Originally posted by Randy Gunn:
Will it fill regardless of what the air pressure gauge is set to? This is something I really don't understand.



Technically yes, but it depends on system pressure. additional info follows.

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Per the Moroso instruction sheet, I filled the unit with 100 psi and bled it back down to 6 psi. Am I supposed to leave it at 6 psi? Does this represent the pressure that it will activate at? If so, this seems way too low. I would think if I were at a track event and experience a pressure drop, I would want it to work well above 6 psi, right?



Maybe this crude drawing will help



The 6psi in the accumulator when empty ensures that the piston inside travels all the way to the hose end. As the system fills the oil portion of the accumulator, the piston compresses the air chamber, the higher the system pressure, the more oil in the accumulator, the higher the pressure in the air chamber.

Anytime system pressure changes oil with either flow into or out of the accumulator depending upon the pressure gradient.


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Today, I will drive around with the valve open but what should I do with the air pressure?



All you have to do is leave it at 6psi when empty, the oil system will take care of the rest.

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When I'm heading back up my street I should turn the valve off before I get to my driveway and turn the key off, right (this will pre-load pressurized oil in the cylinder)?



Short answer: Yes.

Assuming the valve is on the accumulator in the correct direction, (forgive me I don't remember off hand which way that is) the valve lets oil into the accumulator even if the valve is closed, but it will only come back out when open.

If the valve is reversed it will empty whether or not the valve is on, but will only fill when open.

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Then, if all is working correctly, the next time I drive it I can turn the valve on before turning the key on and I should see the gauge pressure up?



Yes

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Also, how much travel does the valve body have between open and close? Right now it is resting in-line with the oil feed line. If it turns at full right angles to this line, I may not have enough slack in my two ground wires.



The valve itself doesn't actually move. It is magnetically operated, and during operation it essentially lifts an internal pin out of the way, letting the oil flow either direction.

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P.S.- I've been trying to get thru to Moroso Tech for a few days to get these questions answered but I've only been able to get past the busy signal once, and that was to leave a (non-returned) voice message. Thanks alot for your help here!



No problem. and your not the only one that has had a ridiculous time trying to get a hold of a tech. took me 7 calls, and a few hours worth of accumulated time before I was able to find out about which direction the valve goes. I'll be happy to help more if needed.


BTW, if you have everying else turned off in your car, and there isn't a lot of ambient noise, you can actually hear the valve open the instant you supply power to it. It should sound like a faint "thunk." If for some reason the valve still isn't opening, (don't base on wheter or not you hear the noise) to let the pressure out, double check the fuse for the mirrors to make sure it didn't blow. If it's 20amp it shouldn't blow just from turning the accumulator on, but it's still worth checking.

Last edited by Pope; 06/26/05 04:06 PM.
87 Mustang GT 5.0L TURBO