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Planet-9

Electric Water Pumps

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6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHElectric Water Pumps

Leading reported evidence

Replace regular water pumps in cars at less than

Performed · outcome unconfirmed

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

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Performed · outcome unconfirmed

I've replaced regular water pumps in cars at less than that.

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Electric Water Pumps
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Leading evidence: 'Replace regular water pumps in cars at less than' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace regular water pumps in cars at less than' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 6 captured posts examined · 1 partial discussions

Compare 3 other evidence results

Run off a pulley, at some reduced ratio

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
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Suggestion

Help me understand this: doesn't the alternator simply run off a pulley, at some reduced ratio to crank speed?

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Electric Water Pumps

Run pump

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No successful repair reported for this finding.

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

It still takes HP to run the pump, it just doesn't come directly from the crank.

Original post Read captured discussion
Electric Water Pumps

Run pump.* there is no free lunch

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes
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Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The engine must turn the alternator harder to generate the electricity needed to run the pump.* There is no free lunch.

Original post Read captured discussion
Electric Water Pumps
Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Replace regular water pumps in cars at less than

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed

I've replaced regular water pumps in cars at less than that.

Original post Read captured discussion
Electric Water Pumps

Run off a pulley, at some reduced ratio

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Help me understand this: doesn't the alternator simply run off a pulley, at some reduced ratio to crank speed?

Original post Read captured discussion
Electric Water Pumps

Run pump

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

It still takes HP to run the pump, it just doesn't come directly from the crank.

Original post Read captured discussion
Electric Water Pumps

Run pump.* there is no free lunch

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The engine must turn the alternator harder to generate the electricity needed to run the pump.* There is no free lunch.

Original post Read captured discussion
Electric Water Pumps
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Planet-9: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T020439Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Anyone have experience with Meziere pumps? http://www.meziere.com/index.php typically lighter than stock pump, and takes no HP from the crank since its electric.

POST 2Original post

These pumps are great for race cars that get a lot of maintenance, but are not really practical for a street-driven car. A couple of points to consider: 1. It still takes HP to run the pump, it just doesn't come directly from the crank. The engine must turn the alternator harder to generate the electricity needed to run the pump.* There is no free lunch. 2. These pumps are not as durable as a normal, engine-driven water pump. 2400 hours rated lifespan is only a couple of years of normal driving. * The electric pump is "HP-free" only when run in dragsters or other race vehicles with a "total loss" electrical system -- meaning that they don't have an alternator, and only run off the battery (the battery is charged by an external charger before the race). This would not be practical in a street-driven car.

POST 3Original post

Thanks for the explanation. They were a popular mod on the Mustangs. I'll just have to keep looking for a free lunch somewhere else

POST 4Original post

Help me understand this: doesn't the alternator simply run off a pulley, at some reduced ratio to crank speed? How then do the engine "turn" the alternator harder? How is that manifested? The alternator does not increase its load on the engine. As to life span at 2400 hours or so: Over past 3000 miles, I averaged 42mph. Call is 40mph. So that 96,000 miles or so. I average 12k miles a year, so that's 8 years. That's fine with me. I've replaced regular water pumps in cars at less than that. And if that gets me 5hp or so, then its not free, but its a low cost mod.

POST 5Original post

There is great energy lost in turning mechanical energy (crank) into electricity (battery) and turning electricity back into mechanical energy (electric alternator) If you do regenerative braking then that's another story... Most of the energy lost in the engine is in heat. There is free energy waiting for you to harness at the exhaust pipe The most easy thing to do is an under drive pulley with relative low risk. It is simple with less thing going wrong.

POST 6Original post

Thanks for the detailed explanations...very helpful. I have a bad DIY habit. But I will defer to the wisdom of Collective.

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