Dual stage MBC info please?(dejon or turbo-xs)

[greenmachine97]

let me start by saying that i did search for this info, but i still lack the knowledge i need to make my decision. thanks in advance.

ok here is my scenario, i have 3" exhaust and a 3" downpipe on the way. and i know about boost creep. so i need to get a quality Manual Boost Controller. and seeing that my car has the dreaded FWD syndrom, i would like it to be a dual stage MBC. does this make sense? I have traction problems now and any help would be great. (i plan on getting an LSD in a few monthes and slicks over the summer).

Does a Dual Stage MBC allow me to make 2 different settings and change from one to the other "on-the-fly"? Like 11psi for 1st gear(daily) and 16psi for all the rest of the gears and/or the track use.
if so, how hard is it to switch boost levels in the middle of a 1320.

and after all else is answered, which DUal stage MBC should i get? i want the most reliable one possible. besides electronic, because i do not have money for that. thanks again

 

[hachituroku]

I highly recommend the dejon tool Dual Stage MBC. It is cheaper than the turbo xs model and it works excellent.

 

[greenmachine97]

can you tell me about how hard it is to install or how hard it is to switch boost levels? can you actually set 2 different boost levels and switch between them?
do you have the dejon "a" or "b"
thanks

 

[RossY]

i dont know the diff between a or b but i know that a dual stage boost controller is one that usually has two boost levels. Some controllers allow you to set both levels and others leave the first level at stock and allow you to choose the second level. It's as easy as the flip of a switch to change between boost levels.

 

[hachituroku]

I chose the 'a' model, but they both work the same way. just one is set for stock boost with the other on a preset. with the 'b' model there are two presets. The a model is cheaper, so that's why I got it. either way, it is easier to hook up than a mechanical boost gauge. Best MBC I have bought so far ( been through about 3 of them, cheap ebay ones seize up)

 

[greenmachine97]

but can you choose what psi the "high" boost level is? like if i wanted to run 11psi for the "low" level and 16psi for the "high" level, is that possible?

 

[hachituroku]

yes that's how it works. I have mine set for 18 psi and the other stock boost. When you get it, the instructions will clue you in on everything.

 

[greenmachine97]

cool, thanks alot for the info. and You would reccomend the Dejontool DS-MBC rather than the Turbo-XS DS-MBC? if so why. sorry for the many many questions, but i am very tight on cash but i want to have everything done RIGHT! and i want to make sure that i am getting the best i can for the money.
thanks again

 

[2GeNTSi]

I just ordered mine about 5 min ago, along with a Walbro 190 fuel pump...should be getting my gaskets and bolts in two days for my downpipe. I've been waiting for 3 weeks just to get these gaskets so I can finally install my downpipe, it's just sitting in my room.

Hopefully I'll be able to woop my friend even when he gets his boost controller, he doesn't have a fuel pump yet or any kind of fuel management so he'll probably be running lean once he turns up the boost.

 

[Shifty]

Originally posted by 2GeNTSi
I just ordered mine about 5 min ago, along with a Walbro 190 fuel pump...should be getting my gaskets and bolts in two days for my downpipe. I've been waiting for 3 weeks just to get these gaskets so I can finally install my downpipe, it's just sitting in my room.

Hopefully I'll be able to woop my friend even when he gets his boost controller, he doesn't have a fuel pump yet or any kind of fuel management so he'll probably be running lean once he turns up the boost.

that was pointless...

Do you have a site that tells you the diff? they are in the 2g parts catalog on this site. check into that, and either will work fine, but each have subtle differences.

check this one site, explains what each does, they start bout half way down.DSM parts or something...

Good luck

 

[painmaster]

Anybody have the Turbo-XS one? I have it, but I have problems. Haven't figured it out yet. First stage works fine but when switched to 2nd stage it has less boost, no mater which way the screw is turned.

 

[TTalon]

get the dejon tool one i ordered it, its the same as turbo xs but a lot cheaper!

 

[out there]

there was one in the catalog a while back; it was designed for fwd with three settings: 1st, 2nd, and 3-5.

 

[IMMORTALSPYDER]

I heard lots of bad stuff about the turbo xs so I'm gonna go with the Dejon Tool. There's also a company called MMI that makes one.

 

[2GeNTSi]

Man I have the MBC hooked up except for the solenoid, we tried hooking it up to the cig lighter but for some reason the solenoid is not getting any power, I'm going to try to fix that on Thurs.

