Messing around with an MBC because it didnt seem to regulate boost one of my friends just said whats this and turned it to positive 100% and i didn't know where it was so i left it, then saw how much it boosted (just went up fast) so i knew it was at 100% but i took the MBC off to see if it regulated my breath, just to make sure the valve was still working. It does. It shows which way the air is supposed to flow through it but i dont know which way the flow goes from the 2 lines coming from underneath the TID!!

Any idea?

Evan!

 

u sure the lines werent switched around? my buddy installed his MBC lines on backwards and the boost immediately shot up to as high as it could go, we switched the lines around stayed within safe perimeters.

 

I have switched the lines both ways!! And it still SHOOTS up to 10 psi in first gear and it is set all the way closed!

 

try opening it up about 1 turn. How high does it boost in all the other gears?

 

You need the vacuum line that gets your boost signal to hook up from the MBC to the nipple coming off your compressor housing. Then the other vacuum line has to connect from your MBC to the wastegate actuator nipple. To raise boost, tighten the ****...

If it's just a bleed-valve, then you just set a "T" between the vacuum line that runs between the compressor housing nipple and wastegate actuator nipple. To raise boost, loosen the ****/open the valve up.

 

make sure to block off the lines for the stock boost control solinoid, one line goes to the TID and another goes the compressor housing i belive