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Discussion Starter #161
Re: 2012 STi, "Natasha"

Silicone Intakes sells fuel pump brackets that you can buy to attach your fuel pump to the bulkhead. I ended up buying one of those, and having fabbed up this bracket, the fuel filter is solid. and wont go anywhere now.
 

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Discussion Starter #162
Re: 2012 STi, "Natasha"

Been a couple months, but so far everything has been great. I been DD'ing the car 64 miles a day getting ~15 mpg on E70. Lots and lots of backroad pulls. I love the EFR so much.

Seems like I may need to pull my gas filler neck and take a look cause I can only fill my car up 3/4 a way and it overflowed the other day onto my quarter panel.

Also, this happened


I paid it off 2 years 3 months early. I'm no longer modding Capital One's car! haha
 

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Discussion Starter #164
Re: 2012 STi, "Natasha"

Ooooh, extra mod money!


Congrats! It must be a good feeling!:tup:
yes. its a great feeling.

Since my payment was $400 and once my wifes Rogue goes back to Nissan(its a lease) in June I'll have an extra $950 a month just in 2 car payments and insurance costs.
 

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Discussion Starter #165
Re: 2012 STi, "Natasha"

So for awhile now my AP wideband signal has been off by about .5
This is from AEM's website



Turns out, when I do this, my wideband will read 14.7 but the AP reads 15.2
Consequently, I am running richer than I should.

I did not notice this as I never monitored the wideband from my AP, but used it to send logs with it to my tuner. when he was seeing commanded 11.7 AFR for E85, I was seeing 11.2. Ugh.

After doing some googling, turns out sometimes you need to scale it correctly. some people were seeing it off by about .2 and others by a full point. At any rate, I hope this saves someone else the headache.

Pardon the crappy pic. its a video I took from my cell phone.

 

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Discussion Starter #167
Re: 2012 STi, "Natasha"

I have decided that 2019 will be "no more leaks" year. I am tired of having misc leaks here and there.

I noticed a week or so ago that my turbo oil feed banjo had a bunch of oil crud around it, almost like it was sweating. This is what I was using, there was a crush washer on the bottom it just fell when I was taking it off



The orifice seemed really small for a turbo feed and I looked to make sure it didn't have a restrictor built in. I ordered a 4AN to M12 x 1.25 fitting from Summit racing.



There is only a little oil around it and I cleaned it up nicely. It leaked a bit on startup, so I tightened it down about 1/4 turn and so far no leaks.

I bought some UV Dye to put in your engine that will help you find leaks and when I took off my oil fill, I noticed a bunch of water/oil accumulation in the cap



The UV Dye is pretty cool. I put it in the oil, then drove around a bit. My buddy let me use his lift so I got underneath and noticed my oil drain is sweating too. Sigh

I also found a leak at what looks like my oil pan gasket by the flywheel, but it was very small. I am going to take a look again this weekend after driving it around this week.
 

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Discussion Starter #168
Re: 2012 STi, "Natasha"

Car still running great. Oil feed is solid, and I'm super happy with it. Oil drain is still "sweating" but I'm waiting for warmer weather before I do anything.

I did notice my cold oil pressure has been a bit lower lately. Usually its 90 psi cold start, 70 psi above 2500 RPMs and 20 psi warm idle

lately its been ~83 psi cold start, ~65 psi above 2500 and 20 psi warm idle. Could be just fluctuations in the sensor.

The sensor is in the rear galley plug.

I also got this



Wifes new DD. 11 WRX Premium with 67k miles. Paid 15k for it. Car was dealer maintained for years and owned by a lady. Only has Cobb SF intake and OTS Stage 1.
 

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Discussion Starter #169
Re: 2012 STi, "Natasha"

1 month update.

Not much has changed. Car still running great, and just bout to hit 25k on my garage built engine.

