hey guys im about to get the forge mbc and a boost gauge...i was just looking to find out how to adjust the boost? and what psi to boost at with just tb exhuast. thanks guys!

 

It will be self explanatory once you get the MBC

 

I'm getting ready to do this myself. From what I've read on these forums:

1. Make sure the mbc is turned all the way counterclockwise so that you're at stock boost.
2. Find a long strip of road and maybe a friend in the passenger seat to keep a good eye on your boost gauge.
3. Drive the car at WOT in 3rd gear to see where your boost is hitting.
4. Pull over and turn the mbc 1/2-1 full turn clockwise to increase your boost and repeat step 3.
5. Keep doing this until you've reached your target boost level (~20-21psi).

Someone please correct me if I'm wrong or if I'm missing anything!

 

+1

 

thx man..just what i needed cause im going to be doing this next paycheck! think ill feel the differnece once i get the mbc on?

 

you'll definitely feel a difference - I installed the Forge MBC last weekend. the feeling at WOT when the boost hits 21 psi or so and just sticks there instead of tapering is awesome.

 

A MBC is one of the best mods you can do especially if you already have an exhaust. I think you gain at least like 20 whp from just a mbc. One thing to remember is that you will overboost in 4th and 5th gear no matter what with a mbc. My 5th gear boost is like at 22.5 psi set by al, but in 3rd it's right at 21.5psi. It's nothing to worry about he told me.

 

93 octane: 21 psi peak 3rd gear

91 octane: 20 psi " " "

Some have suggested more psi respectively ea. But this will give a margin for error