That statement about a walboro being a noisy pump is DEAD wrong.....and i proved it with my s2k.

voltage "DIRECTLY" taken off the pump was reading 11.9-12.0 V.....when the alternator was chargeing 14V.....thats common with most 20-22 gague wires leading all the way back to the pump loosing voltage.....they are only designed to work on 12V anyway(which the stock fuel pump runs on)......thicker gague wire will not loose any current being wired directly off the battery leading straight to the pump....13.9-14.0 V read after being rewired triggered by a bosch relay and the fuel pump quit wineing "COMPLETELY".

As far as current affecting flow that is true....but most aftermarket pumps run on 14V.....so if the stock wireing can't flow it....the pumps are all going to wine.

 

My walbro is noisier when it is warmer than when itis cold. A nice hot AZ summe day and it sounds like a cheap fish tank pump. Nice cool winter day and you can not even hear it.

 

Well, you know best.

My comment about voltage not flowing was from Electrical Engineering Principles 101.

Voltage is 'pressure'. Current is 'flow'. When current flows, voltage drops. Sorry, can't explain it any more simply. Perhaps read a book on electronics.

As to your theory that seems to say '12V = noisy, 14V = quiet', well .

 

Did your 101 teach you about voltage drop and ampacity of wires? His point is valid from a electrical standpoint, and it is very common for hondas to rewire the pump. How it effects the noise, I'm not 100%, but motors tend to growl and whine when undervolted. The brushes are designed to jump from contact to contact at a certain speed.

 

as trbokev stated, mine will whine after prolong driving (over an hour or so).. or maybe my hearing just gets use to the sound inside the cabin and i hear it more. lol

 

Its WHINE.....wine is something you drink.


Just like BRAKES and breaks...


Small pet peeve

 

I'm not debateing current vs. Voltage here.......i stated i used thicker gague wire to increase flow capability and it worked.....it alowed the 14V to transfer from the alternator all the way back to the pump run directly off the battery. Somewhere in the stock 20-gague wireing it is restricting flow a bit. Thats all i proved here....is that with Walboro pump is not getting enough "Juice" with the stock wireing....therefor it whines.

 

I have an issue as well. Not sure if this is related to the fuel pump or not but my car smells like gas and its not the smell of a test pipe but rather a really strong smell of fuel.

Any ideas?

 

mine never was loud till one day at 120degrees in vegas...... ever since that day its been loud. off and on... empty is louder and a hot day is louder.

normal

-Greg

 

Well that fits with BC's hypothesis. On a hot day the wires to the pump have a higher resistance. If you've got 2V across the wires you've only got 12V across the pump.