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Old 08-29-2019, 03:21 PM   #151
roamingromans
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Default Thanks all for the wealth of information

Just dropped off my '06 Baja Turbo with a blown engine along with a 95km EJ20X motor with my mechanic to install. I will be asking questions for certain, as prior to the original engine going kaboom I had been planning on making some changes and doing a minor amount of tuning to it.
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Old 09-02-2019, 05:19 PM   #152
09slowrex
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Finished this swap on my 05lgt. Used the long block, swapped everything over. Runs like a charm.
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Old 09-06-2019, 07:01 PM   #153
motorbykemike
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^ did you do anything with the cams or cam timing?
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Old 09-06-2019, 11:57 PM   #154
09slowrex
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Quote:
Originally Posted by motorbykemike View Post
^ did you do anything with the cams or cam timing?
No sir. Just as she came. Swapped manifold/vacuum lines/pcv/tgv with injectors from ej25. Swapped exhaust/turbo from ej25.

Basically used the short block. Oh yeah, swapped the drivers side air pump fitting block off from ej257 head.
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Old 09-09-2019, 03:40 PM   #155
motorbykemike
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has it been tuned yet ?
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Old 09-09-2019, 11:06 PM   #156
09slowrex
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Motorbykemike, no sir. Just running it off the stock 2.5 ecu. Pulled all the plugs, great color. No break up in the engine, it just runs great.

It was a low budget winter beater project for my wife to take to drill from New Hampshire to New Jersey. She's required to bring all her army stuff and her mini Cooper countryman was getting tight.

Do you absolutely recommend a tune?? I'm under 2k in this build, don't really want to invest another 1k into a app and tune.
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Old 09-10-2019, 07:53 AM   #157
motorbykemike
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I have experience with 4 of these now

yes they will "run fine" on the oem usdm ecu most of the time but they need to be tuned

timing / fueling and avcs tables for the 2.5 are all wrong for the 20x/y

if you don't want to spend the money on a cobb ap , just get it opensource tuned
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Old 09-10-2019, 11:32 AM   #158
mikeydrives1
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Tuner here.

These things require a retune to touch it up a little. The 2.5 US tune is not really ideal for these JDM motors at all. Between the smaller displacement and high compression ratio, the OEM tune is a problem waiting to happen.

It may "feel" like its running fine , but feel is only the tip of the iceberg compared to whats happening under the surface there. Based of the reputation that subaru motors will blow up by just changing the paint on your rear passenger door, never ever assume because it feels fine that it is running fine. Any changes or deviations from stock or what you are tuned for absolutely, positively requires a retune, or at the very least, datalogs to a knowledgeable pro who can look things over and make that determination.

-Mikey
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Old 09-12-2019, 08:30 PM   #159
09slowrex
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Quote:
Originally Posted by motorbykemike View Post
I have experience with 4 of these now

yes they will "run fine" on the oem usdm ecu most of the time but they need to be tuned

timing / fueling and avcs tables for the 2.5 are all wrong for the 20x/y

if you don't want to spend the money on a cobb ap , just get it opensource tuned
Anyone you recommend to do a remote tune??
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Old 09-15-2019, 10:17 AM   #160
Zadok
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Default EJ20X into a 2004 Baja Turbo

Hey Mikey!
I just installed my id1050xís with a custom parallel/equal length fuel system and want to run an E30 map. How sensitive is the parameters for Subaru with correcting the a/f if Iím not flex fueling it?
My bmw is smart enough to adjust if Iím a little bit off. I just make sure the gas/ethanol mix always fairs on the gas side. Now, thatís not saying I donít calculate the mix to be as accurate as possible. But itís never going to be perfect without a flex fuel system to adjust for it. With that being said, I always run the mix fat on the gas side so it doesnít melt my pistons. Too much E and things die. Too much gas and it just runs like ****. So, whatís your take on this for an ej20y swapped Baja on a fxt Ecu. This should be interesting. LOL!

Last edited by Zadok; 09-15-2019 at 10:24 AM.
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Old 09-21-2019, 07:23 AM   #161
mikeydrives1
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Quote:
Originally Posted by Zadok View Post
Hey Mikey!
I just installed my id1050x’s with a custom parallel/equal length fuel system and want to run an E30 map. How sensitive is the parameters for Subaru with correcting the a/f if I’m not flex fueling it?
My bmw is smart enough to adjust if I’m a little bit off. I just make sure the gas/ethanol mix always fairs on the gas side. Now, that’s not saying I don’t calculate the mix to be as accurate as possible. But it’s never going to be perfect without a flex fuel system to adjust for it. With that being said, I always run the mix fat on the gas side so it doesn’t melt my pistons. Too much E and things die. Too much gas and it just runs like ****. So, what’s your take on this for an ej20y swapped Baja on a fxt Ecu. This should be interesting. LOL!
Thats a whole can of worms that i would advise against experimenting with unless you are in there re-tuning for E30. The ECU has literally ZERO ability to detect OR correct fuel deviations within open loop (WOT boost), and relies entirely upon what the input from various tables such as injector flow, offsets, and airflow calculations (be that MAF or SD). If said tables are tuned to e0-10 pump gas, things will surely shift under use of E30, in terms of being leaner. In terms of how sensitive, im not sure what you mean exactly. If you are runnig E30, use the ID050 excel spreadsheet provided by injector dynamics upon that which you enter fuel pressure and ethanol content, and it recalculates a rough estimate of where all your background settings should be set to in terms of pulse widths and offsets.

You can run every calculation you want on paper, but execution in the real world is a different animal. As far as running on the "fatter" side of things, what AF ratio under heavy loads were you considering to be "fat" ?


-Mikey
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