Anyways I emailed Dave Johnson over at Dejontool, I told him about my boost level not getting any lower even though I have the thumbscrew ALMOST all the way out. He suggested hooking up the vacuum to the compressor housing nipple instead of the teeing it into the BOV/Manifold hose (which is where mine is). I'm going to do that on Thurs as well as fix the solenoid so I can use the hi-boost switch. I'll update maybe Thurs night or Fri.

Oh yeah where did you guys mount your switches? The previous owner had a switch mounted near the bottom left of the steering wheel. There's a cover that hides one of the bolts so that you can remove the panel under the steering column, there was a switch on that cover that I never knew what it was for. I figured out one day that it was to bypass the AC and fan so that he can cool the car whenever he wanted, I just disconnected the wires, took out the switch and replaced it with the one that came with the MBC.

 

[hachituroku]

I have mine mounted under the steering column right side. As far as the vacuum hookup is concerned, there is no reason why the tee from the BOV shouldn't work. Mine works there fine. Teeing it off from the comp. housing is not a good idea since you will get unstable levels of boost that will effect your MBC. Double check your ground connection, though, that's the most common mistake.

 

[hachituroku]

Also, how did you wire it? The easiest and safest way is to wrap the power wire around a 12v fuse in the fuse box. that way you know exactly what circuit you are in and don't have to splice and dice up the wiring.
The only thing that I found a little confusing about the install was that the switch I got didn't have the leads marked

 

[2GeNTSi]

Also, how did you wire it? The easiest and safest way is to wrap the power wire around a 12v fuse in the fuse box. that way you know exactly what circuit you are in and don't have to splice and dice up the wiring.

My dad was thinking of using the fuse box for power but we ended up using the cig lighter. I know the wire we tapped into the cig lighter power has continuity so I guess there just isn't any power going to the lighter. But I remember using the lighter one time because I used my friends G-Tech device and it worked fine.

As for using the compressor housing for the mbc vacuum, how would that cause unstable boost pressure?

 

[hachituroku]

It isn't neccessarily bad to use the comp. housing port, it's just better to use a constant vacuum source coming from the intake manifold, as opposed to changing vacuum rates at the turbo. Your readings are far more consistant, that's why everyone uses fp solenoid line to the manifold for the boost gauge tee.

 

[Jimmy Jr.]

Just like they say about standard boost controllers and their reliability no matter the brand the same applies to dual stage ones. The only difference between a standard mbc and dual stage is the solenoid. So with that said, get the MMI it's the cheapest and it will do the job just fine.

Without activating the solenoid the boost will be at stock which on my car was 12psi with the t25 and now with the b16g it's at 11psi. The other level can be set to whatever you like.

 

[NeOzz1]

I highly suggest dejon tool, I just put mine on monday and I think its works great and it was also alot cheaper. All you have to do is basically attach two tubes and run the switch its very simple.

 

[blwn2g]

I have the turboXS dual stg. and it works good.
I have it set at 1st stg. 12psi for normal driving.
2nd stg. set at 20psi for those Mustang's
TurboXS dual stage works for me. No problems hooking it up and set up.

 

[2GeNTSi]

Originally posted by hachituroku
It isn't neccessarily bad to use the comp. housing port, it's just better to use a constant vacuum source coming from the intake manifold, as opposed to changing vacuum rates at the turbo. Your readings are far more consistant, that's why everyone uses fp solenoid line to the manifold for the boost gauge tee.

so would my boost gauge be reading 0psi rather then -18 or something like that when I'm idling or if I let off of the throttle? I'm just curious because I won't mind doing this if it allow me to set a lower boost setting. But I'm assuming that there is a vacuum reading for a reason, even though I don't know exactly what you can diagnose from it being off or too high.

 

[GSntncT]

They both do the same thing. However the Turbo XS is over 200$(if I'm not mistaken), while the dejon is only 120$.

you do the math.

Also, I'd recommend getting B. That's only because if you go with a turbo large enough(20G and up mostly) the stock 14-15 PSI isn't even in the efficiency range, as they are usually at 18psi, sometimes 20. With B, if you want to run stock boost you can set it to do so-hell you can even have it set lower than that. i really can't consider a 2 stage controller that automatically has one preset that you can't change, a true two stage controller. That's just me though.

 

[Tallen]

I love my Dejon Tool DSMBC-2b. It switches with the flick of a switch....very cool, works great. I see no reason to pay more.