Greddy electronic boost controller help

[tek9]

I think a screw fell out which is causing me not to build past 1-2lbs of boost if ANY..
if anyone has one of these boost controllers and can help it would be greatly appreciated.. i am posting a pic so u can see what im talking about, you can see the white thread tape, but the screw is gone, just wanna make sure one goes there.. i thought maybe my tial wastegate was stuck open or closed but when i push the wastegate in, i can hear air sucking in through that screw hole.

 

[oldman420]

man all you need is thread pitch and bore size in mm and any good bolt store will have a set screw to fit in there, notch it on top so you can take it out with a flat head put some teflon on there and away you go.

 

[tek9]

man all you need is thread pitch and bore size in mm and any good bolt store will have a set screw to fit in there, notch it on top so you can take it out with a flat head put some teflon on there and away you go.

thank you

 

[EPA nightmare]

If that mbc is hooked up to the compressor side then it definatly needs a screw in there or it's just a massive boost leak. Check to see what thread pitch it is, looks almost like you could find a set screw with fine pitch. Put a notch in it and good to go.

If you plug the hole in Electronic Boost Control Solinoid, boost will difinitely go up, proably uncontrolably. If a plug was required, then it would be included in the kit, and listed in the Instructions.
If you really want to plug the hole, it should be 1/8 npt.

 

[tek9]

If you plug the hole in Electronic Boost Control Solinoid, boost will difinitely go up, proably uncontrolably. If a plug was required, then it would be included in the kit, and listed in the Instructions.
If you really want to plug the hole, it should be 1/8 npt.

ok i am confused now, is there supposed to be a screw / bolt in that hole or not? im using an external wastegate..

 

[EPA nightmare]

ok i am confused now, is there supposed to be a screw / bolt in that hole or not? im using an external wastegate..

No plug is requiered or should be used. I was just pointing out the size of the fitting used. Plugging the hole would not allow the solinoid to vent any pressure, thus would have no effect on boost control.

 

[oldman420]

Why would the solenoid need to vent pressure, dude i think your screwed up. How are you supposed to build pressure, your ebc doesn't vent anything, thats the job of your B.O.V and wastegate to decide your boost pressures. Also if he read the instruction before he gave you wrong advice he'd see that the "NO" port is only used in internally wastegated applications. You should be using the "NC" & "COM" ports and plugging the "NO" port. His instructions are good but unfortunately you both failed to read them

 

[oldman420]

I will give you the fact that it says remove all plastic plugs from the valve unit, but that just seems wrong to me becuase how do you build pressure with a giant hole in your compressor side. Worst comes to worst you see it spike up past what you have it set up at. All you do if this happens is by-pass the ebc completely and run a line from the nipple on the compressor side of your turbo to your wastegate.

 

[EPA nightmare]

Why would the solenoid need to vent pressure, dude i think your screwed up. How are you supposed to build pressure, your ebc doesn't vent anything, thats the job of your B.O.V and wastegate to decide your boost pressures. Also if he read the instruction before he gave you wrong advice he'd see that the "NO" port is only used in internally wastegated applications. You should be using the "NC" & "COM" ports and plugging the "NO" port. His instructions are good but unfortunately you both failed to read them

Please reread my post and the instructions. I'm not here to disiminate false information.

This EBC uses a PWM (pulse width modulated) solenoid to vary the pressure between the inlet and outlet of the solenoid. It can only reduce the pressure signal. The reason for the differing inlet and outlet configeration is because of how the two different waste gates differ in operation.. An internal wastegate requires a reduction in the pressure signal to increase boost pressure. An external wastegate requires the opposite, an increase in the pressure signal to increase the boost pressure. When setting up this boost controler for an external wastegate, the pressure signal enters the EBC solenoid in the N.C (normally closed) port. In its off position, the solenoid will close off the N.C and connects the COM port to the N.O. (normally open) port. In this state, no pressure signal will reach the wastegate actuator, and will result in the base boost pressure determined by the pressure of the internal spring in the wastegate. When the solenoid is energized, the N.C. port opens and the N.O. port closes allowing the pressure signal to reach the wastegate. By varying the duty cycle of the solenoid, the boost controller can vary the pressure signal reaching the wastegate actuator. If you tried to block of the N.O port on the EBC solenoid, then none of the pressure signal could be vented. This would cause the pressure signal on both sides of the EBC solenoid to become equal, and would result in uncontroled boost pressure, as the controler would have no way to reduce the pressure signal.
Hope this helps to clarify things a little.

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Which Greddy EBC are you running? I'm running a Greddy PRofec B spec 2, And nothing go's in the empty hole on the boost control solinoid. I'm assuming from from your installation pitures that you're running an external wastegate. Boost pressure comes in the NC (normally closed) port, and the wastegate is hooked up to the COM port on the control solinoid. The extra port is the N.O. (normally open) port, and is used to exhaust pressure as the solinoid is cycled. One port has to be open for this solinoid to work. Boost pressure is controled through verying the duty cycle of the solinoid and thus how much pressure is applied to the wastgate. I think you might have the hose swapped on the solinoid so that the boost signal is coming in through the COM port and exhausting through the N.O. port before it can build any pressure to act on the wastegate. Try swapping the vacuum lines on the solinoid and see if it works correctly. Here's a picture of the of solinoid on my car. (note, I run an internal wastegate, so the I use the COM and N.O. ports on the solinoid.)Hope this helps.

Installation Intructions

 

[oldman420]

Gotcha, so your saying his valve is failing because the solenoid isn't automatically closing as it should be.