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Today I wired up my 1 1/2 quart Moroso accumulator with electric valve. I spliced into the power mirror wire (constant 12v) and put the toggle switch in the panel next to the mirror adjustment knob.
I've got 12v to the valve on the body of the accumulator but I don't think it's opening. Am I right in thinking that I should see pressure when I flip the switch with the key off? Right now, nothing's happening. My ground "appears" to be good...I scraped the paint and checked for tightness.
Anything jump out at you?
Randy
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there are three terminals on the Moroso Electric Valve
2 on the solenoid itself and 1 on the solenoid bracket.
The power wire goes to the 12v terminal (as I assume you already have it)
the remaining two terminals must BOTH be tied to ground, this is easily accomplished by tying the two together with a jumper wire and then running a single wire to ground, but you can run full wires to the ground point for both otherwise, same thing either way.
If you start the car and run it for a bit (rev it a little too) so that the accumulator has a decent amount of pressurized oil in it, after you shut the car off you will be able to turn it on and watch the gauge reflect the repressurization of the system. (assuming of-course your gauge is mechanical or electric with power to it)
BTW, I recommend that after filling your oil pan with the proper amount of oil for the whole system, you pull the dip stick and scribe a new line for full to reflect normal full plus the accumulator oil. Then whenever you decide to check your oil, turn the accumulator switch on and let the car sit for 10-15 min to ensure all the oil has drained back into the pan, this will allow for the most accurate monitoring of system oil level.
Last edited by Pope; 06/26/05 06:07 AM.
87 Mustang GT 5.0L TURBO
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Hi Joe,
Well it seems that I've got it wired correctly. I have both of the grounds run together to a chassis ground. I probably don't have enough pressurized oil in it though. Will it fill regardless of what the air pressure gauge is set to? This is something I really don't understand. 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?
Today, I will drive around with the valve open but what should I do with the air pressure? 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)? 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?
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.
Randy
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!
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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.
Quote:
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.
Quote:
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.
Quote:
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.
Quote:
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
Quote:
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.
Quote:
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
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Damn....very nice Joe!
Thanks for all your work putting that together. I didn't get a chance to drive it yesterday. After I get to work later today, I'll see if it's working properly.
Randy
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Drove in to work yesterday and while on the highway at about 40-45 psi, I shut off the accumulator (I turned it on upon leaving my house). Got to work, turned the car off and then flipped the accumulator switch back on and nothing registered on the oil pressure gauge. After sitting overnight (I work at a fire station), I flipped the switch on this morning before starting the car and still saw nothing from the gauge  . The air pressure in the accumulator is down around 10psi. Quote:
Assuming the valve is on the accumulator in the correct direction
What would it look like if it were on the wrong way? It very well could be but it looks like it only goes on one way...with the wires leading out and away from the body of the accumulator.
Randy
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the problem is that the solenoid assembley on the valve can be rotated 360 degrees without it affecting anything.
start the car up, turn the valve on, rev the motor to raise the oil pressure, then shut the motor off while watching the gauge, the oil pressure should fall slowly while the accumulator empties. (leave the accumulator on)
edit:
I just checked, the valve should have "in" and "out" cast into it. the side labled "in" should be the side of the valve connected to the accumulator.
Last edited by Pope; 06/28/05 08:37 PM.
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Very informative.
I just had a 2 quart Accusump installed.
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