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Old 04-14-2019, 09:48 PM   #76
05lgt6969
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Member#: 498836
Join Date: Mar 2019
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Quote:
Originally Posted by Mreed6360 View Post
So, I've amateur tuned a few things before, but not a Subaru. With my budget constraints i ended up buying a Tactrix OpenPort 2. and tuning with Romraider/ecu flash.

this entailed a ton of research, which I enjoyed.
I ended up finding Roms from were my engine should be from (JDM Legacy) and edited the Baja Ecm to replicate the Rom from the JDM Legacy in some areas but not all.

Then I did a ton of data logging, and editing of the "working" rom that i was using. I ocused on "fixing" one part of the tune before moving on to the next.

I had a few areas where i needed to adjust timing, and the MAF scaling needed adjusted for closed and open loop. and I fee l like there s still more to it. But i feel like I have learned a lot along the way.

if you have the budget I highly recommend using a good tuner/dyno time to get your setup dialed in. I was only able to do it on my own because I added a wideband o2 and did a decent amount of data logging and interpretation, and read a bunch of books about engiens and turbo engine operation. It's not for everybody. And while i believe my tune is safe and makes decent power, i think a professional tuner could give more power/ better fueling.

TLDR, I have a day Job, and making fast Subaru's isn't exactly it.
Im hopeful that my ecu is safe to drive this around for a while till i get the money to get it tuned since our motors ar the same but stock hp is different i wont beat on it but i am worried and what injectors did you go with the yellow or the blue?
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Old 04-14-2019, 10:35 PM   #77
Mreed6360
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Member#: 488145
Join Date: Jul 2018
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2005 Baja
Silver?

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You should be ok, I would just stay out of high load/ high boost as much as possible until you get tuned.

I can't remember how lean mine was with the stock Baja ecu and with this motor, I started messing with it pretty much as soon as I had it running.

I went with the blue ones that came with the ej20x.

Mostly because I wasn't shooting for more power than stock, and so the larger yellow injectors from the ej255 we're not needed.

Also with my budget/time frame just leaving the JDM injectors in place made sense. I didn't want to have to buy seals, or take any more apart than was absolutely necessary.

If you already have it apart, by all means go with the bigger yellow injectors, it will make your fueling richer which is good.

I kept everything from my ej255, so that if I feel like it later I can add the bigger injectors. But with mine being an automatic I'm not sure if I'll bother with that. I really really like manuals. But didn't have the budget to swap that too.
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