evo jason

I decided to throw on a Hallman Pro RX that I had laying around until I get a 3 port. I have it installed with no problems / no CELs, but I've got the boost turned all the way up to max and it's only getting up to 20 PSI before starting to taper off. I did accidentally partially unscrew one of the nipples trying to twist the vacuum line on and I just tightened it by hand, the instructions for changing springs mentions that using a wrench could over tighten it and damage the MBC. If that isn't the problem, I guess I will need to throw in the heavier spring, unfortunately I can't find it anywhere.

Can anyone who ran the Hallman Pro RX tell me if they had to switch springs to get stock boost levels as well? Or does it sound like I need to tighten the nipples into the MBC?


Edit: I tightened the nipple and still no improvement. Anyone want to sell me the heavy spring for a dollar?

jsmits2689

Yea I had to change mine out. The spring that comes in it is tiny compared to the other spring, probably half the size. Switched it out and I was good to go!

evo jason

I found the heavy spring, it was right in front of my face the whole time

Robevo RS

iTrader: (16)

There is no reason to have a mbc in the X.
Will do nothing more then a head ache. The X has finally a great quality boost control set up.
It is worth a money to making it better but the mbc will be actually a downgrade.
Change it back to the ecu controlled boost.

slacker126

Springs out of some pens seem to work really well...try different ones, you'll figure it out eventually, goodluclk

evo jason

Yep, I got the heavy spring working and set it to 22 psi, but it feels slower without the quick spike around peek torque that the stock boost control has. I'll be putting it back to stock today. Meh, it was worth a try.

Anarchy99

iTrader: (196)

yes you need the heavy spring

Robevo RS

iTrader: (16)

Search around about the 3 port solenoid valve that is a worthy upgrade +the waste gate actuator. Then you should be set for anything. Of course over 25 psi boost its a good idea to get a recirc bov too.

CJ2X

iTrader: (4)

Wow! Thanks to your thread, I just discovered an Epic Fail on my part. The same thing happened to me when I got tuned last summer. I didn't even know there was a heavy duty spring. I tapered at 19.8 psi. Here I was thinking that my MBC was a POS. Epic fail.



Kind of a bitter/sweet feeling.

kadir07

iTrader: (-1)

hey guys i have problem with my mbc its an hallman, my aftermarket psi gauge reads only 11psi when i floor it, it doesnt loose psi untill i **** tho, i turn up my mbc and still its 11 psi i tryed to run the car with out the mbc on the high way and i let the psi gauge go into boost and it was at like 21 psi and i let it go so i thought it was a mbc so i got another one and it was not the mbc, it was still doing 11psi. do u guys know what might be the problem i know its not a boost leak..

kadir07

iTrader: (-1)

shift***

evo jason

11 PSI is what you would get running just off the wastegate pressure, it sounds like you have it hooked up wrong.