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Old 02-09-2020, 08:36 AM   #26
MyNameIdeasWereTaken
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Agreed... These cars are meant to be driven and driven hard.

It doesn't sound like you did anything wrong, though it could be due to the tune or associated parts. But either way, the chance of this happening is just as likely when hitting boost on the road.

You wouldn't let a flat tire discourage you from driving on the road. Or a burnt out bulb discourage you from using your lights. Mechanical parts will always fail, but luckily, parts are replaceable. Go make some fun memories!
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Old 02-09-2020, 09:41 AM   #27
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Without some sort of metallurgy test done, it is hard to say. Autocrossing obviously imposes more stress on components, including the turbo. On/Off throttle is going to produce more twisting force to the compressor blades from the acceleration/deceleration. Maybe you already had a small nick in one of the blades from a small foreign object and autocrossing was too much for it. Maybe that compressor wheel had a flaw from the manufacturer that reared its ugly head now. Again, no way to tell without testing, which at this point is more trouble/money than it is worth.
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Old 02-09-2020, 11:57 AM   #28
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The boomba causes compressor surge... that fluttering is no bueno for the turbo. Doesnt matter what excuses or BS you find where people justify it and what not.
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Old 02-11-2020, 12:11 PM   #29
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Quote:
Originally Posted by MyNameIdeasWereTaken View Post
Agreed... These cars are meant to be driven and driven hard.

It doesn't sound like you did anything wrong, though it could be due to the tune or associated parts. But either way, the chance of this happening is just as likely when hitting boost on the road.

You wouldn't let a flat tire discourage you from driving on the road. Or a burnt out bulb discourage you from using your lights. Mechanical parts will always fail, but luckily, parts are replaceable. Go make some fun memories!
I get what you're saying, but a flat tire and a light bulb don't cost a lot of money whereas this turbo is gonna cost me around $2K.

I'll probably go back to the track after a while, but for now I have to get over the sticker shock.
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Old 02-11-2020, 12:12 PM   #30
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Originally Posted by noobultimatum View Post
The boomba causes compressor surge... that fluttering is no bueno for the turbo. Doesnt matter what excuses or BS you find where people justify it and what not.
Hopefully the new billet wheel will be able to withstand any surge damage. I do love the sound :-D
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Old 02-11-2020, 01:11 PM   #31
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Quote:
Originally Posted by glenmo View Post
Hopefully the new billet wheel will be able to withstand any surge damage. I do love the sound :-D
Consider what you're saying...."i hope the upgraded turbo that my BPV destroyed, can withstand the abuse this damaging part I put in causes" instead of fixing the source of the problem which is a part that clearly is known to be bad for the car.

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Old 02-12-2020, 02:20 PM   #32
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Consider what you're saying...."i hope the upgraded turbo that my BPV destroyed, can withstand the abuse this damaging part I put in causes" instead of fixing the source of the problem which is a part that clearly is known to be bad for the car.





+1
Why pour money into something and not fix the root cause.....
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Old 02-12-2020, 03:35 PM   #33
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You guys make an excellent point -- I didn't think of it that way. I can afford a new bpv-- the Cobb looks good.
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Old 02-12-2020, 03:41 PM   #34
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You wouldn't let a flat tire discourage you from driving on the road. Or a burnt out bulb discourage you from using your lights. !
I wouldn't let a flat tire keep me off the road.
But a burnt out bulb. . . .different story. You guys can play with fire if you want, I'm selling this car the minute the headlights burn out.

I saw my neighbor first hand pay that price. Burnt out bulb, haphazardly replaced it and continued use of the vehicle, IN THE DARK, and BAM, commercial airliner lands right on top of him. . . .and it was a convertible no less.

Coincidence? Some say so, but I know better.
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Old 02-12-2020, 03:47 PM   #35
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Originally Posted by glenmo View Post
I get what you're saying, but a flat tire and a light bulb don't cost a lot of money whereas this turbo is gonna cost me around $2K.

I'll probably go back to the track after a while, but for now I have to get over the sticker shock.
It is a large price tag. But my point is that while autocross may have added stress, your turbo was bound for failure regardless. I wouldn't blame it on autocross. There are cars with over 200k miles and still running the stock turbo.

Any mechanical part is more likely to fail when being pushed to the limits of enjoyment. But don't let this scare you from having fun with your car. If you're now scared of boost, you might as well trade in for an Impreza... You'll save on insurance premiums with that as well.

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I wouldn't let a flat tire keep me off the road.
But a burnt out bulb. . . .different story. You guys can play with fire if you want, I'm selling this car the minute the headlights burn out.

I saw my neighbor first hand pay that price. Burnt out bulb, haphazardly replaced it and continued use of the vehicle, IN THE DARK, and BAM, commercial airliner lands right on top of him. . . .and it was a convertible no less.

Coincidence? Some say so, but I know better.
Literally laughing out loud.
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Old 02-12-2020, 03:54 PM   #36
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You guys make an excellent point -- I didn't think of it that way. I can afford a new bpv-- the Cobb looks good.
Just put the stock BPV back on.
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Old 02-12-2020, 03:56 PM   #37
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It is a large price tag. But my point is that while autocross may have added stress, your turbo was bound for failure regardless. I wouldn't blame it on autocross. There are cars with over 200k miles and still running the stock turbo.

Any mechanical part is more likely to fail when being pushed to the limits of enjoyment. But don't let this scare you from having fun with your car. If you're now scared of boost, you might as well trade in for an Impreza... You'll save on insurance premiums with that as well.


