help with overheating pump

[Method]

I have a waterbottle 'windscreen washer bottle' from the same car as what i
have, which i am using to create a spray for my intercoolers. i.e you flick
an on switch and instead of it spraying my screen it sprays my intercoolers.
The only problem so far is that the two little pumps which connect to the
waterbottle which pump the water to the little spray nozzles heats up really
quickly. After about 30s of continuous use its too hot to touch. Is there a
way i can reduce the power going to it without knowing how much the voltage
drop across the pump is etc? I tried connecting a 360ohm resistor in line
with the +ve before it gets to the pump and it didn't even turn on. There is
no markings or spots to check anything with a multimeter on the pumps. All
you can do is follow the wires into the pump and then see the water tube
from the bottom of it. How can it make it run cooler?
Thanks

 

[Rheilly Phoull]

I have a waterbottle 'windscreen washer bottle' from the same car as what i
have, which i am using to create a spray for my intercoolers. i.e you flick
an on switch and instead of it spraying my screen it sprays my intercoolers.
The only problem so far is that the two little pumps which connect to the
waterbottle which pump the water to the little spray nozzles heats up really
quickly. After about 30s of continuous use its too hot to touch. Is there a
way i can reduce the power going to it without knowing how much the voltage
drop across the pump is etc? I tried connecting a 360ohm resistor in line
with the +ve before it gets to the pump and it didn't even turn on. There is
no markings or spots to check anything with a multimeter on the pumps. All
you can do is follow the wires into the pump and then see the water tube
from the bottom of it. How can it make it run cooler?
Thanks

Probably not a good idea to run such continously since they are
'intermittent ' rated. If you want to persist on that it will be a matter of
finding the right size resistor, try a 5 ohm 5w or one salvaged from a
heater fan.
There are plenty of 12v units on the market (for fountains) at a reasonable
price, mebbe try one of them ?? since they would probably run for longer
before overheating. Look for one that does not run submerged.

 

[Rob]

I have a waterbottle 'windscreen washer bottle' from the same car as what i
have, which i am using to create a spray for my intercoolers. i.e you flick
an on switch and instead of it spraying my screen it sprays my intercoolers.
The only problem so far is that the two little pumps which connect to the
waterbottle which pump the water to the little spray nozzles heats up really
quickly. After about 30s of continuous use its too hot to touch. Is there a
way i can reduce the power going to it without knowing how much the voltage
drop across the pump is etc? I tried connecting a 360ohm resistor in line
with the +ve before it gets to the pump and it didn't even turn on. There is
no markings or spots to check anything with a multimeter on the pumps. All
you can do is follow the wires into the pump and then see the water tube
from the bottom of it. How can it make it run cooler?
Thanks

Would a throttled bypass line from the pump outlet back to the reservoir
help? If this allowed sufficient flow to the intercoolers and allowed the
motors to run at full speed they may run cooler.

Check out "The 12V Shop" they have some good water pumps - not sure on
sizing - would probably empty the reservoir in a few seconds...............
http://www.12volt.com.au/


rob

 

[James Horne]

I have a waterbottle 'windscreen washer bottle' from the same car as what i
have, which i am using to create a spray for my intercoolers. i.e you flick
an on switch and instead of it spraying my screen it sprays my intercoolers.
The only problem so far is that the two little pumps which connect to the
waterbottle which pump the water to the little spray nozzles heats up really
quickly. After about 30s of continuous use its too hot to touch. Is there a
way i can reduce the power going to it without knowing how much the voltage
drop across the pump is etc? I tried connecting a 360ohm resistor in line
with the +ve before it gets to the pump and it didn't even turn on. There is
no markings or spots to check anything with a multimeter on the pumps. All
you can do is follow the wires into the pump and then see the water tube
from the bottom of it. How can it make it run cooler?
Thanks

Why do you want to run it continuously? You must have a bloody big washer
bottle, and from experience results in a lot of steam coming from under the
bonnet and a puddle on the ground. Why not connect it via a microswitch
mounted on the throttle so that the sprays only operate beyond a certain
throttle position, or attach it to the wastegate actuator so that only
operates under full boost.

James

 

[Method]

I am planning on getting a switch which will allow it to automatically
operated depending on the boost/temp of the intercoolers. But say if i was
at calder park or on a track it would be on for quite some time.

 

[Ralph]

If you are drag racing it should be on for 10 seconds or so until the finish
line.
If you are circuit racing it will be on and off.

 

[pcman]

if you where at calder park you wouldnt be allowed on the track intercooler
spray units arnt allowed and wont pass scretennering that is assuming
your going to the offstreet drags

cheers
pcman

 

[Bushy]

Either upgrade to a better pump or mount them so they have a heatsink. Could
be as simple as a bit of aluminium and a hose clamp to hold it in place on
the pump's metal body.

An "in tank" fuel pump would allow the water reservoir to provide some
cooling to the pump, but would the few degrees rise in water temperature
affect the amount of cooling at the intercooler?

Peter

 

[Method]

It may, but i am guessing that when the water evaporates on the intercooler
it will most likely be cooler than that in the tank.
Thanks for all of your replies Ill revise it and give it a go.