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Old 05-28-2019, 12:19 AM   #101
Zadok
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Atlantic Blue Pearl

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Itís alive!
Reset the timing again. Exhaust cam retard setup. Rebuilt the downpipe again. And wrapped up the rest. Took her for a drive and it didnít run half bad. Definitely running a little leaner than the EJ255. Left the stock boost to 10psi until I get it tuned. Have to fix the exhaust again for the 4th time. Itís hitting the carrier bearing. Power steering is whining. Thatís new and annoying. Everything else seems good. I didnít install the oil filter relocation kit & cooler, the wideband O2, or the EGT probe yet. I have 2 weeks until we talking it upstate camping. Need to install the basket, custom fab kayak racks, & lights also. I think I have my work cut out.
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Old 05-29-2019, 08:29 PM   #102
warpwar
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Quote:
Originally Posted by Zadok View Post
Itís alive!
Reset the timing again. Exhaust cam retard setup. Rebuilt the downpipe again. And wrapped up the rest. Took her for a drive and it didnít run half bad. Definitely running a little leaner than the EJ255. Left the stock boost to 10psi until I get it tuned. Have to fix the exhaust again for the 4th time. Itís hitting the carrier bearing. Power steering is whining. Thatís new and annoying. Everything else seems good. I didnít install the oil filter relocation kit & cooler, the wideband O2, or the EGT probe yet. I have 2 weeks until we talking it upstate camping. Need to install the basket, custom fab kayak racks, & lights also. I think I have my work cut out.
Which fuel injectors did you use? the Baja's Yellow or the EJ20x's Blue ones?
I'm running into some knock issues with mine, I'm running down a few ideas.

Thank you.
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Old 06-02-2019, 06:08 PM   #103
motorbykemike
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i'll add to this just for the point of more info for future swappers

car is an 05 obxt auto ,old motor had a burnt ex valve and was bone stock other than a recent bnr16g turbo and fp inline filter for the turbo oiling

I purchased a pre-facelift/non secondary air pump manual trans ej20x (?I assume it's an x not y) engine with the td04hla ts turbo that had a dp stubby that appears to be an hks part , there was no intercooler but everything else was there

I used everything that came on the ej20x/y other than the following

I swapped both intake and exhaust cams to 04-06 sti usdm parts and used the us non avcs ex gears and ex cam seals, the sti cams are about 1mm more lift than the ej20x/y cams , amazingly the buckets did not to be changed , resealed the valve covers using 08up usdm sti gaskets

swapped in a new for my cars vin engine wiring harness and got rid of some ex avcs plugs I didn't need at this point and gained some tgv plugs that I just might use later on

swapped in some oem yellow sidefeeds in place of the smaller ej20x/y set, mainly to work from a us lgt/obxt cobb stg tune to start (turns out that's no bueno, tune time)

ported a set of 04-07 sti/lgt exhaust mainfolds and used a coated grimmspeed cross pipe and wrapped invidia up pipe , the upper ex mani heat shield tin on the right side needed to be trimmed to clear the ex avcs parts

used the bnr 16g evo3 turbo that came on the car

cobb 3 port ebcs I had laying around

used the tmic w/ bracket , brake booster hose & map sensor w/ filter from the obxt , update: swapped to a perrin tmic and gfb response bpv from my wifes old lgt

used a very old perrin 2 piece twin cat down pipe and modded a spt lgt cat back to fit the obxt and some 2015 sti mufflers with modded hangers

car is running the oem us 2005.5 obxt ecu and custom tuned through a cobb apv3

the only codes I got were the 4 tgv plugs and the pcv valve connector is not plugged in so that one as well

Last edited by motorbykemike; 07-09-2019 at 09:09 PM.
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Old 06-04-2019, 10:25 PM   #104
Zadok
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Atlantic Blue Pearl

Default EJ20X into a 2004 Baja Turbo

Quote:
Originally Posted by warpwar View Post
Which fuel injectors did you use? the Baja's Yellow or the EJ20x's Blue ones?

I'm running into some knock issues with mine, I'm running down a few ideas.



Thank you.


I used the yellow Baja injectors for now. I will be getting 850-1050cc injectors so I can run an E30-40 mix.
Iím also running an aftermarket fuel pressure regulator set to 43.5psi unplugged.
For now Ray at Turbotektuning is working with it to get it tuned. Base tune doesnít run bad. Iím glad Iím finally getting to use my grimmspeed ebcs. Base tune is only 12psi 91octane. Main tune will only be 15psi 93 octane. Iím going conservative for now. I didnít swap the trans and it doesnít sound that great.

