My ST has lost boost and I can't find the cause

[Mega ST]

Next thing would be to remove the O2 housing and look at turbine.

 

[RCode]

I thought there might be smoke to, but I found a few threads that had the same issues as I'm having. No smoke reported. But still, it won't be difficult to check with how much I have off the car already. It'll be a couple days but the turbine is what I'm checking first.

 

[cidsamuth]

Late to the party …. but did you say you checked the wastegate solenoid, it’s wiring, and the tubing?

 

[RCode]

Late to the party …. but did you say you checked the wastegate solenoid, it’s wiring, and the tubing?

Yes, the wastegate starts closed as it should. Tubing is fine, since it's brand new as well as the solenoid. There is not any air pressure going into the solenoid to open the wastegate at all. I suspect that air pressure comes from the compressor, and well since the compressor isn't spinning it would make sense that no air is sent there.

 

[dhminer]

Blown turbo means upgrade time! Good luck, keep us posted

 

[TyphoonFiST]

Throttle Body hose*

 

[RCode]

So ya, turbine is toast.


Definitely sucks, but I can't complain to much with how much I've put this car through. I'm tempted to get an upgraded hybrid turbo, but for the extra cost I'm not sure it's worth it, Ford sells the stock turbo for 800. I think the cheapest hybrid is 1400 on Whoosh. Definitely open to ideas, but I don't track the car anymore since it's the daily now and just leave all seasons on for the cold. So more power would be fun, but would definitely spin the tires more.

Just some notes, it has been very, very hot here. I park in an underground garage, so I start the car in cooler Temps, then drive it into much hotter Temps. So maybe combined with age, heat and the way I've driven the car I imagine the blades just stress cracked and gave in. The compressor spins, but the turbine doesn't, so I wonder if the shaft snapped in half.

Another thing, the BPV was definitely getting stuck, when I replaced it, I heard the BPV making noise where as previously it was not. I almost wonder if it got stuck, and maybe somehow overspun the turbo? But just a guess, I thought the BPV blew off intake air into the compressor.

Glad I found it, and nothing else appears to be damaged.

 

[FiestaSTdude]

So ya, turbine is toast.
View attachment 57786

Definitely sucks, but I can't complain to much with how much I've put this car through. I'm tempted to get an upgraded hybrid turbo, but for the extra cost I'm not sure it's worth it, Ford sells the stock turbo for 800. I think the cheapest hybrid is 1400 on Whoosh. Definitely open to ideas, but I don't track the car anymore since it's the daily now and just leave all seasons on for the cold. So more power would be fun, but would definitely spin the tires more.

Just some notes, it has been very, very hot here. I park in an underground garage, so I start the car in cooler Temps, then drive it into much hotter Temps. So maybe combined with age, heat and the way I've driven the car I imagine the blades just stress cracked and gave in. The compressor spins, but the turbine doesn't, so I wonder if the shaft snapped in half.

Another thing, the BPV was definitely getting stuck, when I replaced it, I heard the BPV making noise where as previously it was not. I almost wonder if it got stuck, and maybe somehow overspun the turbo? But just a guess, I thought the BPV blew off intake air into the compressor.

Glad I found it, and nothing else appears to be damaged.

That’s definitely shot!
You could also see if anyone on the forum has a low miles turbo that they’d let go for cheap.

 

[dhminer]

So ya, turbine is toast.
View attachment 57786

Definitely sucks, but I can't complain to much with how much I've put this car through. I'm tempted to get an upgraded hybrid turbo, but for the extra cost I'm not sure it's worth it, Ford sells the stock turbo for 800. I think the cheapest hybrid is 1400 on Whoosh. Definitely open to ideas, but I don't track the car anymore since it's the daily now and just leave all seasons on for the cold. So more power would be fun, but would definitely spin the tires more.

Just some notes, it has been very, very hot here. I park in an underground garage, so I start the car in cooler Temps, then drive it into much hotter Temps. So maybe combined with age, heat and the way I've driven the car I imagine the blades just stress cracked and gave in. The compressor spins, but the turbine doesn't, so I wonder if the shaft snapped in half.

Another thing, the BPV was definitely getting stuck, when I replaced it, I heard the BPV making noise where as previously it was not. I almost wonder if it got stuck, and maybe somehow overspun the turbo? But just a guess, I thought the BPV blew off intake air into the compressor.

Glad I found it, and nothing else appears to be damaged.

Well that’s a bummer, but I’d definitely take the opportunity to go for an aftermarket turbo. Having the power band extend past 5500 rpm really changes the car for the better.

 

[dhminer]

That’s definitely shot!
You could also see if anyone on the forum has a low miles turbo that they’d let go for cheap.

I polished up my OEM turbo and have it on the bookshelf in my office as decoration lol

 

[RCode]

It's tempting to go aftermarket, I mean I just spent 400 on a new solenoid and bpv, which is halfway the cost of the OEM turbo that includes both of those. I also didn't realize a hybrid turbo would pull further past 5500, I bet the car is stupid fun like that.

Is that MRX turbo on the classifieds better than a cheaper X47 or even Whoosh's 1400 hybrid turbo? I want something plug in play, so I would need to do some research on that one but it's tempting.

Edit: So Moutune is suggesting a downpipe is needed with it. I'd rather not spend the extra on a downpipe, or change out the cats. I realize it's probably for the better, but do they all require an upgraded downpipe?

 

[dhminer]

It's tempting to go aftermarket, I mean I just spent 400 on a new solenoid and bpv, which is halfway the cost of the OEM turbo that includes both of those. I also didn't realize a hybrid turbo would pull further past 5500, I bet the car is stupid fun like that.