Literally laughing out loud.
Yeah that was funny
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Old 02-12-2020, 04:36 PM   #38
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Just put the stock BPV back on.
^This
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Old 02-12-2020, 05:22 PM   #39
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Just put the stock BPV back on.
Bo-ring

Last edited by glenmo; 02-13-2020 at 08:41 AM. Reason: wrong quote
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Old 02-13-2020, 09:06 AM   #40
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Enjoy potentially blowing your turbo again then, man.

You have two paths to take with this car, and you're already down one.

Path 1 is improving the car to make more power in a less risky fashion without the scene points of a blow off valve which has less of a chance of blowing up.

Path 2 is ignoring the advice you asked for and putting on parts that you think are fun regardless if they even do anything for the performance of the car or not. At least the car won't be "bo-ring."

I think you're going to find that the vocal people in this FA20 community are very conservative, and for good reason in my opinion.

If you take path 2, which you seem to be going down, you're not going to get much support here.
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Old 02-13-2020, 09:53 AM   #41
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Originally Posted by glenmo View Post
Bo-ring
It just a bypass valve. Why use anything other than stock. It just recirculates the boost....


If you were going to get a blow off valve and go speed density, I would understand it a little better.
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Old 02-13-2020, 10:05 AM   #42
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The only reason I see to not go with stock, is that the stock BPV can sometimes fail to fully close when driving with fluctuations between 2-4psi. I have experienced some symptoms of this, usually only when hitting light boost while driving. It's never an issue when accelerating quickly or rapidly going between vacuum and boost.

There was a discussion a while back and it seemed like the Perrin bypass valve was a good option, as it's basically just a buffed up version of stock. Any additional opinions on this?
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Old 02-13-2020, 11:09 AM   #43
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Perrin and Nameless valves are good upgrades, but I've yet to have an issue with my stock valve and I'm nearly FBO and flex fuel tuned.

Edit: Just saw the COBB one, more than likely also a great choice.
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Old 02-13-2020, 11:28 AM   #44
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The only time I notice an issue is when I'm going up a long slight incline at highway speed, where light throttle input fluctuates boosts between 2-4 psi. The car basically feels like it has 0 boost under this circumstance and you can hear what sounds like a stuck bypass valve.

But the moment I give more throttle input, you immediately feel boost.

Seems spot on with some other experiences I have read. Not necessarily a failed factory BPV, just a spring that's not strong enough to fully close when it's being pushed/pulled by vacuum at that low boost interval.

Stage 2+ Protune, no boost leaks. Holds right at 19psi.
But 85k miles, so I'd expect some parts to start wearing out.
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Old 02-13-2020, 12:20 PM   #45
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Enjoy potentially blowing your turbo again then, man.

You have two paths to take with this car, and you're already down one.

Path 1 is improving the car to make more power in a less risky fashion without the scene points of a blow off valve which has less of a chance of blowing up.

Path 2 is ignoring the advice you asked for and putting on parts that you think are fun regardless if they even do anything for the performance of the car or not. At least the car won't be "bo-ring."

I think you're going to find that the vocal people in this FA20 community are very conservative, and for good reason in my opinion.

If you take path 2, which you seem to be going down, you're not going to get much support here.

I get it -- and you're right -- I did ask for the advice from a rather conservative group but there's got to be a happy medium between the stock bpv and all out compressor destruction. I'd like to find that sweet spot.
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Old 02-13-2020, 12:26 PM   #46
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I get it -- and you're right -- I did ask for the advice from a rather conservative group but there's got to be a happy medium between the stock bpv and all out compressor destruction. I'd like to find that sweet spot.
Yes i agree. Personally i am not convinced that your bpv destroyed the turbo, i would run it again without hesitation. Then if it happens again we will know for sure it was the source of the problem and then you can try another one.

Simple basic steps. Duhh!
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Old 02-13-2020, 04:14 PM   #47
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There has been zero conclusive evidence the BPV had anything to do with this.

Guy runs Bpv, guy blows turbo, therefore Bpv 100% had to be responsible let's not even consider another solution - that's the logic in this thread (and on this board).

This is all speculation. Treating people like they are stupid for not blindly believing something with zero evidence is the epitome of this board.
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Old 02-13-2020, 04:34 PM   #48
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There has been zero conclusive evidence the BPV had anything to do with this.

Guy runs Bpv, guy blows turbo, therefore Bpv 100% had to be responsible let's not even consider another solution - that's the logic in this thread (and on this board).

This is all speculation. Treating people like they are stupid for not blindly believing something with zero evidence is the epitome of this board.
My stock BPV melted around 20k. I've had a boomba on since then (now 70k) and the turbo blades look 100% new.

Goes hand and hand with people who think this engine is absolute junk because out of the 30k +/- sold a year in the US, you see 6/7 posts about a blown engine and its instantly a **** engine.
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Old 02-14-2020, 12:21 AM   #49
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Quote:
Originally Posted by GlarryHoodDIT View Post
There has been zero conclusive evidence the BPV had anything to do with this.

Guy runs Bpv, guy blows turbo, therefore Bpv 100% had to be responsible let's not even consider another solution - that's the logic in this thread (and on this board).

This is all speculation. Treating people like they are stupid for not blindly believing something with zero evidence is the epitome of this board.
Speculation is all I've got, though. I can't explain how the turbo got wrecked -- air intake filter was on the whole time, so the best current hypothesis is that there was either a defect in the compressor wheel that couldn't withstand the hard driving or the direction and pressure changes of the flutter produced by the bpv or there is a defect in the bpv that produced some debris that shredded the compressor wheel.

The turbo is getting replaced for sure, so the only other factor involved that I can imagine is the bpv. Replacing the bpv will cover all the bases...

I'm just trying to avoid this kind of hassle in the future, not **** on a company or a product.
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Old 02-14-2020, 12:29 AM   #50
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Is this normal?

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