Anyone tried electric water pumps?
Discussion
As per the title - has anyone tried electric water pumps rather than the mechanical pump?
It seems that when the car is idling in traffic and therefore the water flow through the pump is at its least is when the car gets hottest so I was thinking as to whether it would be feasible to use an electric water pump instead?
It seems that when the car is idling in traffic and therefore the water flow through the pump is at its least is when the car gets hottest so I was thinking as to whether it would be feasible to use an electric water pump instead?
Very popular with drag racers.
After the burnout, as you pull up to stage the car, you cut the feed from the alternator to the battery.
Between the lack of mechanical pump, and no drain on the alternator, you can gain 20+hp at top revs, or so it was reckoned.
I don't think I would have relied upon mine for full time use - I changed before going to the track, and reverted after the races.
Derek should be your man for this one. I'd be surprised if he hadn't studied this option.
After the burnout, as you pull up to stage the car, you cut the feed from the alternator to the battery.
Between the lack of mechanical pump, and no drain on the alternator, you can gain 20+hp at top revs, or so it was reckoned.
I don't think I would have relied upon mine for full time use - I changed before going to the track, and reverted after the races.
Derek should be your man for this one. I'd be surprised if he hadn't studied this option.
Hmmm ... Seems that my mate who races Skylines has just taken the electric water pumps off his race car as they weren't powerful enough under load. Apparently the quoted flow rates are for zero back pressure and fall of drastically as the pressure rises.
Been told that the guideline is you need 'hp/3' real litres/min (i.e. installed flow not free flow) otherwise you'll get overheating (as a rule of thumb).
Been told that the guideline is you need 'hp/3' real litres/min (i.e. installed flow not free flow) otherwise you'll get overheating (as a rule of thumb).
Bassfiend229hp said:
As per the title - has anyone tried electric water pumps rather than the mechanical pump?
It seems that when the car is idling in traffic and therefore the water flow through the pump is at its least is when the car gets hottest so I was thinking as to whether it would be feasible to use an electric water pump instead?
Isn't the water pump that's the problem. It's getting hotter but not over-heating?It seems that when the car is idling in traffic and therefore the water flow through the pump is at its least is when the car gets hottest so I was thinking as to whether it would be feasible to use an electric water pump instead?
Thermostat opens and allows flow through the radiator. Radiator can't cool water enough because there is no air-flow over the rad. The fans cuts in at 90 degrees to remedy the situation. Having more flow on the coolant system won't make much difference.
Therefor, the car gets hotter not because of the flow of the pump, but because of reduced flow over the radiator in traffic conditions.
Wouldn't worry about it unless it's going well over 90 tbh.
If you're paranoid, you could add a manual over-ride for the fans.
Edited by Meths on Tuesday 23 April 00:00
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