 5/8" vs 1/2". It always kept my 340 cool , stop and go woodward cruise or on the highway @ 70 , 80 or more.

Part #4728533. don't know if it's still ava.

I'm using a Milidon hv pump on my 416 , it does ok but the temp seems to creep at highway speeds.

Re: Need a small block water pump recommendation [Re: The_Mean_Machine] #992962
05/16/11 12:44 PM
05/16/11 12:44 PM
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Space Station #5
471Magnum Offline OP
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I had a brand new FlowKooler puke all over my freshly detailed big block.

Never again.


-Jim

I can fix it... my old man is a television repairman.
He's got the ultimate set of tools... I can fix it.

Currently Mopar-less
Re: Need a small block water pump recommendation [Re: 471Magnum] #992963
05/16/11 01:11 PM
05/16/11 01:11 PM
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Posts: 3,445
N.Wilkesboro,NC
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DusterKrazy Offline
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Get a cheap a/c water pump and put the cavatation plate on it. Way cheaper and works just as good as the high dollar pumps. Been there, done that-bought the t shirt.

Re: Need a small block water pump recommendation [Re: DusterKrazy] #992964
05/16/11 01:22 PM
05/16/11 01:22 PM
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Posts: 18,153
Mass
DAYCLONA Offline
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DAYCLONA  Offline
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Quote:

Get a cheap a/c water pump and put the cavatation plate on it. Way cheaper and works just as good as the high dollar pumps. Been there, done that-bought the t shirt.







.....although I'd buy a premium A/C rebuilt pump, and add the impeller plate,....I,ve had this same set-up on my Challenger T/A for about 20 years now

Re: Need a small block water pump recommendation [Re: DAYCLONA] #992965
05/16/11 01:37 PM
05/16/11 01:37 PM
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Posts: 3,719
Space Station #5
471Magnum Offline OP
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471Magnum  Offline OP
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Just ordered a Gates pump.

Re: Need a small block water pump recommendation [Re: 471Magnum] #992966
05/17/11 02:55 PM
05/17/11 02:55 PM
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Posts: 1,274
Ontario.Canada
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can.al Offline
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Ontario.Canada
..standard water pump is fine.
..get your pulley size correct
..8 vane ac or cop units use a small pulley
..6 vane units use a large pulley
i hope i got that right,but you get the idea.

Re: Need a small block water pump recommendation [Re: can.al] #992967
05/17/11 10:21 PM
05/17/11 10:21 PM
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Andrewh Offline
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Quote:

..standard water pump is fine.
..get your pulley size correct
..8 vane ac or cop units use a small pulley
..6 vane units use a large pulley
i hope i got that right,but you get the idea.




you got it backwards.

6 vane a/c small pulley.

8 vane without a/c larger pulley.

Re: Need a small block water pump recommendation [Re: Andrewh] #992968
05/17/11 10:29 PM
05/17/11 10:29 PM
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Posts: 36,040
Lincoln Nebraska
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RapidRobert Offline
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Lincoln Nebraska
Quote:

6 vane a/c small pulley.
8 vane without a/c larger pulley.


OE Correct and 8 vane/small pulley w anti cav plate/adjusted distances on both sides of the vanes gives the best of both worlds


live every 24 hour block of time like it's your last day on earth
Re: Need a small block water pump recommendation [Re: RapidRobert] #992969
05/17/11 11:40 PM
05/17/11 11:40 PM
Joined: Jan 2008
Posts: 299
East Brunswick, NJ
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finadk Offline
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East Brunswick, NJ
I went with a Flow Kooler Part # 1700. As advertised it should address any problems with my underdrive March Pulleys. Got it from Summit. Im still assemblying the engine so cant say for sure but I have high hopes.


Scott 1956 Dodge Custom Royal Lancer (408 Stroker, 4 Wheel Disc Brakes, Rack & Pinion, 6 speed) 2002 Dodge Ram 1500 Quad Cab 1976 Corvette
Re: Need a small block water pump recommendation [Re: finadk] #992970
05/18/11 12:01 AM
05/18/11 12:01 AM

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Anonymous
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Diplomat cop units have a bigger main 5/8 shaft (turned down on the end for the pulley) and have ribs instead of the holes that a standard pump has.







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