Does anyone make an electric water pump for the /6?

Or convert the belt-driven pump to electric?

Or sell a kit for the conversion?

TIA

--Walt Jackson

Sorry, no electric water pump available for the slant. About the only thing you can do is get either a Mr.Gasket or Moroso electric drive kit and mount that up. I've heard that either will bolt on.

What I'd like to see is a slant w/p housing that can accept a B/RB pump.

Roger

Why would someone want an electric water pump? There is no increase in efficiency because you remove the load from the engine (no load on crank via the belt) but you add it to the alternator. Infact I bet you will even loose efficency because there is more energy lost in the motor windings then there is in the belt transfer system.

Electric fans gain you efficency because even though you add more draw on the alternator, you loose the drag that occurs on the fan (and hence the motor) at higher speeds due to increased wind flow.

I've thought about this several times, an electric fuel pump + electric fan + electric water pump do you gain, do you loose!?!?! I've seen many racers do it, so where's the catch?

Alex

One of the major catches with electric waterpumps is they cannot even come close to the volume a mechanically driven pump can produce. While an electric pump will outflow a mech. pump at idle, the electric pump will be far behind the mech pump once the rpms are brought up (say anything over 2000-2500 rpm).

If you have a well funtioning cooling system, the loss in coolant flow volume may not be an issue.

-S/6

Electric fans gain you efficency and power as I stated. Electric fuel pumps are used when increased pressures or volumes are needed, such as in TBI, especially MPFI, and boost applications.

Water pumps, thats what I'm trying to figure out. Perhaps at high rpm, powering the mecahnical water pump takes significantly more energy then an electrical one would drain out of the alternator. That would go along with Super6 idea that mechanical pump output at higher rpms is higher, but un-needed.

But is that extra flow truely un-needed? I have no idea. My slant might fare OK, simply because I have a truck, with a truck radiator (new), and my block was recently rebuilt so all the coolant passages are clean.

I remember looking for HP drag numbers for various accessories when I was constructing a serpentine system. Never found much, but IIRC we assumed a 12 HP draw from the waterpump (and fan) to calulate how much belt wrap there needed to be on the waterpump pulley. We ended up a little shy on the amount of belt wrap for the w/p pulley, and it has not slipped yet up to 5500 rpm (meaning it draws less than 12 HP). I also assumed that the fan is the major component of the HP loss to the w/p pulley. Based on that, I don't think the waterpump draws much more than 3-4 HP even at high rpm.

That begs the question of whether an electric drive w/p is really even worth it. For a drag car, where you want every last available HP, maybe. For a street rig, IMHO it is simply not worth the trouble.

Sorry for dragging this post off the original topic.

-S/6

In my situation, I think I have the best of both worlds. My Cuda has a belt driven electric fan and water pump. I have twin fuel injection fuel pumps, MSD ignition, and a nitrous bottle heater. This is a total amp draw of about 50-55 amps, in addition to lights if it is at night. I added a 110 amp alternator, with a field cutout relay, triggered by a micro switch on my throttle. Under all conditions except full throttle, the alternator supplies enough power to handle the load. At full throttle the field circuit is opened, and the alternator acts as a idler pulley, only, and does not take any horse power from the engine.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

I knew I saw this somewhere. Found this in Hemmings Rods & Performance. This might be a good alternative. Check this site www.daviescraig.com.au

Dart68

i use one of the davis craig electric water pumps(without the electronic controller)on my inline hemi 6(277 cu in)made 15 hp at the wheels, and i normally run it at half speed(as the engine has trouble heating up on full speed)and have a throttle trigger swich for full speed(when i'm giving it a rap out!)and an over ride switch for traffic jams)you'll never use a mechanical pump again after using one of these.(about $200 aus $$-120 us)they can be mounted anywere and they are connected with a flex rad hose

The above Davies Ewp link didn't work for me, so this one should:.

http://www.daviescraig.com.au/main/display.asp?pid=8

its pretty simple why someone would want an electric water pump IF they were racing the car... to be able to cool the car down between rounds. Much for effective than having to start the engine to move water for it just gain heat again when u shut it off... For racing yes, for typical driving, not the better way to go.

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Nick Bowman
1970 Plymouth Duster
14.00 @ 98 - 8.94 @ 80 (v-eight)
08 slant 6 rookie of the year

Thanks for the link, guys. I may try one of those pumps sometime.

buickroadster, did you use the "80" pump or the "115" pump?

Nick, nice to see you on the board. Are you thinking about a slant 6 build sometime?

Lou

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Home of Slant6-powered fun machines since 1988