RidicilousRx7

where do you install the manual boost controller on a 87 turbo II? i tried installing it but the boost isnt moving.

skir2222

turbo line to mbc, mbc line to wastegate

iceblue

It wont move up anyways. You do not have a 3" or larger DP

If you have a Greddy Profec B Spec II Boost Controller
1. Why are you installing a MBC?
2. Why are you asking how to install a MBC?

iceblue

I have a 2.5in DP with 2.5in exhaust with zero emishions whatsoever and run solid 6psi not any higher no creep without a ported wastegate on a S4. MBC hook up or disconected still runs 6psi.

classicauto

iTrader: (3)

ice is right, the usefulness of a mbc is only truly demonstrated on huge capability turbos. That way if you have a 35psi cabale snail under the hood you can dial it back to 15 and drive to McDonalds then crank it up at the track.

its won't make your stock turbo act like a garrett gt40

slip_N_slide83

ok i did this to my 89 probe GT "turbo" home made with a open close valve some vac. lines and a T fitting.... this on off the http://www.performanceprobe.com website
Hose #1 connects the boost solenoid to the turbocharger assembly.
Hose #2 connects the boost solenoid to the wastegate actuator.
Hose #3 connects the boost solenoid to the intake duct between the mass air flow sensor and the turbocharger. i just had my valve all the way open and my probe hit 12 PSI and fucked up 5.0 mustangs i want a GT MX6 turbo

RidicilousRx7

im waiting on the profec b going on 7 weeks now and i wanna go to the drag races tonite so i wanna turn up the boost. the dp is 3' . i installed it the same way Skir2222 said but it didnt move.

RidicilousRx7

ya we did all that, and it isnt movng, must be a boost pill.......

gerbraldy

If your going to "cool" street races then don't put any bc on it. Your 3" will flow as much boost out as your turbo can push.

Aaron Cake

iTrader: (1)

Thread cleaned. Keep it that way, or it's gone.

iceblue

damn n00bs you need to state that **** then. If not we have nothing to go by but your sigy.

Aaron Cake

iTrader: (1)

iceblue you are a n00b, moreso then anyone else in this thread. Tone it down.

Digi7ech

iTrader: (1)

A boost controller no matter what sized turbo will always increase boost. It will also decrease the time needed to achieve that boost.

On a stock turbo a boost controller usually isn't needed due to boost creep(usually brings it up a few psi)

I don't know how your not doing more than 6psi Ice. A free flow exahsut will allow the turbo to spool quicker and add psi. The additiional psi on our cars is from the wastegates inability to releive the turbo of the excess exhaust. S4's are known for their boost creep.
S5's are a little better due to the dual port but still creep.

Anyway back on topic.

You may have the boost controller on backwards or something.
Check the instructions or find the companies website to see which direction it's suppose to go.
Also not to make you sound dumb but is the dial/**** turned all the way to one side(maybe stock pressure)?

iceblue

Not exsactly. A MBC will only allow you to raise boost. The amount of full open boost is controlled by the waste gate. A MBC only causes a block in the line causing less flow to the waste gate befor its opening point allowing boost to rise. Providing there is enugh flow to spin the turbine.

The only way to be able to sustain a boost above the factory waste gate or any wastegates level is to use a closed loop controller that uses a bleed line to help prevent it from spiking or creeping higher then desierd. Again the waste gate must have attention taken to it or this whol thing is useless.

iceblue

If you cant take constructive critisisum then dont do so yourself. Like I said on what you deleted ^ join date has jack to do with n00b ness or knowledge

Aaron Cake

iTrader: (1)

It may not, but since you've been here you've been treading on thin ice. Spreading misinformation, making combative posts, etc. If you want more, we should continue this in PMs. Otherwise, consider this issue closed in this thread.

staticguitar313

iTrader: (2)

^^^^
more info in these MBC's please, real info . . .

RidicilousRx7

figured out the problem, it was a defective regulator... might as well wait on the greddy