hi all... quick question.... after sorting out my blown turbos the cars been a hoot to drive but yesterday we fitted an mbc to increase to boost a little.. was hoping for 12-13 psi but it seems itll only boost to 9 psi.. no matter what we do,have checked for boost leaks and cant find any so was wondering if anyone else has any ideas as to what could be wrong?????

forgot to mention that ive removed the stock solenoids and fitted the hose from the mbc where the stock solenoid piped up to the y-piece from the actuator..

is this correct????

or would i be better to remove the factory y-piece and just T into the pipe from the actuator???

did a little fact finding on the internet but lots of it just didnt make sense..lol.. must be getting old or something:)

i must be getting old, dont you mean ebc? sounds like its in safety mode. pos check for any fault codes.

Did you remove the factory boost jets? They sit in the y piece with the boost solenoids? If you have you will have to crack it up more than you expect. This is what changes the stock boost level from the waste gates rated 7psi to the 9psi it runs.

If you have no boost leaks, you haven't changed that and still can't make more than 9 I'd suggest you have done something wrong with the mbc fitting.

i must be getting old, dont you mean ebc? sounds like its in safety mode. pos check for any fault codes.

 

No, I'd imagine he means MBC. Nothing wrong with a manual boost controller, they're just not that accurate.

 

Does sound like your car is going into safety mode. If you've set what where you think 12-13 PSi is, as a reduced ratio, safety boost will be at about 9PSi (normalsafety boost Iis about 7PSi I think.

 

Check your connectors are clean for knock sensor, MAF and O2 sensors. Check the sensors are behaving as they should do via ConZult (if you can). Then make sure you also don't have any boost leaks.

Well. Been all over every hose associated with boost and intake and found nothing wrong. All clips nice and tight..

Will be checking for fault codes tomorow but as ive removed the stock boost solenoids im unsure ifit would be in safe boost mode??

Also im going to removed the stock metal y-pipes and just have 1 hose from actuator and ill T into that for the mbc..

Was told earlier that i need 2 mbc's for it to work?? Cant see why 2 mbc wouldnt work both but thought id just ask??

Well. Been all over every hose associated with boost and intake and found nothing wrong. All clips nice and tight..

Will be checking for fault codes tomorow but as ive removed the stock boost solenoids im unsure ifit would be in safe boost mode??

Also im going to removed the stock metal y-pipes and just have 1 hose from actuator and ill T into that for the mbc..

Was told earlier that i need 2 mbc's for it to work?? Cant see why 2 mbc wouldnt work both but thought id just ask??[/QUOTE]

 

rubbish....Boost lines from front pipes (throttle bodies ones) into a T piece then the single pipe to boost controler... small 4"single pipe tail from other side of boost controler going into a T piece then down to actuators. Little hint...try make all pipe work to and from boost controler equal length

Well. Been all over every hose associated with boost and intake and found nothing wrong. All clips nice and tight..

Will be checking for fault codes tomorow but as ive removed the stock boost solenoids im unsure ifit would be in safe boost mode??

Also im going to removed the stock metal y-pipes and just have 1 hose from actuator and ill T into that for the mbc..

Was told earlier that i need 2 mbc's for it to work?? Cant see why 2 mbc wouldnt work both but thought id just ask??[/QUOTE]

 

rubbish....Boost lines from front pipes (throttle bodies ones) into a T piece then the single pipe to boost controler... small 4"single pipe tail from other side of boost controler going into a T piece then down to actuators. Little hint...try make all pipe work to and from boost controler equal length