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So let me give yall some background here. I have a build thread for my corvette. Corvette is still at the shop. I traded my mach-e in for a subaru wrx that was owned by one of my customers previously (They had an old stage-x tune for their focus st). Well they eventually traded their focus st for a 2020 wrx.

The wrx is fully bolted with flex fuel and was on e60 fuel tuned by phatbotti. I purchased the car Saturday and after 4 pulls the motor let go. My intuition here is that the person who traded the car didn't have any idea and probably didn't do pulls on it. I like to drive my cars and do pulls.

The car was making 380whp and a spun rod bearing is common on these cars for that power level, there was no knock feedback until the rod spun meaning the tune was not the cause I just mentioned the tuner because they are actually a reputable wrx tuner from what I've read.

Unfortunately this was my daily so now I'm driving my 2 motorcycles :p

I will be ordering a stage 2 IAG shortblock and having my old turbo vendor that built our focus st hybrid turbos rebuild the turbo into a hybrid turbo.

I will be re-tuning the car myself with ecutek to keep flex fuel functionality.

and so it begins......

Picture captured while waiting on a flat bed as I pulled over after hearing loud clacking at 3-4k rpm to minimize damage.

Wheel Tire Car Sky Land vehicle
 

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I worked with a guy who had a 16 WRX, ported and polished turbo, intercooler, intake, DP, EGR delete, and exhaust.

  • Brought it to the dyno, made 310 about, it spun a bearing on the ride home

he rebuilt it with an iag shortblock like you are, spent months in the shop, same ported and polished turbo

  • threw a rod very shortly after being dyno tuned again

Last I heard he was building the motor again, I don't know what he ended up at with the car. He was stunned that I was making near on 350WHP and even more torque on a fully stock motor with a turbo and bolt ons. They're really cool cars but I just never hear anything good about the longevity of those motors, if I ever were to find myself in one of these I'd personally leave it stock, feels too much like a time bomb.
 

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Man that sucks, sorry about your luck with that.

I really wonder if the boxer engine by nature experiences more extreme loads than inline engines. There's never been a shortage of rod bearing failures across multiple lines of boxer engines.
 
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Discussion Starter · #5 ·
I worked with a guy who had a 16 WRX, ported and polished turbo, intercooler, intake, DP, EGR delete, and exhaust.

  • Brought it to the dyno, made 310 about, it spun a bearing on the ride home

he rebuilt it with an iag shortblock like you are, spent months in the shop, same ported and polished turbo

  • threw a rod very shortly after being dyno tuned again

Last I heard he was building the motor again, I don't know what he ended up at with the car. He was flabbergasted that I was making near on 350WHP and even more torque on a fully stock motor with a turbo and bolt ons. They're really cool cars but I just never hear anything good about the longevity of those motors, if I ever were to find myself in one of these I'd personally leave it stock, feels too much like a time bomb.
from what I've read the iag stage 2 block is bullet proof up to 475 whp and also comes with a warranty. If it also spun a rod it sounds like there was oil contamination and the guy didn't replace the oil pump, sprockets, turbo. Anything oil touches needs to be replaced.
 

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from what I've read the iag stage 2 block is bullet proof up to 475 whp and also comes with a warranty. If it also spun a rod it sounds like there was oil contamination and the guy didn't replace the oil pump, sprockets, turbo. Anything oil touches needs to be replaced.
I think he was doing something wrong, how do you bend a rod on a built motor right off the bat
 

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Man that sucks, sorry about your luck with that.

I really wonder if the boxer engine by nature experiences more extreme loads than inline engines. There's never been a shortage of rod bearing failures across multiple lines of boxer engines.
Porsche has had a far better track record in this regard. Subaru has a reputation for rod bearing failure. For example:


However, you would think that a properly built engine would have any known reliability issues taken into account and dealt with. A major part of any decent engine build is modification to improve or maintain reliability.

My condolences on the failure of a newly purchased car. That really sucks.
 

