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tips, technology, tools and techniques related to vehicle driveline components

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roverman
Art Gertz
Winchester, CA.
(2860 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

That old 6v-71 blower
Posted by: roverman
Date: April 06, 2017 07:09PM

Swapmeet core kinda thing. I would "like" to use as a hi-volume water pump. How crazy is this ? Should move LOTS of water-right ? Thanks, art.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: That old 6v-71 blower
Posted by: BlownMGB-V8
Date: April 07, 2017 10:15AM

That's pretty far out in left field Art, you might want to bring it in a bit. Not that it won't work but air and water are a lot different when you start talking about moving that much of it. Big water pumps are almost always centrifugal because it is a lot more efficient to use the weight of the water to move it than to physically displace it. Turbulence and cavitation problems are bound to crop up, and the housing is not made to stand up to that kind of abuse. Neither are the drive gears. Yes, it'll work, and if you were on a desert island and that's all you had to work with it'd be brilliant. But...

Jim


joe_padavano
Joseph Padavano
Northern Virginia
(111 posts)

Registered:
02/15/2010 03:49PM

Main British Car:
1962 F-85 Deluxe wagon 215 Olds

Re: That old 6v-71 blower
Posted by: joe_padavano
Date: April 08, 2017 11:38AM

This is a really, REALLY bad idea.

Air is compressible, water is not. You will note that the clearances in a water pump are MUCH larger than in a lobe-style compressor. Water pumps are typically centrifugal or screw type, not positive displacement like a lobe-style blower. Try to pump water through this and the broken parts and carnage will be impressive. Please video the attempt.


roverman
Art Gertz
Winchester, CA.
(2860 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: That old 6v-71 blower
Posted by: roverman
Date: April 10, 2017 06:37PM

Ok, It needs to be in a movie and then the "impossible science team" will attempt to duplicate ?


Nexxussian
Erik Johnson
Alaska
(62 posts)

Registered:
04/20/2015 10:32PM

Main British Car:
1974, MGB, Citroen Color Rover V8

Re: That old 6v-71 blower
Posted by: Nexxussian
Date: May 23, 2017 04:02AM

If you want a roots style water pump, I would look at dry sump pumps.

Some of the high dollar brands (Daley engineering, I think amongst others).

Of course those are dealing with partial flows, part oil, part air and whatever combustion gasses are in the crankcase, so I'm unsure how that would work without the compressible nature of the scavenge flows.

Would a gerotor or vane pump better fit your application?

They are already liquid pumps.

Is there a specific engine speed range you are looking for more flow?

Flow Kooler makes pumps that are better at low speed.

I forget if it's Mezeire or CSR, but they make a high pressure belt drive water pump, you could run one in addition to the stock water pump, in series for more pressure, in parallel for more volume, depending on what you're after.

Of course you could run any external pump that way as well.


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