3-Port Boost Solenoid vs MBC
Nov 30, 2009, 03:15 PM
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3-Port Boost Solenoid vs MBC
I have looked at several posts discussing a 3-port boost solenoid, and how it is a better alternative to stock configuration. 
I am not exactly sure on what is controlling boost with this item.
Is the ECU? Can you use a manual controller with a 3-port? Which one is better at there job?
Both are about the same price.
I am not exactly sure on what is controlling boost with this item.
Is the ECU? Can you use a manual controller with a 3-port? Which one is better at there job?
Both are about the same price.
Nov 30, 2009, 03:26 PM
#2
Sigh...
It controls boost better because it is more precise at controlling boost because it can eliminate all pressure getting to the WGA. The longer there is no pressure getting to the WGA the longer it stays closed. The stock system leaks more pressure into the WGA and thus it opens earlier and you loose boost pressure.
Yes, ECU controls the boost using a 3 Port. Yes it is better than a manual boost controller.
It controls boost better because it is more precise at controlling boost because it can eliminate all pressure getting to the WGA. The longer there is no pressure getting to the WGA the longer it stays closed. The stock system leaks more pressure into the WGA and thus it opens earlier and you loose boost pressure.
Yes, ECU controls the boost using a 3 Port. Yes it is better than a manual boost controller.
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Dec 2, 2009, 08:10 PM
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I have the Perrin. My tuner vented it to atmosphere...makes a mean clicking sound at idle. You'll like having a 3-port.
Last edited by mlomker; Dec 2, 2009 at 08:13 PM.
Dec 2, 2009, 08:51 PM
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I have one... seems to be very consistent even at high elevation.
Actually it's custom-made for them... and the solenoid is just of the correct resistance, there is no resistor in line. It measures about 25 ohm IIRC.
Actually it's custom-made for them... and the solenoid is just of the correct resistance, there is no resistor in line. It measures about 25 ohm IIRC.
Dec 2, 2009, 09:01 PM
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Fact of the matter is that it controls my boost curve just fine, consistently. What else matters? You're not talking to some guy who pays somebody to tune his car, I datalog and tweak things almost every day of the week. This boost controller works fine. There's nothing wrong with the GrimmSpeed EBCS and it's completely worth the ~$100 price tag for being plug-and-play.