Wifes car go some upgrades. got a deal on Nameless muffler deletes. Her stock midpipe was pretty rusted though, definitely was not a garage car



Also picked up a Dual core Koyorad for my car and my buddies 07 GD WRX.



wait till its nicer to put it in. Will be doing the Dom cylinder 4 mod also
 

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Discussion Starter #170
Re: 2012 STi, "Natasha"

Picked up a blown shortblock for $150 from some kid who was moving to Cali



Yes, that is in my trunk of my STi lol


Turns out its got CP forged pistons and forged H-beams. Just dont know what kind yet


I am planning on sending this to Emerald Motorsports or Outfront to get closed deck treatment.
 

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Discussion Starter #171
Re: 2012 STi, "Natasha"

Tore the block down. pistons are definitely CP's

the rods are actually Eagle H-beams. but one didn't make it. RIP




The crank is trashed too. feels like sandpaper where this rod was attached, which was number 2 rod

also, number 3 rod was so tight I couldn't spin it by hand.

Looking at the bearings, they say "cosworth" on the back and they were all pretty beat up.
 

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Discussion Starter #172
Re: 2012 STi, "Natasha"

Been a bit since I updated this.

Car is still running fine. My Oil pressure gauge decided to wack out on me due to wiring, so I figured I'd redo it all since I still had my Defi boost gauge wiring installed...but no boost gauge.

So i tore it all out,and rewired it. I needed a wideband to tune my daily so I decided to buy an upgrade for the subaru



AEM X-line wideband. thing is tiny! but it works great, and is faster than the old AEM UEGO
 

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Discussion Starter #173
Re: 2012 STi, "Natasha"

Been having some cooling issues in the summer too, once I went FMIC. My temps would sit around 210-215 sometimes and when going WOT it would increase up to ~225.

I added a koyorad radiator which helped a bit, but I think airflow is my issue. I dont have my under-guard on and my hoodscoop is open. I plan on either finding an Impreza hood or blocking it with KStech hood scoop, but KStechs response has taken a hit.

 

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Discussion Starter #174
Re: 2012 STi, "Natasha"

Finally,

I've been having issues with my AF correction being really high. +14% sometimes at idle. I've done numerous boost leaks and found nothing but the car still ran great. Last time I did a leak test in Sept. of last year, I thought I could hear a leak near the turbo but due to the way my intercooler piping goes under my intake manifold I thought it was the air flowing through that.

Yamaha and I are going racing next Friday, so I did a log to be sure everything was peachy. I was not hitting target boost and the car was richer than commanded AFR.

Decided to do another leak test, and this time I took my bumper off and sprayed the entire engine with bubble/water. I doused the entire engine looking for ANY leaks.

well I found a few!

Turns out, the intake manifold -> TGV was leaking pretty good at 20 psi. Subaru says to tighten those bolts to like 8 ft lbs, but apparently that was not enough. I tightened them all again to ~20 ft lbs and the leak was gone.

However I could still hear a leak near the intercooler piping, so I sprayed all around the TGVs and soaked my fuel injectors. I found out both my cylinder 2 and 4 fuel injectors were leaking really badly. FINALLY found the source of my leak.

Jason gave me a few troubleshooting tips, but I could not get the leak to stop.

Unbeknownst to me, IAG says to use 1 8mm spacer between the fuel rail and TGV housings or it can cause a leak. I put the spacers on, retested and still had a leak.

So i said fuck it, and pulled the fuel injector to see if the O-ring was bad. and sure enough...it was



I ordered a bunch from RSD since they are in Utah and its fast shipping, so hopefully by this weekend my car will be leak free and Jason won't shoot me
 

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Re: 2012 STi, "Natasha"

Glad you're getting this sorted and that you're a customer that is diligent on finding and fixing your problem, while understanding that tunes don't just change drastically like that. :)

I look forward to the drag and roll racing. I am curious to see what the cars do, especially since I have not had yours on a dyno yet. In all accounts, you should beat me... You run a bigger turbo with more boost and it hands on better up top. I do wonder how my first 4 gears will do though... Between 4th and 5th is a huge gap for me.

