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Old 05-18-2020, 02:08 AM   #1
Ih8Hondas
Scooby Newbie
 
Member#: 514838
Join Date: May 2020
Location: New Mexico
Vehicle:
2006 Baja Turbo
Atlantic Pearl Blue

Default Bought first Subaru. Seems I've jumped straight into the deep end.

Bought a 2006 five speed turbo Baja a few days ago. Joined here because scoobytruck is pretty dead. Plan on flex fueling it, but after doing more research it seems like it may be a doozie to get done. ECU swap (along with turbo, intercooler, and neutral switch) seems to be a requirement as no one appears to have gotten flex fuel working for it with ROMRaider. Then there's the question of will an STi flex fuel kit communicate with the STi ECU through the Baja harness...

This could be... interesting. I've either bitten off more than I can chew, or I'm going to be learning a lot.
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Old 05-18-2020, 12:06 PM   #2
Jedi03
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Member#: 491095
Join Date: Sep 2018
Chapter/Region: SWIC
Location: New Mexico
Vehicle:
2009 STi Blue
Blue

Default

i would imagine it would be similar to the wrx non-sti models...i know cobb makes a pretty straight forward setup...not sure how plug an play it is though as we are all doing alot of custom work to these lol!
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Old 05-18-2020, 12:26 PM   #3
Ih8Hondas
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Member#: 514838
Join Date: May 2020
Location: New Mexico
Vehicle:
2006 Baja Turbo
Atlantic Pearl Blue

Default

I read through Cobb's flex fuel tuning guide (https://cobbtuning.atlassian.net/wik...l+Tuning+Guide) and they just use the TGV and rear 02 inputs to interpolate between two maps (one for E0 and the other for E100, but apparently they don't really change anything above E70 due to diminishing returns as ethanol content increases past that point). I would think one would be able to repurpose those inputs to do the same thing in ROMRaider, but as far as having the two separate maps goes, I have no idea. I haven't looked that thoroughly into ROMRaider's capabilities yet.
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Old 05-18-2020, 01:02 PM   #4
trueno92
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Member#: 111755
Join Date: Apr 2006
Default

romraider has flexfuel in carberry, but i don't know if carberry roms can be run on 32bit platforms...

may have to go stand alone but OMG a kick ass baja would be epic.

romraider has a lot of good info. im still on it, daily. and running speed density on my car and helping others.
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Old 05-18-2020, 07:17 PM   #5
Ih8Hondas
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Member#: 514838
Join Date: May 2020
Location: New Mexico
Vehicle:
2006 Baja Turbo
Atlantic Pearl Blue

Default

Quote:
Originally Posted by trueno92 View Post
romraider has flexfuel in carberry, but i don't know if carberry roms can be run on 32bit platforms...
Guess that's something I'll have to look into. At least I know someone has done it through ROMRaider, even if it isn't on a 32 bit ECU yet.

Quote:
Originally Posted by trueno92 View Post
may have to go stand alone but OMG a kick ass baja would be epic.
I really hope standalone isn't the only option. Pretty sure I would do the STi transplant and get an Accessport before going the standalone route. It won't be kicking much ass either way though. I'm not looking for huge power. The thing got a new engine 10k miles ago according to the receipts that came with the thing, so I would like to make it last and not destroy the ring lands. 300-325hp and cheap fill ups are all I want.

Quote:
Originally Posted by trueno92 View Post
romraider has a lot of good info. im still on it, daily. and running speed density on my car and helping others.
Yeah. I'm going to dive into the forums over there today and look for possibilities.

Last edited by Ih8Hondas; 05-18-2020 at 07:43 PM.
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Old 05-19-2020, 01:24 AM   #6
bobjr94
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Member#: 6176
Join Date: Apr 2001
Chapter/Region: NWIC
Location: Roy,WA
Vehicle:
15 WRX, 04 wrb STi
85 wrb BRAT

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I have a 05 baja turbo, if you are looking for 300-325hp you don't need to swap ecu's or even do that much work. A downpipe, sti intercooler, catless up-pipe and used vf48 or 16G will get you 300+ hp. You can spend $150 for an ecu plus 650 for a accessport or just use romraider. I tuned mine on romraider and had no problems.

The baja has the same motor as the 04-07 sti, just detuned with a td04 running 11lbs of boost. Once you get to 330-350 you should go with larger injectors, 740s or 850 are fine and maybe a fuel pump.
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Old 05-19-2020, 12:12 PM   #7
Ih8Hondas
Scooby Newbie
 
Member#: 514838
Join Date: May 2020
Location: New Mexico
Vehicle:
2006 Baja Turbo
Atlantic Pearl Blue

Default

The main thing I want to do is flex fuel and basically go as far as I can with the stock turbo while maintaining reliability. I may add an STi intercooler. If that doesn't get me to 300hp, I'm ok with that. It will probably require larger injectors and a pump, but it will also allow me to advance timing and increase boost with less worry about knock than with E10.

I just found out last night ROMRaider can do what I want it to do, so I plan to go that route but I have a lot of reading in my future to even begin to understand it. I'm used to tuning carbs and mechanical diesel injection pumps, but this is a whole new level of complexity.
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Old 05-20-2020, 02:03 AM   #8
bobjr94
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Member#: 6176
Join Date: Apr 2001
Chapter/Region: NWIC
Location: Roy,WA
Vehicle:
15 WRX, 04 wrb STi
85 wrb BRAT

Default

I used romraider to dial in intakes, larger injectors, boost and wastegate adjustments for larger turbos, remove codes like for tvg deletes and high flow cats and for logging. Another thing I like about it is you can use it on multiple cars, not locked to one specific car like an accessport.
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Old 05-20-2020, 02:28 AM   #9
Ih8Hondas
Scooby Newbie
 
Member#: 514838
Join Date: May 2020
Location: New Mexico
Vehicle:
2006 Baja Turbo
Atlantic Pearl Blue

Default

Yeah. I love the open source aspect. My problem is figuring out how to use the software. After a lot of reading and a bit of youtubing I'm much more confident that I understand how different parameters affect things and that I can get the tunes done.

The next thing I want to do is get some OEM maps and just explore the software with them, but I'm having a tough time getting things organized and in the right folders and whatnot. I'm not going to go buy a Tactrix cable and laptop if I can't figure where all the files need to go. That's my biggest beef with open source stuff. It doesn't all come in one package or update with one click, and that's where I often run into problems. In the end I don't think tuning skills will be the limiting factor for me. I can learn that stuff. It's going to be my computer skills that are more likely to force me to go another route at this point.

I also have to figure out how the hell to do the Merpmod and how that changes things since I want to go the speed density route.

I feel like this would be a lot easier (at least for me) with more extensive video documentation on youtube. I learn much better by watching than reading when it comes to this stuff.

Last edited by Ih8Hondas; 05-20-2020 at 02:37 AM.
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