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Old 11-14-2006, 03:00 AM   #1
cbourbs
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Default i heard you have to purge meth sytems?

do you have to purge meth systems every time you use it, or is it just when you park the car in the winter? Or can you just use it without doing that, i heard it was corrosive!!!
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Old 11-14-2006, 11:32 AM   #2
Ultimate Collision Center
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Its nice to purge the unit but is not 100% necessary, I don't have a purge on my system, just before I do a WOT pull I do a couple runs where I build enough boost to prime the lines...
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Old 11-14-2006, 05:44 PM   #3
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Recently I have noticed that when I start my car if I slam the gas my flow light doesn't light up right away. This has never happened before. Is it a winter thing? Are there aftermarket purge things that can be installed? I worry casue if I am at the track and my car sits in the stage lanes the lines will not be purged by the time I get to the line.
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Old 11-15-2006, 04:52 PM   #4
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Quote:
Originally Posted by kn0bby8 View Post
Recently I have noticed that when I start my car if I slam the gas my flow light doesn't light up right away. This has never happened before. Is it a winter thing? Are there aftermarket purge things that can be installed? I worry casue if I am at the track and my car sits in the stage lanes the lines will not be purged by the time I get to the line.
Test button?
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Old 11-16-2006, 07:39 AM   #5
hippy
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Quote:
Originally Posted by kn0bby8 View Post
Recently I have noticed that when I start my car if I slam the gas my flow light doesn't light up right away. This has never happened before. Is it a winter thing? Are there aftermarket purge things that can be installed? I worry casue if I am at the track and my car sits in the stage lanes the lines will not be purged by the time I get to the line.
The only reason an n2o kit needs to be purged a lot is cause the tank is constantly being turned on and off. With a water injection system that has a solenoid or check valve, purging the system should only have to be done when the kit is first installed, and if the tank runs out of water. In all other situations, the tubing should already have water in it. Making a purge kit would not be an easy task with a pump controller based system. You'd need 2 solenoids, a switch, and a y fitting for the tubing that goes to the check valve. The the y fitting should be as close to the check valve as possible, and the switch should ground the pump and purge solenoid. The second solenoid(which stops flow of the system) would be turned on with a boost switch.

The flow light isn't hooked upto anything that detects flow. It's a light that's hooked upto a pressure sensor. Once the pressure goes above a given amount, the light goes on. The light doesn't turn on immediately because the pressure needs to build a bit first. If it's not happening as quick as before, you might wanna look into reasons why the pressure of your system wouldn't build as fast. Could have to do with the settings on your controller, the boost the car is running when the system kicks in(since your controller probably uses boost to dictate flow), and so on.

peace

Last edited by hippy; 11-16-2006 at 07:47 AM.
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Old 11-16-2006, 01:12 PM   #6
bcblues
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I was under the impression that it was, in fact, a flow sensor and not a pressure sensor. I could be wrong though. Hippy is right, you do have flow before the flow light comes on. It is just under the flow or pressure threshhold of the sensor.
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Old 11-16-2006, 03:02 PM   #7
kn0bby8
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Test button?
Coolingmist kit have no test button! I wonder why!
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Old 11-16-2006, 05:09 PM   #8
hippy
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Originally Posted by bcblues View Post
I was under the impression that it was, in fact, a flow sensor and not a pressure sensor.....
Coolingmist advertises it as a "clog nozzle/flow detector" when in reality it is a pressure sensor.

peace
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Old 11-16-2006, 05:19 PM   #9
CMTech
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Originally Posted by kn0bby8 View Post
Coolingmist kit have no test button! I wonder why!
Its not really necessary, however if you want one just do this:

1) get yourself a toggle switch.
2) take one end of the rocker switch and ground it to the chasis. Take the other end and hook to the ground wire of the pump leave that wire connected to the controller.
3) the trunk mount tank will never lose its prime unless it runs out of fluid.


When you turn the switch on it will make the pump and system work. You will want to make sure the switch is off while you are running the car.
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