Last edited by Zadok; 06-12-2019 at 02:42 PM.
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Old 06-12-2019, 02:41 PM   #105
Zadok
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So Iím getting the car tuned and it doesnít have any torque. I spoke to the tuner and he said that he has done many EJ20X/Y engine and retarding the exhaust cams causes the engine timing to get messed up. And thatís exactly how it feels. Hopefully Iíll be able to retime it to stock and Iíll get some torque back. It literally would not go up an 10í 30 degree climb in 1st gear nor would it hold 60mph in 4th gear to the floor on a 15 degree climb up a mountain. Pathetic.
Iíll keep everyone informed on how the timing change affects the drivability of the car.
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Old 06-12-2019, 02:47 PM   #106
Mreed6360
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Keep us posted, my attempt to get the exhaust cams as close to zero may not have been the best. It made sense at the time based on what I had read, but I'm not an experienced tuner.

So far I think mine runs well, but maybe I'm missing all the low end torque and just don't know it? I never drove my Baja with the 2.5 motor, so I'm not sure what I'm missing.

I'm very interested in what a real tuner/shop with experience has to say.
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Old 06-12-2019, 02:49 PM   #107
Zadok
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Atlantic Blue Pearl

Default EJ20X into a 2004 Baja Turbo

Itís easy to figure out. If itís ok through the power band and then it ****ing rips at 5k, itís loosing torque.
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Old 06-12-2019, 02:57 PM   #108
Mreed6360
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I wouldn't say that's what I'm getting. I feel like I've got good pull from 3k ish on up. And no big spike at 5k.

But, I don't have a Dyno, so no hard data to work with.
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Old 06-12-2019, 07:09 PM   #109
Mreed6360
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Quote:
Originally Posted by Mreed6360 View Post
I wouldn't say that's what I'm getting. I feel like I've got good pull from 3k ish on up. And no big spike at 5k.

But, I don't have a Dyno, so no hard data to work with.
I'm betting mine is different because I copied the JDM intake avcs map over. And it has gone of advance compared to the Baja map.
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Old 06-13-2019, 06:37 AM   #110
Zadok
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Atlantic Blue Pearl

Default EJ20X into a 2004 Baja Turbo

Very possibly.
I swapped the timing belt back to stock last night. And it is definitely better. And for all those who donít know, if you take the ac & alternator off and move it to the side, you can put a C clamp over the entire tensioner and block and compress the tensioner without removing it or any of the other pulleys.
WTH that being said, I was able to go up my neighbors driveway in 1st and almost 2nd and itís like a 45-50 percent grade. Itís steep as ****. Definite could not do that before. And the power band feels more even now. With that being said, Iím still running off the map Ray made me with the old timing corrections. Hopefully it gets even better than that with his map.
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Old 06-13-2019, 06:41 AM   #111
Mreed6360
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Cool! Glad to hear it's improving. I feel like I should go back over my cam timing theory in more detail. Mine runs ok I think, but maybe my original thinking was not the best.
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Old 06-13-2019, 06:46 AM   #112
Zadok
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Atlantic Blue Pearl

Default EJ20X into a 2004 Baja Turbo

Itís ok man. Thinking out of the box is awesome. Ray tells me that retarding a full tooth actually retards it almost 2 due to the rotation equalization. I must say thatís a little over my head, I think he means that with a timing light, the belt rotation would show both cams being retarded as a whole equaling 2 teeth/14 degrees? and thatís too far. Cam gears would be the only way to retard it accurately.
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Old 06-13-2019, 06:52 AM   #113
Zadok
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Are you getting any knock with the timing so far advanced?
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Old 06-13-2019, 08:57 AM   #114
Mreed6360
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I had a little knock under mid load mid rpm, but I pulled the ignition timing back a few degrees and that cleared it up.

It comes on power at a about 2800 ish RPMs and pulls steady to 6.5k. I have the auto so it's a little annoying with it's shift points and general lack of feel.

