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Old 11-05-2008, 04:12 AM   #1
azn0boi04
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Default whats the best Manual boost controller for 94 ej20g

im looking to buy a manual boost controller.. because i dont feel like buying a PFC or electronic boost controller.... or something expensive like that.

i heard some cheap MBC have a spike in psi and then drops like 3 or 4 psi..
that true?

well if u have suggestions let me know..or if u have one of your own.

pros/cons of a MBC.

Do u still have to Tune? or is everyone running stock ECU

how much higher can i turn the boost before i need a tunable ECU. im running about 11.5 PSI right now...



thanks.
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Last edited by azn0boi04; 11-05-2008 at 08:16 PM.
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Old 11-05-2008, 04:35 AM   #2
mannyOlicious
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i never see many pros coming from the MBCs... they leak, are unstable, fail, etc etc...

i would keep the one you have... your car came with one so why add or replace boost controllers? just go to your tuner and have them set it for you.

you will hear this a lot, but a spending 200-400 on a nice tune is so much better than 4000+ on a new motor...
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Old 11-05-2008, 09:18 AM   #3
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i have a JoeP mbc that has been very reliable for many years, holds boost rock steady. It outlasted my expensive Blitz dual sbc controller. Its long been a favorite in the DSM crowd before the wrx hit the US. It relatively cheap compared to the newer Hallman mbc's which i hear perform well too.
You will need a tune to complement the mbc or ebc you choose.
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Old 11-05-2008, 09:32 AM   #4
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I liked the turbosmart boost tee. It clicks as you move it, so it is easier to dial in a given boost. I didn't see much spike, but that was on a stock turbo.
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Old 11-05-2008, 01:52 PM   #5
azn0boi04
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Quote:
Originally Posted by fastnoypi View Post
You will need a tune to complement the mbc or ebc you choose.

dang.... i have to tune it?
thats what im trying to get away from... i have stock ECU. and i dont wanna spend a grand or so on a tunable ECU.

i can still use a MBC without tune right? what will happen without a tune?
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Old 11-05-2008, 02:15 PM   #6
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HALLMAN FTW, never ha d a problem with it in 2 years.
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Old 11-05-2008, 02:30 PM   #7
mannyOlicious
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Quote:
Originally Posted by azn0boi04 View Post
dang.... i have to tune it?
thats what im trying to get away from... i have stock ECU. and i dont wanna spend a grand or so on a tunable ECU.

i can still use a MBC without tune right? what will happen without a tune?
well one of the problems is that if you up the boost, and not adjust the fuel to compensate for the larger amount of airfow, you will run lean and that could soon result to engine failure
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Old 11-05-2008, 02:43 PM   #8
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MBC=yuk on factory ECU.
That said I love the Hallman.
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Old 11-05-2008, 02:46 PM   #9
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halman pro ftw!
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Old 11-05-2008, 04:24 PM   #10
azn0boi04
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Quote:
Originally Posted by mannyOlicious View Post
well one of the problems is that if you up the boost, and not adjust the fuel to compensate for the larger amount of airfow, you will run lean and that could soon result to engine failure

i want to up the boost from 11.5psi to 15psi... is that too much?

and isnt it, if u turn it down u run a lil more fuel efficient.
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Old 11-05-2008, 08:07 PM   #11
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I use the hallman pro on one SS, and the pro rx on the swapped L.
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Old 11-05-2008, 08:15 PM   #12
azn0boi04
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how much higher can i turn the boost before i need a tunable ECU.
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Old 11-05-2008, 08:23 PM   #13
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what year and model ej20g do you have? what color are your injectors? what turbo are you running? depending on these factors, you may be able to tune with a piggyback timing controller, and RRFPR, as long as you have a good wideband 02 sensor.
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Old 11-05-2008, 08:27 PM   #14
azn0boi04
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Quote:
Originally Posted by Arctic Assassian View Post
what year and model ej20g do you have? what color are your injectors? what turbo are you running? depending on these factors, you may be able to tune with a piggyback timing controller, and RRFPR, as long as you have a good wideband 02 sensor.

i heard that there is no piggyback system for my car... its a 94 WRX. i think the injectors are Grey... no 100% sure. i have TD05 turbo... no wideband yet.

the only way to tune my car is going with a Pfc.. or link ... something like those. standalone
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Old 11-05-2008, 08:47 PM   #15
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i have the same exact 260 ps ej20g with the td05 16g and z4

i assume no piggybacks work
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Old 11-05-2008, 08:52 PM   #16
azn0boi04
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yeah... i dont have Z4 tho... i have U8... how is the Z4? ... worth buying one?
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Old 11-05-2008, 10:09 PM   #17
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I'm not a fan of throwing on a MBC w/o tuning, it's just too risky IMHO and for some of the reasons outlined above, but I completely understand your pain regarding the cost of tuning. I was considering the Z4 for my '96 EJ20G based on a number of things I've read, but decided to go with the Power FC. You may have seen this, but here is the link just in case... http://forums.nasioc.com/forums/show...ghlight=Z4+ECU.

All that said, I've used the Perrin, GFB and Turbosmart and by far the Turbosmart was the best of the bunch. Easy to adjust the boost (after you've dialed it in, simply count the clicks for the desired boost level). However, each MBC was used on a car that had been tuned. I used the Turbosmart for the Texas Mile run and it held 28psi for the last 1/4 mile without a bobble or spike.

Last edited by beaviscih; 11-05-2008 at 10:21 PM.
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Old 11-05-2008, 10:23 PM   #18
azn0boi04
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yeah i saw that.. thanks for the thread... but i think if i wait a lilbit i can find one cheaper. i remember seeing some before that were cheaper... but back then i wasnt interested in Z4 ecu... or maybe ill save up and get a PFC. that would be better in the long run...
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Old 11-05-2008, 10:27 PM   #19
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Quote:
Originally Posted by mannyOlicious View Post
i never see many pros coming from the MBCs... they leak, are unstable, fail, etc etc...

i would keep the one you have... your car came with one so why add or replace boost controllers? just go to your tuner and have them set it for you.

you will hear this a lot, but a spending 200-400 on a nice tune is so much better than 4000+ on a new motor...
mbc's are 100% more stable and fail resistant then any EBCS or EBC..
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Old 11-09-2008, 03:14 AM   #20
rob
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sent you a PM.
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Old 11-09-2008, 08:09 AM   #21
RA Limited
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a million PSI.
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Old 11-09-2008, 01:14 PM   #22
suberdave
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shoot me a PM i have a Dual stage TurboXS boost controler that i will sale you for $50. this is the one i ran on my car, now i have a Blitz EBC.

-=Suberdave=-
www.suberdave.com
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Old 11-25-2008, 10:38 PM   #23
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I'm in the midst of swapping a 20G into my 22T powered legacy. I'm very broke from it already!!! so the stock boost controller for the tiny turbo off the 22 will only run like 8psi or so right. Getting an intercooler so what doe's the early G's run stock like 12psi or somthing would it be okay to use a MBC to get it up to 10-15psi???? I'm getting a boost gauge and Oilpress gauge before I evin think of rasing boost!!!!! is the comp just set to certin perameters to let the waste gate move a certin amount??? so it will be running at a certin % of flow to the turbine?? maybe it will run at a higer boost than the 22's turbo baised on the fact that it's bigger?????????????
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