Boost Controller Like a Shower Handle

[CowPimp]

Here are all the performance mods on my car:
intake, U/L IC piping, ported evo exhaust mani, 2.5" turboback (02 elim), FP big28, 1G BOV, 190lph fuel pump (3000GT I think), Hallman MBC.

I couldn't get my MBC to boost me past 11PSI after I got all the latest stuff installed (Downpipe, mani, turbo, pump). I didn't unscrew my MBC as far as it would go, but I gave it several full turns and it wouldn't increase the boost. I think there was another turn or two in there. Anyway, me and a friend adjusted the waste gate rod to get more boost. Now, I can't seem to get anything in the range of 13-20. I either get 11-13, or it shoots past 20. I turn the screw like 10 degrees or less and it shoots the boost up like crazy. Is the wastegod rod tightened too much?

 

[Defiant]

You turn the MBC screw IN to INcrease boost.

Provided you have it hooked up properly in the first place.

 

[CowPimp]

In is sort of ambiguous. I loosen the screw to increase boost, and tighten it to decrease boost...

 

[CowPimp]

Wow, I am an idiot. The first little bit that I loosened the screw raised the boost about 2PSI, so I assumed I should keep loosening. Tightening did nothing. So, I tightened the controller all the way, then loosened it about a turn and a half. Bam, problem solved. I'm now running at a solid 17PSI with the A/F gauge reading all the way to the max. I'm not going to try and run higher considering all I have is a 3000GT fuel pump and a FRAM fuel filter. I might even turn it down to 16 for daily use. I'm a tweaker at heart though (Not just with cars, with everything), so I talk like I care about safety, but act like a tweaker. Thanks for responding to my newbiness. =)

 

[MoChee]

wow, i always see you reply first with great answers, good work and keep em coming!

Originally posted by Defiant
You turn the MBC screw IN to INcrease boost.

Provided you have it hooked up properly in the first place.