As for the TGV's, whenever I take them apart, I always put some RTV on both sides of the gasket. I don't think I've had one not leak otherwise. Too bad you have to use spacers on a billet, custom part designed for how you're using it. :p I also forgot, at the time, that your injectors had those adapters on the bottom. That is why I couldn't understand how you couldn't get it to reseal... The Denso cushions are pretty fool proof.

Hopefully the weather gets nice soon... I'd like to test my new map with more boost before going to the strip. :)
 

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Re: 2012 STi, "Natasha"

Finally,

I've been having issues with my AF correction being really high. +14% sometimes at idle. I've done numerous boost leaks and found nothing but the car still ran great. Last time I did a leak test in Sept. of last year, I thought I could hear a leak near the turbo but due to the way my intercooler piping goes under my intake manifold I thought it was the air flowing through that.
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I ordered a bunch from RSD since they are in Utah and its fast shipping, so hopefully by this weekend my car will be leak free and Jason won't shoot me
Glad you're getting this sorted and that you're a customer that is diligent on finding and fixing your problem, while understanding that tunes don't just change drastically like that. :)
Was your AF learning also reflecting a leak? or was that normal?

I think the last time I had chatted with you guys on here, yamaha had said he tends to ignore AF correction due to its volatility. My LTFT (AF learning equivalent since I don't have a Cobb AP) hasn't crested +/-5% since fixing my last boost leak at the turbo -> IC elbow hose, but I've seen a lot of movement in STFT/AF Correction regardless where my AF Learning is.
 

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Discussion Starter #177
Re: 2012 STi, "Natasha"

Was your AF learning also reflecting a leak? or was that normal?

I think the last time I had chatted with you guys on here, yamaha had said he tends to ignore AF correction due to its volatility. My LTFT (AF learning equivalent since I don't have a Cobb AP) hasn't crested +/-5% since fixing my last boost leak at the turbo -> IC elbow hose, but I've seen a lot of movement in STFT/AF Correction regardless where my AF Learning is.
Good point. I seem to mix them up

I actually meant my AF Learning 1 is +14%, not correction.
 

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Re: 2012 STi, "Natasha"

Good point. I seem to mix them up

I actually meant my AF Learning 1 is +14%, not correction.
No worries! I had seen mention of AF correction issues starting to pop up on nasioc too and wasn't sure if I was missing something with diagnosis.

Any status updates on that blown shortblock you picked up? Were the cylinders still ok despite the condition of the crank and rod bearings? Was unsure how that'd play into eligibility for closed-deck treatment.
 

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Discussion Starter #179
Re: 2012 STi, "Natasha"

No worries! I had seen mention of AF correction issues starting to pop up on nasioc too and wasn't sure if I was missing something with diagnosis.

Any status updates on that blown shortblock you picked up? Were the cylinders still ok despite the condition of the crank and rod bearings? Was unsure how that'd play into eligibility for closed-deck treatment.
I tore it all down, and everything looks really good from my eye. Cross hatching still on cylinders and the pistons don't even have a ton of wear from the slap. the side skirts are still in pretty good shape

the PTW clearance was pretty bad IIRC. I wrote them down at home but I remember 1 of them being ~.040. which is loose even for CPs. The dude I bought it from had no idea what the backstory was, but just by looking at the parts I suspect it was detonating really badly hammering the bearings because there is almost no "bluing" of the rods. but who knows.

One of the rods(that didn't spin) was so tight on the crank it was difficult to spin by hand.

I cleaned 1 case half really well and need to get it to the machine shop to verify. Just had other life stuff come up so its taken a back seat for now.
 

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Discussion Starter #180
Re: 2012 STi, "Natasha"

some new updates.

My defi oil pressure died finally. I rewired it just to make sure, but its fubar'd. I suspect it to be the oil pressure sensor but since they want $150 for a new sensor. I decided to just buy a new one. Decided to buy a Tanabe VLS oil pressure gauge. I like they way they look and Tanabe is a decent brand.

 
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