My goal with the cam timing was to make it as close to stock for what theJDM motor was as I could, since messing with it without a Dyno and real experience is tricky. There is a whole lot of stuff where you get into changing volumetric efficiency and that is over my head currently.
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Old 06-13-2019, 08:59 AM   #115
Mreed6360
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Sorry, just reread your question. I should have clarified, I have lots of intake cam advance, not ignition advance.
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Old 06-18-2019, 08:17 AM   #116
UncleLimpy
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Quick update: I haven't been driving it because I got stationed in CA and it was bike weather year round, but I've installed a VF48 and will be installing an STi TMIC shortly. I've already reached out to a tuner and will be going through the e tuning process. Looking forward to driving it without babying it
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Old 06-18-2019, 08:34 AM   #117
Zadok
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It is confirmed!
Running the factory timing setup and disconnecting exhaust cam timing and sensors works fine.
Anyone doing this swap, in the future, should save yourself the hassle of changing the timing on the exhaust cams.
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Old 06-18-2019, 09:15 AM   #118
UncleLimpy
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Quote:
Originally Posted by Zadok View Post
It is confirmed!
Running the factory timing setup and disconnecting exhaust cam timing and sensors works fine.
Anyone doing this swap, in the future, should save yourself the hassle of changing the timing on the exhaust cams.
Good to know and thanks for the contribution. I gotta say, I wish this thread was around when I started the swap. Also I've been telling people this whole time I had the only EJ20X 5 speed baja in the world but I guess I've been lying
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Old 06-18-2019, 10:45 AM   #119
Mreed6360
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Quote:
Originally Posted by Zadok View Post
It is confirmed!
Running the factory timing setup and disconnecting exhaust cam timing and sensors works fine.
Anyone doing this swap, in the future, should save yourself the hassle of changing the timing on the exhaust cams.
Good deal! I'm going to re-time mine the next chance I get. I'm excited to see how it operates with that timing, I didn't think it was too bad the way I have it setup, so I'll be in for a treat when it really runs good!

Sorry my timing theory was off and you had to waste time messing with it.


Just a curiosity, as far as tuning, did you leave the intake AVCS tables alone in the Baja ECU?
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Old 06-18-2019, 10:47 AM   #120
Zadok
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Sweet, I hope it works out as good for you as it did for me.
Iím not sure bc I am not actually doing the tuning. I can ask.
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Old 07-07-2019, 01:46 PM   #121
05lgt6969
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Quote:
Originally Posted by Unrealgtx View Post
just a quick note for you guys . I have a 2004 swapped BH Outback ( swapped in my old Baja turbo harness and all after I wrecked it ).Point is I have the EJ20x and I used the EJ255 Lower Exhaust cams , cam seals and cam gears and everything ran great on the first start up , no check engine lights . so for those curious its all plug and play if you got the necessary parts from your old engine . and I didn't deal with the CPS situation

hope this helps anyone whos curious about doing the lower cams to have spot on timing


How is your intake cam sensor dealing with extra notches the 255 has 2 and ej20x has 4 im trying to see if i should just buy intake cams as well?
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Old 07-08-2019, 10:59 PM   #122
George22002
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Quote:
Originally Posted by Zadok View Post
It is confirmed!
Running the factory timing setup and disconnecting exhaust cam timing and sensors works fine.
Anyone doing this swap, in the future, should save yourself the hassle of changing the timing on the exhaust cams.
I did this swap and after much research I timed the exhaust avcs 2 teeth ccw, which makes it as close as possible to the 07 sti non avcs , and puts the timing at 55 degrees , if you just leave the exhaust avcs unplugged your timing will be about 20 degrees. My engine runs great from low end until 7000 rpm and is tuned for this timing, when my tuner started he agreed that 2 teeth ccw would put the timing as close to a non avcs engine as possible. Maybe this subject is subjective, one of us could be wrong but there are a few guys on here that went through a comprehensive test using stock and adjustable pulleys and they came up with the hard facts about 2 teeth ccw by actually measuring and degreeing the cams.
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Old 07-08-2019, 11:55 PM   #123
Zadok
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Atlantic Blue Pearl

Default EJ20X into a 2004 Baja Turbo

So you used adjustable cam gears to adjust the timing?
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Old 07-09-2019, 07:53 AM   #124
George22002
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Quote:
Originally Posted by Zadok View Post
So you used adjustable cam gears to adjust the timing?
No, I just went 2 teeth CCW, if I had adjustable cams I would go 2 teeth ccw and rotate adjustable cam cw 2 degrees to make it 53 like the 07 sti.

Last edited by George22002; 07-09-2019 at 08:13 AM.
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Old 07-09-2019, 02:28 PM   #125
SnotNose
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I have a 2009 Forester xt that currently has the ej20x swapped in it. Bought it used unknowing of this swap and have went through and fixed some issues that were not rocket science. Broken wastegate actuator. Spark plugs. Coil on cylinder 4. Boost control solenoid replaced. Deleted secondary air system with blockoffs and took it to a tuner where he turned off codes from secondary air delete, backed off timing one degree and pulled my boost to 14psi since I was getting some intermittent knock and boost spikes around 17psi at full throttle. Everything checked out but now, 3 months later, my reading with btssm from Bluetooth adapter is reading vacuum at -3psi one second and going to -12psi the next. Has noticeable power difference when it reads -12psi at idle. Any idea? Could it be from the swap? Uses no oil and idles a little high when cold. I'm new to this car but I have some mechanical
knowledge and no tuning experience. Thanks in advance.
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