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@kgh I should have specified Subaru, but we could take a look at Porsche vs Subaru here. What percentage of Porsche owners mod their cars, versus Subaru owners? How many drive spiritedly as Subaru owners? Not that this plays any role on the lawsuit, which is referencing stock vehicles that also have failures.
 
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I hated one thing the most on my last couple of subaru's, and that was changing sparkplugs. I heard there is a new trick billet valve cover though that makes things easier...
 

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@kgh I should have specified Subaru, but we could take a look at Porsche vs Subaru here. What percentage of Porsche owners mod their cars, versus Subaru owners? How many drive spiritedly as Subaru owners? Not that this plays any role on the lawsuit, which is referencing stock vehicles that also have failures.
There is an industry for Porsches and modifications, etc. A large one. It isn't nearly as extensive as the Subaru market, but it's bigger than you might think. This has existed for decades, and even Porsche used to be in on it (to a lesser extent today). For example, for the 1974 Carrera RS you could add options such as brakes (off the 917, if memory serves), and other RSR components, to make for something approaching a street legal race car--at least if you lived in Europe.

Ruf, Singer, Gunther Werks, Gemballa, Raauh-Welt Begriff, and a number of other companies offer custom builds, specializing in vintage models. There's a reason the classic air-cooled 911s are getting to be so expensive. Want a 1974 Carrera RS but can't afford a million USD or so? No problem, you can have a beautiful replica built for a fraction of the cost.

Extensive engine builds are a popular inclusion, with built 3.6 and 3.8 liter flat sixes being common.

An that's only for the 911s. Most people who put that much into these cars tend to drive them pretty hard. I don't think many use them as daily drivers, however.

There are also outfits that will build you a replica 935 race car, one that can be tuned for up to 700 plus bhp from a flat six.

Porschephiles are well acquainted with these.

For modern models, the mods are fewer and farther between.

There was a recall several years ago for connecting rod fasteners on GT-3 models that used 3.8 liter engines, but only two failed before the recall. Engines were replaced after Porsche had studied the problem and found a solution, and that seemed to take care of the issue. This engine produced around 475 bhp at 8250 rpm.

Another recall, affecting 120 cars, happened in 2021. This was a result of a potential rod surface defect that could lead to cracks from normal stresses.

None of these issues was a result of inherently poor design (bear in mind that Porsche ran various versions of flat 8 engines and two versions of a flat 12 for sprint and endurance racing, and both proved to be pretty reliable.
 

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I'm no expert, but when I was looking for a project vehicle I wanted a 4 cylinder awd manual transmission vehicle. Out of the candidates the wrx did not make my list. I had a neighbor years ago whose wrx saw more downtime than my xrunner and I dropped the transmission in that truck a couple of times over a weekend. I was still driving more than his wrx. I would have scooped up a Focus RS but I couldn't find one that I thought was worth what they were asking (38k+).

BUT, I hope your wrx project has great success!
 

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Sounds like you went in knowing the risks, but still sorry for your bad experience with the worst timing. 😢

I quit keeping up with Subaru, for me kinda a combination of them dropping the hatchback, most MTs, and FA oil consumption and piston issues acquaintances had.
It pisses me off they maintain high ratings in the car magazines etc, but overall haven't stepped up over the years covering their issues any better for the average customer.

I still might be a sucker for a clean 2000s Subie hatch/wagon with an EJ and an MT, but anything remotely affordable is becoming more of a unicorn every day. 😕
Probably a better chance of me building a late-run XJ trail vehicle or something fun one day. 🤔
 

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Discussion Starter · #16 ·

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It is doing great! I’ll need a retune soon. It will be a wicked Powermax.
Hows the powermax tune going? ready for a re-tune on the dyno with more mods :p
 

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Discussion Starter · #19 ·

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you're a subaru :)
Subaru love is Stockholm Syndrome, and that's coming from a recovering victim. I've owned at least 12 over the years and I loved them all right up to the moment the engine popped or the subframe turned to dust.
 
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