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Old 09-23-2015, 11:04 AM   #1
paprocjo
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Crystal Black Silica

Default Destroyed Short Block 21K Miles

2015 WRX with a ruined OEM short block

Fuel Type:
93, Top Tier from Costco

Mods:
ETS Intake
ETS Extreme Catback
Killer B J Pipe Catless
Killer B I Pipe
Cobb AP
Dyno Tune
IAG TGV Deletes
Boomba Dual Catch Can System
Boomba Short Throw Shifter
Boomba Transmission Shift Plate

Symptoms:
None

I had left it with Boomba racing for them to test fit some of their parts, before getting it back I asked them to run it on their dyno so I could get base line numbers at their shop since they have literally the coolest dyno setup ever, Mustang Dyno with a sealed room and perfect temperature control. On the first pull a huge cloud of dark smoke followed by a ton of white smoke erupted from the exhaust. The dipstick had shot out and sprayed oil all over the engine and the coolant had overflowed slightly.

Had the car towed to P&L Motorsports to have them take a look at since they have been building Subaru's for a number of years and my gut told me that it would need a engine.

They then removed and disassembled the engine and various other pieces to look for damage. There is no definitive proof but it looks like it was a bad tune combined with me beating the piss out of the car frequently. The pistons had melted and engine just blew up.

9/23/15
The Shortblock is completely toasted but luckily there was no damage done to the heads that can't be fixed with a quick cleaning. Right now it looks like I will be going with a P&L "Stage 4" built block, replacing the fuel pump with a DW 300c, and upgrading the clutch to a CM FX350. Finish it all off with a Jr Dyno tune for 93 and E85.

Dyno Run Video
https://youtu.be/S4L3bgA7BGQ

Now for some graphic images!!!

Spark Plugs!




Running a scope








Disassembled!






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Last edited by paprocjo; 09-23-2015 at 12:50 PM.
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Old 09-23-2015, 11:04 AM   #2
paprocjo
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2015 OILEATR
Crystal Black Silica

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Additional Pics!

Last edited by paprocjo; 09-23-2015 at 11:05 AM. Reason: Adding Pix dawg!
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Old 09-23-2015, 11:05 AM   #3
paprocjo
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2015 OILEATR
Crystal Black Silica

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Reserved
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Old 09-23-2015, 11:05 AM   #4
paprocjo
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Crystal Black Silica

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Reserved!
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Old 09-23-2015, 11:12 AM   #5
carlos.danger
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Whhooops!
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Old 09-23-2015, 11:12 AM   #6
dr_wookiee
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Yikes! How many miles on the car and what year/month was it manufactured? Thanks for putting together a thread to document this. Good luck on your rebuild.
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Old 09-23-2015, 11:19 AM   #7
_brian_
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looks like a pretty typical stage 2 setup, not even E85..
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Old 09-23-2015, 11:21 AM   #8
paprocjo
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Quote:
Originally Posted by dr_wookiee View Post
Yikes! How many miles on the car and what year/month was it manufactured? Thanks for putting together a thread to document this. Good luck on your rebuild.
Just clocked 21,000 so probably slightly over that. I am hoping to stop by the shop later this week to drop some stuff off, when I do I'll find out the year and month. Thanks!
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Old 09-23-2015, 11:28 AM   #9
shadrag
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Dyno tuned where?
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Old 09-23-2015, 11:32 AM   #10
Manley00
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I've got to ask, because there are now 3 threads on here regarding blown motors. This is the first I've seen on 93. I have a nervous habit about monitoring everything on my car after every fill up to make sure the gas I got isn't total ****. I live in CA though so it may be a bigger issue here. My question is, did you monitor constantly to make sure there was no knock. Our tunes are based on a certain tank of gas. Let's say it's tuned on the edge for that tank of gas. Then we get some crap gas, same station everything. Just a worse run of gas. This is the case every time I fill up here.
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Old 09-23-2015, 11:36 AM   #11
NoSoup4U
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Sorry to hear about your car. Will be looking forward to seeing what your built block can do though. Any plans on a turbo upgrade once the new block is in? Best of luck with the rebuild!
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Old 09-23-2015, 11:59 AM   #12
Boggie1688
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Mind sharing who tuned you? Also curious to see logs from the tuning session.
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Old 09-23-2015, 12:04 PM   #13
paprocjo
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Quote:
Originally Posted by Manley00 View Post
I've got to ask, because there are now 3 threads on here regarding blown motors. This is the first I've seen on 93. I have a nervous habit about monitoring everything on my car after every fill up to make sure the gas I got isn't total ****. I live in CA though so it may be a bigger issue here. My question is, did you monitor constantly to make sure there was no knock. Our tunes are based on a certain tank of gas. Let's say it's tuned on the edge for that tank of gas. Then we get some crap gas, same station everything. Just a worse run of gas. This is the case every time I fill up here.
I am a habitual, I went to the same gas station every time I had to fill up and if I couldn't then I made sure to only use a top tier station. It's had 93 in it every day of it's life. I never monitored the quality though I just assumed it was consistent which shame on me I guess. Car never knocked ever which leads us to assume that it may have been knocking but the tune was super desensitized and not reading any. It only knocked twice at 70 mph cruising in 6th gear and that was it.
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Old 09-23-2015, 12:05 PM   #14
cnaka
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the usual questions:
1) what oil and interval
2) what are your driving habits, do you let the oil come to temp before hitting boost? Do you floor it under 4k rpm?
3) If you have been monitoring knock, what were you normally seeing for FKL and FBK
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Old 09-23-2015, 12:06 PM   #15
paprocjo
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Quote:
Originally Posted by NoSoup4U View Post
Sorry to hear about your car. Will be looking forward to seeing what your built block can do though. Any plans on a turbo upgrade once the new block is in? Best of luck with the rebuild!
Thanks! It sucks but it's the risk that is assumed once the modding beings.

