mbc HELP

[rayrayx11]

ive got a dual mbc from dejon. ive got a hose running to the waste gate actuator. and a hose from to the turbo compressor. what do i do about the 3rd hose from the stock solenoid. and where does the T fitting go?!?! does the T fitting connect the turbo compressor to the 3rd hose for the stock solenoid? please helpppp. i got a head ache from thinking bout this too much. ive been looking around forums all day

 

[92AWDHX40]

If you can find a thread, i would call or write dejon tool there on here as one of our vendors.

 

[the_mork]

Completely get rid of all the lines going to the BCS, throw them at the wall and forget them. Do the same with the T. Do not disconnect the electrical connector.

Now, run vacuum hose from the nipple on the compressor cover to the bottom of the MBC then run vacuum hose from the side of the MBC to the nipple on the wastegate. Zip tie the MBC to something without stretching or kinking the hoses, the passenger side fan is a common mounting point.

Turn the MBC all the way out so that the screw just stays in then take it for a drive. If you want more boost turn it half a turn in and repeat. The first bit you might not find much difference, but small adjustments turn big so don't just crank it down.



Edit:
I took a look at the Dejon website, and you will have a bit more work taking care of the electrical connections but you can safely ignore the idea of tapping into the bov vacuum hose. The compressor outlet provides a much better and more reliable signal.

 

[92AWDHX40]

or what he said.

 

[rayrayx11]

ok so whats the T fitting for? sounds like i just ignore the fitting go straight to the compressor cover.
i read in another post something about plugging up the hole in the intake. without looking at it im guessing that one of the hoses from the solenoid runs to the intake?

 

[the_mork]

You don't need to plug anything and I don't believe even for the Dejon mbc that you need more than two lines. One of the things that is confusing is the difference between 1g and 2g cars. You have a compressor outlet and 1g cars have a nipple on the charge piping (IIRC). According to the Dejon instructions they use the T to take signal from the bov line which works but IMO is inferior to using the nipple on the compressor cover, there are benefits to both options but for a healthy car the compressor nipple is the way to go.


Edit: I just realized what you mean by the intake, and yes you need to plug the hole in the black snorkel that goes between your air filter and turbo (assuming it is still stock) and yes the EBC has a line that runs to it on the bottom side on the front. Cap it off with a proper vacuum cap, they are about $1 for a variety pack and I have heard of silicone becoming a hazard to the turbo if it breaks down or if the car is used before it completely dries. You will no longer need that port at all for your MBC.

 

[rayrayx11]

thanks alot. itll be tomorrows project to finish the mbc. i have an injen intake but it has the port too. got to go to the parts store anyways to get a switch. they never sent one.