Buschur does not have them in stock right now I don't believe. When I talked with them yesterday it sounded like they could get them in a few days.

 

Mach V www.machevo.com has them in stock.. you can also go to the Hallman site or www.boostcontroller.com

 

How did you guys connect your MBC? I had the boost solenoid hose, the turbo manifold (intake), and one of the hoses to the MBC (I am sure the other one is going to the wastegate actuator) all T'd together. The other hose from the MBC is connected to the wastegate actuator. Is this correct? My car is acting up bad and I had a detonation also in 3rd gear!!!

 

Sounds like your getting a wild amount of overboost to get detonation.. I'm going to ask the obvious, and then point out a few important things about the MBC (EBC too) install, first.. do you have a boost gauge installed? If you don't you shouldn't have even attempted a boost controller.. ANYWAY, from your describing about your install, it sounds incorrect.. an MBC does not need to be connected to the stock boost solenoid. There are only 2 connections, the gold colored actuator on the turbo housing which is your wastegate actuator, and another connection close to it on the turbo housing (the gunmetal gray colored part of the turbo).. the original boost controller has two hoses coming off of that, and T-d to the original boost control solenoid.. The stock solenoid uses a bleedoff to control boost levels. MOST boost controllers act as a restriction in the line therefore raising boost.. What does that mean? You disconnect the stock boost controller hoses, plug them and tie them up out of the way.. you then take the MBC, connect 1 hose to the Wastegate actuator, and the other hose to the scroll housing fitting (the other line off the turbo).. those hoses go to the MBC, be aware that there may be a particular way the boost controller hoses need to be connected since some use a ball/spring as a valve. However all in all, there are only 2 connections made, and the STOCK components are put up out of the way, and left intact so you can reconnect it in the future if you like. If you don't want to keep those hoses, you can remove them from the solenoid, but leave the original solenoid and its wiring connected.

 

Will or does your set-up trigger the "service engine soon" light? Mine just did before I read your reply. DO I have to plug BOTH hoses going to and coming from the stock boost solenoid or I can get away with just plugging the one that was T'd to the wastegate actuator and the manifold? I will rehook everything up today, or maybe right now!!!

Thanks a lot for your help!!!

 

All you need to leave in place is the electrical connection to the solenoid. All other hoses can be removed or tied back out of the way.

 

I just disconnected the MBC and put a nylon fitting on it to run my car in BASICALLY stock set-up to determine stock boost. Now my car maxes out at 14-15psi and tapers at around 13-14. Could the longer lines done this? Could the previous detonation or having the "service engine light soon" have done this? Is my car running lower than stock (18-19psi)? I have disconnected the battery several times but my car does feel a little slower. COuld it be my gauge? I double checked everything and all is TIGHT and SNUG.

HELP!!!

 

MalibuJack

Did what you told me. My MBC is almost closed and the boost still peaks at 24-25 psi! What could be the problem? I just resealed everything right now, and I will be testing it again in about an hour. Let me know if I am missing anything.

THANKS!

 

The hallman should be open (counterclockwise) on the knob for very low boost. The adjustment knob should sit opposite the barb which leads to your pressure source, while the other barb should be routed into your wastegate actuator.

 

I actually have a turbonetics dial-a-boost MBC. Any thoughts?

Still confused... but Thanks!!!

 

Ooops sorry I didn't see that. Same principle applies in fact I am looking at the dial-a-boost instructions now online.

http://www.racetep.com/turbo.html#dab

 

Ive seen that before and I do have those instructions. Well, what I think now is the MBC is for really high psi. I think just a very very slight small turn will get my car to max boost at 20psi. SHould I go for 23-24, maybe 21-22 psi?

Thanks aGain!!!

STI

 

Yes by all means turn the knob very gradually, then test, rinse, repeat, etc.

I would not run over 20 psi on pump, in fact at the track last night my 20 psi was pulling timing big time in 4th so I lowered it to 17-18 psi. The weather happened to be warm and humid so that didn't help.

 

Khen
MalibuJack

Thanks a lot for your help!!! You are both now in my circle of trust. I finally grew the huevos to drive the hell out of my car today just opening it as much as I could. It still went to 25 psi so I would let go of the gas and think what I needed to do. I even had the MBC all the way to minimum boost but my boost gauge still read AT LEAST 25 psi. After numerous diagrams and thinking, I was like, forget it, and I just opened the MBC up to about 1/3, and lo and behold, the boost went down and capped at around 21 psi!!! I do not know if the knob is the other way around, or I am just cursed because this happened to me with my 911 Carrera. ANyway, I got it now to boost maximum at 20-21 psi (more on 20), and it tapers to around 18-19 (stays at 20 sometimes)!!! Thanks a lot!!! This is a great experience for me since this is my first turbocharged car!!!! Thanks again for the help!!!

Anybody who needs step by step instructions in installing and MBC, HOLLA!!!!!

STI (I am out to get ya now!!!)

 

I had a warm humid day today, my car pulled the timing with 93 octane and 20psi of boost.. I backed it off to 19.5 and it was ok.. The only disadvantage of a manual boost controller is the periodic adjustment.. of course, on a hot humid day, you could just avoid getting on it.. LOL Don't run much over 20psi unless your really comfortable with the tuning and your running 94 or better gas.. Its just a bit risky, if your car pulls the timing (feels like it "lost power" a little) it means you've experienced detonation, and thats bad, if it happens frequently it could damage the engine.. actually it doesnt have to happen all that frequently to do damage.. but just be real careful.