I do, my goal is 400/450 on 93 and 500 on e85 so a new turbo will be in order. I'm literally getting married in a little over a week though and my wife to be has given me the thumbs down on a new turbo kit in the forseeable future although I have other plans in mind
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Old 09-23-2015, 12:07 PM   #16
Manley00
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Yea, totally not blaming you. I just know every time I fill up with gas that crap is different. Same gas station or not. Then again I'm running 91 too so that might be a part of the issue. Good luck with everything, sounds alike you will come out better in the en led.
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Old 09-23-2015, 12:09 PM   #17
paprocjo
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Quote:
Originally Posted by Boggie1688 View Post
Mind sharing who tuned you? Also curious to see logs from the tuning session.
I don't want to release their name as I am afraid people will jump to conclusions as there are a few things going on. I am letting people know if they plan on going there what happened so they can be informed.

I have graphs I can post later when I can edit names out also a sad video of it dying.
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Old 09-23-2015, 12:16 PM   #18
Boggie1688
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Quote:
Originally Posted by paprocjo View Post
I don't want to release their name as I am afraid people will jump to conclusions as there are a few things going on. I am letting people know if they plan on going there what happened so they can be informed.

I have graphs I can post later when I can edit names out also a sad video of it dying.
Do u have logs though? From the AP during dyno pulls during the tune?
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Old 09-23-2015, 12:18 PM   #19
paprocjo
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Quote:
Originally Posted by cnaka View Post
the usual questions:
1) what oil and interval
2) what are your driving habits, do you let the oil come to temp before hitting boost? Do you floor it under 4k rpm?
3) If you have been monitoring knock, what were you normally seeing for FKL and FBK
1a) Subaru Oil / Fresh maybe 1000k since the last change
1b) Changed at 1K/8K/13K/18k roughly every 5k miles
2) Hard, always let the oil warm before boost, 1 RallyX, 2 AutoX, 1 Drag strip day. I have on a few occasion floored it under 4k but not on a regular basis.
3) Rarely and I am mean rarely would I have ever see FBK and never any FKL

Bonus Info!!!
Tune was set to run 18 PSI never went over.
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Old 09-23-2015, 12:19 PM   #20
paprocjo
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Quote:
Originally Posted by Boggie1688 View Post
Do u have logs though? From the AP during dyno pulls during the tune?
There are none sorry I miss read what you wrote.
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Old 09-23-2015, 12:21 PM   #21
2015WRX
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This is good for many of us to learn from. If a tune caused the issue it would be nice to see possibly why. I think it's a well known person from some other threads I've seen. Heck, may even be the one I'm using now.
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Old 09-23-2015, 12:22 PM   #22
2015WRX
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From the looks of it it went extremely lean for some reason.
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Old 09-23-2015, 12:26 PM   #23
Stretch18
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Quote:
Originally Posted by paprocjo View Post
Right now it looks like I will be going with a P&L "Stage 4" built block, replacing the fuel pump with a DW 300c, and upgrading the clutch to a CM FX350. Finish it all off with a Jr Dyno tune for 93 and E85.
Has any aftermarket vendor been working on a HPFP (High pressure fuel pump) replacement? The in-tank fuel pump is a good start, but the cam driven pump is probably a bigger factor once you start going too far beyond OEM output.

E85 is only going to exacerbate that, since you need a higher volume of ethanol, I'd be concerned about that cam driven pump being able to keep up enough pressure.

Note, I'm not saying this with any specific knowledge on the FA20, but all of the DI platforms have dealt with this problem (VW, Mazda, etc.) and I'd be surprised if there aren't higher volume options at least in planning...
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Old 09-23-2015, 12:27 PM   #24
Silentblack
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Sorry to see a nother one bit the dust. I guess I should make a thread about mine sooner or later.

I can't wait to see the build.
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Old 09-23-2015, 12:28 PM   #25
paprocjo
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Quote:
Originally Posted by 2015WRX View Post
From the looks of it it went extremely lean for some reason.
Quote:
Originally Posted by 2015WRX View Post
This is good for many of us to learn from. If a tune caused the issue it would be nice to see possibly why. I think it's a well known person from some other threads I've seen. Heck, may even be the one I'm using now.
Good news for you the dyno tune was not done in IL!
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