hi guys! just installed the hallman mbc. followed the install in the how to's section. my 1st and 2nd gear are only boosting on 10-15 psi but on 3rd it goes to 20 then tapers down 18- 17...

just want some inputs on this on what to do or is this thing normal? do i need a flash? pls help.

tnx!

 

u dont need a flash to use a mbc. did u try to re-use any of the old tubing or did u use all new stuff? and where is ur vaccum source coming from?

 

get the heavy spring

 

reflash coming. i just re-used one small tubing and tap it to the bov and the intake manifold.

 

dude i have the hallman pro mbc. i didn't come with any other spring. it only came with the unit, hose, mounts and some zip ties. i bought it brand new from a vendor.

 

I just recently put my in without any problems. It's probably your vaccum.

 

You cannot re-use any of the lines, and you should not have tapped into the BOV line. It should have two completely new, fresh vaccuum hoses being used. One that goes from the side of the MBC to the wastegate and one from the bottom of the MBC to the turbo nipple.

Get to it - chop chop!

 

i installed mine with the heavy spring, the source off of the turbo nipple and using all new vacuum tubing. I can get boost up to where i want it for 3rd-5th but for some reason I also get only around 15 psi in 1st and 2nd. i thought up to 15psi in 1st was normal.

 

the Hallman is working fine. yes you do need a flash AND YOU ALSO NEED TO GET THE STIFFER SPRING!!!!!!!!!!!!!!!!!!!!!!!!!

 

the heavier spring is extra. does not come with kit.

 

got my kit from mach evo and it came with the heavier spring and didn't have to pay extra for it.

 

15 is a little low, but it should be lower than 3-5, because of the lesser load.

 

any other explaination what it could be?

 

my MBC came with the heavy spring and you should use the turbo outlet nipple as a boost source, make sure you capped off the stock solenoid nipples and the nipple on the intake pipe.

 

i just recieved my hallman pro mbc and i have no idea what spring is inside it. i guess ill find out when i install it. if it is the soft spring anyone know where i can order the stiff spring?