MBC not working? overboosting - 3000GT/Stealth International Message Center

993kgtSL · 05-09-2008, 12:19 PM

so i bought a MBC off of ebay which the person in this thread did too
Correct Setup for Ebay MBC

I installed it just like he did and now my car overboosts. is the inner part of the boost controller supposed to be open?

this isnt your standerd ball and spring MBC theres a special T that came with the kit. please help me out

chrisVR-4 life · 05-10-2008, 08:13 AM

The only thing I can say is that you should go buy a brand name boost controller that you know will work. I have had nothing but problems with ebay boost controllers because of their design. Even though it came with that t fitting it should still be a ball-spring boost controller and since yours is completely open that is allowing the wastegate to open freely which could be causing your overboost problem.

993kgtSL · 05-10-2008, 04:41 PM

ok i took the T apart and it appears to be a ball and sping built into the T. I have no idea how to get this crap to work

.

also does it matter how long the vacuum lines are between the waste gates?

right now one is longer than the other. Im going to buy so extra vac. line and run both of them the same.

what about the other threads setup for the MBC. why is one side of the BC open? wouldnt that just cause a vac. leak

ArmyVR4 · 05-10-2008, 07:32 PM

you want as equa;l as possible they say, but buy a brand name one i bought one off ebay, went to dyno it and it wouldnt go over wastegate boost.

05-09-2008, 12:19 PM	#1 (permalink)
993kgtSL Forum Member Join Date: Nov 2006 Location: Irvine Drives: 3000gt SL Trader Rating: (9)	MBC not working? overboosting so i bought a MBC off of ebay which the person in this thread did too Correct Setup for Ebay MBC I installed it just like he did and now my car overboosts. is the inner part of the boost controller supposed to be open? this isnt your standerd ball and spring MBC theres a special T that came with the kit. please help me out __________________

05-10-2008, 08:13 AM	#2 (permalink)
chrisVR-4 life New User - Please be kind Join Date: May 2008 Trader Rating: (0)	Re: MBC not working? overboosting The only thing I can say is that you should go buy a brand name boost controller that you know will work. I have had nothing but problems with ebay boost controllers because of their design. Even though it came with that t fitting it should still be a ball-spring boost controller and since yours is completely open that is allowing the wastegate to open freely which could be causing your overboost problem.

05-10-2008, 04:41 PM	#3 (permalink)
993kgtSL Forum Member Join Date: Nov 2006 Location: Irvine Drives: 3000gt SL Trader Rating: (9)	Re: MBC not working? overboosting ok i took the T apart and it appears to be a ball and sping built into the T. I have no idea how to get this crap to work. also does it matter how long the vacuum lines are between the waste gates? right now one is longer than the other. Im going to buy so extra vac. line and run both of them the same. what about the other threads setup for the MBC. why is one side of the BC open? wouldnt that just cause a vac. leak

05-10-2008, 07:32 PM	#4 (permalink)
ArmyVR4 Forum user Join Date: Feb 2008 Location: sc/ia Drives: 96 vr4 Trader Rating: (5)	Re: MBC not working? overboosting you want as equa;l as possible they say, but buy a brand name one i bought one off ebay, went to dyno it and it wouldnt go over wastegate boost.

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