Passive Boost Solenoid Emulator
Jan 28, 2005, 05:14 AM
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I am intersted in knowing what this is exactly. A mechanical add on or simply software to control the boost solenoid? I have the Xede (Stg 1+) and was wondering if this is something that is recommended as an added safety margin.
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May 24, 2005, 09:07 AM
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The boost control emulator isn't typically used with XEDEs since the XEDE drives the boost control solenoid directly and yields stable results. It is used primarily with ECU reflashes which rarely control boost well due to the nature of the underlying control parameters. In this case, this fitting takes the place of the boost control solenoid altogether, creating a controlled bleed and a perfectly smooth boost curve. There are two types of solenoids available, one for the 9.8 housing and one for the 10.5 housing.
For XEDE users, we have used the same emulator fitting to increase boost beyond/machanical bleed beyond what is capable with the factory solenoid and wastegate restrictor. We do this by adding the emulator in-line with the boost control solenoid. This alone bumps up boost by 2-3psi. It is used in applications where boost, for some reason, is lower than normal.
To see instructions/pics on how the emulator is fitting in both XFlash and XEDE applications, see:
http://www.vishnutuning.com/evo_install_pill.htm
Cheers,
shiv
For XEDE users, we have used the same emulator fitting to increase boost beyond/machanical bleed beyond what is capable with the factory solenoid and wastegate restrictor. We do this by adding the emulator in-line with the boost control solenoid. This alone bumps up boost by 2-3psi. It is used in applications where boost, for some reason, is lower than normal.
To see instructions/pics on how the emulator is fitting in both XFlash and XEDE applications, see:
http://www.vishnutuning.com/evo_install_pill.htm
Cheers,
shiv
May 24, 2005, 10:05 AM
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Originally Posted by shiv@vishnu
The boost control emulator isn't typically used with XEDEs since the XEDE drives the boost control solenoid directly and yields stable results. It is used primarily with ECU reflashes which rarely control boost well due to the nature of the underlying control parameters. In this case, this fitting takes the place of the boost control solenoid altogether, creating a controlled bleed and a perfectly smooth boost curve. There are two types of solenoids available, one for the 9.8 housing and one for the 10.5 housing.
For XEDE users, we have used the same emulator fitting to increase boost beyond/machanical bleed beyond what is capable with the factory solenoid and wastegate restrictor. We do this by adding the emulator in-line with the boost control solenoid. This alone bumps up boost by 2-3psi. It is used in applications where boost, for some reason, is lower than normal.
To see instructions/pics on how the emulator is fitting in both XFlash and XEDE applications, see:
http://www.vishnutuning.com/evo_install_pill.htm
Cheers,
shiv
For XEDE users, we have used the same emulator fitting to increase boost beyond/machanical bleed beyond what is capable with the factory solenoid and wastegate restrictor. We do this by adding the emulator in-line with the boost control solenoid. This alone bumps up boost by 2-3psi. It is used in applications where boost, for some reason, is lower than normal.
To see instructions/pics on how the emulator is fitting in both XFlash and XEDE applications, see:
http://www.vishnutuning.com/evo_install_pill.htm
Cheers,
shiv
Here's a question. What if you have a new MAS intake pipe that eliminates one of the solenoid hoses to the stock MAS pipe? In other words, there are 2 hoses that go to the wastegate solenoid. 1) is from the wastegate itself and 2) the other is from the MAS pipe that goes to the compressor. If you replace this pipe with a pipe that doesn't have a nipple to feed that hose to, then what? Does that hose just hang there?
-M
May 24, 2005, 11:50 AM
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Originally Posted by BOOSTEZ
Shiv,
Here's a question. What if you have a new MAS intake pipe that eliminates one of the solenoid hoses to the stock MAS pipe? In other words, there are 2 hoses that go to the wastegate solenoid. 1) is from the wastegate itself and 2) the other is from the MAS pipe that goes to the compressor. If you replace this pipe with a pipe that doesn't have a nipple to feed that hose to, then what? Does that hose just hang there?
-M
Here's a question. What if you have a new MAS intake pipe that eliminates one of the solenoid hoses to the stock MAS pipe? In other words, there are 2 hoses that go to the wastegate solenoid. 1) is from the wastegate itself and 2) the other is from the MAS pipe that goes to the compressor. If you replace this pipe with a pipe that doesn't have a nipple to feed that hose to, then what? Does that hose just hang there?
-M
May 24, 2005, 12:25 PM
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Originally Posted by shiv@vishnu
Why would any MAS pipe eliminate one of those ports?
-M
Jun 23, 2005, 11:27 AM
#12
Originally Posted by shiv@vishnu
For XEDE users, we have used the same emulator fitting to increase boost beyond/machanical bleed beyond what is capable with the factory solenoid and wastegate restrictor. We do this by adding the emulator in-line with the boost control solenoid. This alone bumps up boost by 2-3psi. It is used in applications where boost, for some reason, is lower than normal.
Cheers,
shiv
Cheers,
shiv
Jun 23, 2005, 11:54 AM
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Woo, my car is on the Vishnu website! http://vishnutuning.com/images/Random/kimboo.jpg It's blured in the background. 
Vishnu needs to give my friend (Jim Bob) credit for that amazing picture btw.
Vishnu needs to give my friend (Jim Bob) credit for that amazing picture btw.
Jul 7, 2005, 08:12 AM
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Originally Posted by BOOSTEZ
Shiv,
Here's a question. What if you have a new MAS intake pipe that eliminates one of the solenoid hoses to the stock MAS pipe? In other words, there are 2 hoses that go to the wastegate solenoid. 1) is from the wastegate itself and 2) the other is from the MAS pipe that goes to the compressor. If you replace this pipe with a pipe that doesn't have a nipple to feed that hose to, then what? Does that hose just hang there?
-M
Here's a question. What if you have a new MAS intake pipe that eliminates one of the solenoid hoses to the stock MAS pipe? In other words, there are 2 hoses that go to the wastegate solenoid. 1) is from the wastegate itself and 2) the other is from the MAS pipe that goes to the compressor. If you replace this pipe with a pipe that doesn't have a nipple to feed that hose to, then what? Does that hose just hang there?
-M
The reason that hose goes from the BCS to the Intake Pipe is for the same reason that your BOV recirculates. The air that comes out of the compressor cover goes two places, either A: goes to the wategate actuator and opens the wastegate, or B: goes to the BCS and gets bled off to the intake to let the wastegate stay shut. Either way, that air has been metered by the MAS prior to taking those paths, if the BCS bleeds to the atmosphere you are bleeding off air that was metered, and your car will run richer than if it was recirculated back to the intake. Mitsu was basically accounting for all the air that originally went through the MAS, that's why that air is recirculated post-MAS.
Basically if you use the Buschur pipe and don't find a way to recirculate that air you will have a slight rich condition. I think Buschur doesn't provide the nipple because he assumes most of his customers use MBC's or EBC's where that feature is no longer needed.
HTH
- Steve