ssrobss

Hey there new guy here hopefully can get some help I have a full zzp s256et kit.

My issue is that MBC not working can't turn up or down boost.

MBC- from lower tial mvs wastegate hose goes to zzp charge pipe then the line has a T that goes to MBC then arrow side of MBC runs to top of wastegate. (Springs inside gate are set to just over 24psi).

BOV- zzp 50mm hose goes to side port of bypass valve that's on upper intake manifold.

BYPASS VALVE ON INTAKE MANIFOLD-
Bottom port next to connector goes to intake manifold,side port goes to bov, top port has been left open not sure what goes there is anything. Also when connector is hooked up car make 22psi and holds when disconnected over 30psi. Not even sure if I'm suppose to use this bypass valve at all.

BOOST PRESSURE VALVE- came off factory turbo no hoses attached just open ports and plugged in kinda just hanging there.

Please someone help me!!!

jcalvin1126

I may be wrong but I had to run the boost controller to the bottom pot and vent the top port to atmosphere.

jcalvin1126

Ok so let me help you some here, as Im running a s257. I ran the stock boost controller to the side port of the wastgate, and vented the top port to air. For the BOV, which you should have with a 256 I ran a vacuum line from the intake manifold nipple to the top port on the BOV. I removed the BPV solenoid and the vacuum tank. I prefered the stock boost solenoid as it can be tuned for correct wastgate duty cycle rather then MBC where you tune around your own adjustments.

jcalvin1126

Here is my BOV hook up



And wastegate.

06_ion2

Picture of the boost controller?

The top one is used for a electric boost controller.

Use the side port for the line and put the boost controller on that. If it's the boost controller I'm thinking of turn it all the way to the - side while blowing into the port of it, arrow on the side shows airflow.