I will be installing my Hallman MBC tonight or in the near future. I just installed my boost gauge last night. Now it seems like with my stock setup, if I get on it hard the boost will spike to like 22 PSI sometimes, then left back to like 17-18 until I shift. Is this normal? I've heard not to exceed 20 PSI stock. WHen I get the MBC installed, Do I turn it so the max PSI never exceeds 20 PSI? Or do I turn is so it levels out at 20 PSI? Thanks for any help or anything else I should know. I tried searching but there are way too many threads and couldn't get a straight answer.

 

Sounds like someone might have taken out the restrictor that is closet to the boost solenoid and that is why your getting higher then normal spikes and held boost. Ideally you will not have the spike anymore when you install the Hallman, but in the case you do you want to set the maintianed boost level to be 20psi or less.

 

Hey does it matter which side of the oil dipstick I tap into the boost hose? I did it to the short hose to the right of the dipstick, but if you look in the "how to" section, someone tapped into the hose to the left of the dipstick. Which is the correct method? Or does it matter?

 

The one that goes from the intake manifold to the solenoid on the fuel pressure regulator. I do not know which side of the dipstick that is on. I believe that it should be the one to the right if I have the picture in my head correct.

 

Double post (delete)

 

05s run 20.3psi from the factory, so a quick spike to 22 is not surprising. Plus, your boost gauge probably isn't extremely accurate anyway. If you get a TBE, then you will see even more boost than that even with the stock lines connected. When you install your Hallman, try to set it at 20-21psi on 93oct. A quick spike above that is fine, but you want it to hold 20-21psi during most of the powerband...

 

Oh my bad yeah I didn't notice you had an 05.

 

I bought the DEFI gauge package with autometer steering column gauge pod from Lancershop. The gauge jumps around a lot, but its nice too see when I am boosting if I want to conserve on gas. Thanks for your help and I think it make a little more sense to me know. I am sure I'll have more questions after in install the mbc....

 

OK I've been searching through these forums all day at work, its slow. I just tracked it any my MBC has been delivered to my home. I am so confused right now. I want to completely understand how to install this thing. Is a wastegate actuator and boost control solenoid the same thing? I keep reaing about both in DIY's. Also on Hallman's website the installation seems completely different than the threads on here. They don't talk about a T-fitting or the BOV to intake line, which is where I hear is the best place to tap into for installing the MBC. I am confused on what they call the wastegate actuator. Why do you have to cap off both inputs? Don't you still need it to control the wastegate? I am so lost, and I am mechanically inclinded so I can do the install myself, I just don't want to fry anything out. Please help..... warrtalon are you out there, hehe?

 

Wastegate actuator is on the actual turbo, only has one vacuum nipple on it. The wastegate solenoid is the electrical part that controls the wastegate actuator, it is located under the air box. You need to cap both the inlets on the solenoid (part under airbox) so it is not contaminated while not in use. You need to remove the entire factory hose that runs from the turbo oulet to the wastegate actuator to the solenoid. Cap the nipple on the turbo outlet, when looking down at it the one close to the engine. Put a T in the line running to your BOV, connect a line from that T to the bottom of the Hallman. Connect a hose from the wastegate actuator to the side of the Hall man.

You are done.

 

you can do it this way which will work perfect, and is the way mine is hooked up as we speek. Or, instead or tapping into the vaccume line inbetween the bov and intake mani, just use the nipple on the turbo outlet pipe going to the fmic. This will work as well. The only reason I dont have it hooked up this way is because the buschur fmic dosent have a nipple on the turbo outlet pipe...

 

either way, it is really easy. Just make sure you have some extra vaccume line, and T fittings, and vacume caps. Your local parts store will have these. I got mine from a local autozone...hope this helps...

 

thanks for the help. THis is the DIY i was using https://www.evolutionm.net/forums/sh...=116017&page=1
and whoever drew it has it labeled wrong I guess, thats why I was confused. It makes as little more sense. I guess it will be easier once I get my car apart and actually see the real parts and not just a pic, I'll post more once I have started installing it.... Thanks again guys....

 

hey one last question for now... Can I just connect both inlets on the wastegate solenoid back to each other with some extra hose, instead of capping it off? I think I read about that in the DIY too.... My kit only came with 2 caps, I don't want to go back out to the auto parts store for 2 caps!

 

I thought of a couple more questions before installing. Whats with the small hole on the side of the side nipple? Wouldn't that cost the valve to leak? Also the manual said you must have a performance exhaust, but it was a generic installation manual not specific to the EVO. Is the stock exhaust on the EVO considered peformance? I have K&N drop in filter already. Should I still be OK to install this valve? basically I want it for the faster spool up and being able to hold boost at 20 PSI instead of it falling off at higher RPM's. Thanks to anyone who responds.