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Old 06-27-2012, 01:36 AM   #1
JDMFLCL
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Default Questions regarding oem ecu+MBC (EJ20G)

Aight. Prob. selling my car and might run a setup like this. Can I run the following parts?

1995 WRX EJ20G w/ TD05
Z4 ECU
walbro
02 coilpack conversion w/ bkr73 @ .028
3" catless turboback
MBC @ 1 bar PSI.
TMIC or FMIC.

#1.) Is it ok if the oem boost control solenoid isn't plugged in?
#2.) Will there be any stuttering issues? I.e. full boost until 4500, a lull, then continue to redline?

CN: Basically will the above run well?

Thanks!
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Old 06-27-2012, 03:42 AM   #2
pmugabi
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The OEM solenoid should be plugged in electrically to avoid a CEL. The air hoses don't need to be plugged in.

The setup will work. However the octane of your fuel will determine whether or not the engine detonates itself to death.
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Old 06-27-2012, 07:56 AM   #3
JDMFLCL
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91 octane. I ran it on a stock tune (no mods on motor) for a year with no problems.
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Old 06-27-2012, 09:06 AM   #4
suberdave
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i ran that same basic setup on my EJ20G for like 3-4 years. with a huge FMIC, put down 250 AWHP.

we have 92 oct fuel here.

i would suggest getting a knock light.

-=Suberdave=-

Last edited by suberdave; 06-27-2012 at 02:44 PM.
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Old 06-27-2012, 10:40 AM   #5
69subaru360
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Needs 93 octane and the factory bcs needs to be plugged in. It'll work fine.
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Old 06-27-2012, 12:26 PM   #6
rob
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Quote:
Originally Posted by suberdave View Post
i ran that same basic setup on my EJ20G for like 3-4 years. with a huge FMIC, put down 293 AWHP.

we have 92 oct fuel here.

i would suggest getting a knock light.

-=Suberdave=-
wait wait wait...same "basic" setup? Wasn't this your mod list for your 293 dyno pull?

1996 EJ20G Full standalone ViPEC ECU 780cc injectors FMIC Stock TDO5h 16g Blitz boost controler @ 17PSI 05 Ign coil mod APS BOV vented Full 3" TBE lots of tuneing...

That's taking quite the liberty with approximation Dave
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Old 06-27-2012, 12:27 PM   #7
rob
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Quote:
Originally Posted by pmugabi View Post
The OEM solenoid should be plugged in electrically to avoid a CEL. The air hoses don't need to be plugged in.
Yep, but you do need to cap off the return line at the intake pipe. You can't let that one dangle.

-Rob
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Old 06-27-2012, 01:24 PM   #8
JDMFLCL
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We only have 91 octane here
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Old 06-27-2012, 02:43 PM   #9
suberdave
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you are right. before the injectors and the standalone. it was not 293.

it was 250 hp 230 tq. with the Z4 ECU and a turboXS MBC.

to get it to 293 i did have to give it more fuel. and some more tuneing.

but i did run it with the stock ECU for a few years before the standalone.


-=Suberdave=-

P.S. i fixed my other post...


Quote:
Originally Posted by rob View Post
wait wait wait...same "basic" setup? Wasn't this your mod list for your 293 dyno pull?

1996 EJ20G Full standalone ViPEC ECU 780cc injectors FMIC Stock TDO5h 16g Blitz boost controler @ 17PSI 05 Ign coil mod APS BOV vented Full 3" TBE lots of tuneing...

That's taking quite the liberty with approximation Dave
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Old 06-27-2012, 10:14 PM   #10
JDMFLCL
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So I take it I can't run the above setup on 91 octane?
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Old 06-27-2012, 10:26 PM   #11
69subaru360
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Quote:
Originally Posted by JDMFLCL View Post
So I take it I can't run the above setup on 91 octane?

You can but it's kinda risky. It would be safer with one of the lower performance ECUs and less boost on 91.
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Old 06-27-2012, 11:28 PM   #12
eg33GC
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As a seller I'd be worried about liability.

Rob and I have a ton of stock roms, of which I'd recommend like a u8 or a v9 wrx, which could be burned for you.


I'd lower the boost to wastegate and wave goodbye
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Old 06-28-2012, 02:25 AM   #13
JDMFLCL
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pm me
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Old 06-29-2012, 05:31 AM   #14
JDMFLCL
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Well update. I did alot of reading around the forums, so I'd like to rephrase my question.

Can I run a FMIC w/ VTA bov+turboback on a Z4 ECU @ the stock 12.7psi? No MBC (stock boost solenoid). I.e. will it run smoothly?
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Old 06-29-2012, 05:32 AM   #15
JDMFLCL
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double post
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Old 06-29-2012, 08:16 PM   #16
69subaru360
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Quote:
Originally Posted by JDMFLCL View Post
Well update. I did alot of reading around the forums, so I'd like to rephrase my question.

Can I run a FMIC w/ VTA bov+turboback on a Z4 ECU @ the stock 12.7psi? No MBC (stock boost solenoid). I.e. will it run smoothly?
The boost might be erratic with the FMIC. It will have more boost loss through the core and the ecu might go wacky trying to compensate. Add a cheap mbc and it'd be fine.
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Old 06-30-2012, 01:09 AM   #17
JDMFLCL
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so MBC @ 12.7 psi w/oem solenoid plugged in and I'd be fine?
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Old 06-30-2012, 12:13 PM   #18
69subaru360
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Quote:
Originally Posted by JDMFLCL View Post
so MBC @ 12.7 psi w/oem solenoid plugged in and I'd be fine?
yes45
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