i instsalled my hallman MBC today with the information found on the forums, i removed the two hoses from the n75 and connected them to the mbc, leaving the electrical connection to the n75. now no matter how much i adjust it i will not boost over 5 psi. i am warming up and am going out in a second to make sure i didn't install it backwards, but any suggestions in the mean time would be helpful.
thank you

 

I remember reading a few months ago about someone that had the exact problem as you. I think they either connected it backwards or did not have the n75 hooked up right. I do aquick search to find the thread im talking about.

 

ok i checked, it hooked up correctly and all the lines are on tight, but i think i figured it out i think i just need to change the spring out and run it again

 

wooo hooo, i love this thing, i spool so much faster and i am spiking at 17psi and holding 15psi to reddline, now if i can just get an Emanagment program that works with vista.

 

nice good to hear you figured it out

 

so im installing my mbc this weekend, what exactly did you do to fix it?

 

I recently installed my MBC also. I kept going into soft limp because i hadn't installed my a diode onto my map sensor yet.

 

he just had to put a different spring in i think.
hernandez how are you running your n75?

 

#1- I want to see pictures!!!

#2- I have a speedtuing chip, and with just my redular old N75 I am spiking at 19 and holding at 15/16....

#3- what were you spiking/holding before the mbc?

#4- I also have the VDO boost guage, so our #'s shouldn't be very far off....

interesting, good to hear that you figured it out!

 

My MBC came with 2 springs, soft and firm, originally i thought the directions said the soft spring would allow for 5 extra psi, and i found out that it meant that it will only allow for 5psi so i switched for the firm spring. i plan on taking it up a little further because of the chip, i cants get lemmingwinks, unisource or any vag software to work on my Vista laptop. i would like to fine tune the fuel and timming. but it realy is a simple install the majority of the wort was getting the rusted hose clamps off