Is that MRX turbo on the classifieds better than a cheaper X47 or even Whoosh's 1400 hybrid turbo? I want something plug in play, so I would need to do some research on that one but it's tempting.

The Mountune turbo (which is a Garrett) won’t have much boost below 4,000 rpm. Will feel like classic 90s turbo lag then a huge kick in the ass when it spools up and pull hard to 7k (tuners will all raise your redline on a true big turbo setup). It’s plug and play “ish” because it uses a 3 bolt to vband adapter on the exhaust manifold which is a crap solution IMO. Will at WOR fabrications makes a modified stock manifold with a Garrett-sized vband to eliminate the adapter, which is what I’m running with my gtx2860. It also doesn’t have an integrated BOV, so you’ll have to put a BOV on the hot side pipe or symposer port which means more cost. For a daily driver, I’d go with a whoosh hybrid that’s truly plug and play so you can reuse your newly purchased BPV for a while, at least until it fails but that’s purely a matter of your preferred powerband.

 

[RCode]

The Mountune turbo (which is a Garrett) won’t have much boost below 4,000 rpm. Will feel like classic 90s turbo lag then a huge kick in the ass when it spools up and pull hard to 7k (tuners will all raise your redline on a true big turbo setup). It’s plug and play “ish” because it uses a 3 bolt to vband adapter on the exhaust manifold which is a crap solution IMO. Will at WOR fabrications makes a modified stock manifold with a Garrett-sized vband to eliminate the adapter, which is what I’m running with my gtx2860. It also doesn’t have an integrated BOV, so you’ll have to put a BOV on the hot side pipe or symposer port which means more cost. For a daily driver, I’d go with a whoosh hybrid that’s truly plug and play so you can reuse your newly purchased BPV for a while, at least until it fails but that’s purely a matter of your preferred powerband.

Oh that actually sounds like a lot of fun, but probably best I avoid it. 1499 without the wastegate is a lot to. I'll keep an eye out for a low mileage/not installed one. You've really got my interest with power above 5500.

 

[Mega ST]

So ya, turbine is toast.


Definitely sucks, but I can't complain to much with how much I've put this car through. I'm tempted to get an upgraded hybrid turbo, but for the extra cost I'm not sure it's worth it, Ford sells the stock turbo for 800. I think the cheapest hybrid is 1400 on Whoosh. Definitely open to ideas, but I don't track the car anymore since it's the daily now and just leave all seasons on for the cold. So more power would be fun, but would definitely spin the tires more.

Just some notes, it has been very, very hot here. I park in an underground garage, so I start the car in cooler Temps, then drive it into much hotter Temps. So maybe combined with age, heat and the way I've driven the car I imagine the blades just stress cracked and gave in. The compressor spins, but the turbine doesn't, so I wonder if the shaft snapped in half.

Another thing, the BPV was definitely getting stuck, when I replaced it, I heard the BPV making noise where as previously it was not. I almost wonder if it got stuck, and maybe somehow overspun the turbo? But just a guess, I thought the BPV blew off intake air into the compressor.

Glad I found it, and nothing else appears to be damaged.

Wow! That worth displaying on your book shelf! I made one of my failed turbo's an ash tray, not that I smoke. Lol. Shaft definitely snapped then turbine contacted the housing or turbine contacted the housing and then the shaft snapped. Good thing it was the turbine and not the compressor which could've sent shrapnel into the motor

 

[akiraproject24]

My tuner raised me to 7200 with the whoosh. I didnt ask for any redline specific so I think its like a default for him. Ive only taken it there during datalogs as well

 

[RCode]

So just curious on everyone's thoughts, upgrading to a new turbo would probably cost me around 2500 all in. Whoosh hybrid turbo, catted down pipe, a new BOV, upgraded wastegate and a revised tune from Stratified.

Versus the stock turbo, between 750-850 for the OEM from Ford. Plus a 250 core charge, assuming I get that back with a damaged turbo.

So that's a difference of 1600ish. Keep in mind, the car is a daily on all seasons since my BRZ is the fun/track car. But I also don't see myself getting rid of this car anytime soon. I loved driving the GR Corolla, but it didn't feel as playful. The Integra Type S is my current favorite, but 50k is a lot!

There's also the X47 classic which costs quite a bit less than Whoosh. I don't need anything crazy, but if the turbo pulls beyond 5500 I imagine the car feels stupid fast. I guess I'm just trying to figure out if the cost is worth it, I am a terribly indecisive person!

 

[dhminer]

So just curious on everyone's thoughts, upgrading to a new turbo would probably cost me around 2500 all in. Whoosh hybrid turbo, catted down pipe, a new BOV, upgraded wastegate and a revised tune from Stratified.

Versus the stock turbo, between 750-850 for the OEM from Ford. Plus a 250 core charge, assuming I get that back with a damaged turbo.

So that's a difference of 1600ish. Keep in mind, the car is a daily on all seasons since my BRZ is the fun/track car. But I also don't see myself getting rid of this car anytime soon. I loved driving the GR Corolla, but it didn't feel as playful. The Integra Type S is my current favorite, but 50k is a lot!

There's also the X47 classic which costs quite a bit less than Whoosh. I don't need anything crazy, but if the turbo pulls beyond 5500 I imagine the car feels stupid fast. I guess I'm just trying to figure out if the cost is worth it, I am a terribly indecisive person!

The hybrid comes with a wastegate and you can use your stock BPV on it, at least until it fails. You can also use stock downpipe as it won’t really hold back the hybrid. If I were in your shoes, I would buy a hybrid and a tune only and replace the stock BPV if/when it fails. If my fiesta were a daily driver, I’d have a whoosh hybrid, st200 intake, Cobb cat-back, lowering springs and that’s it besides a few cosmetic things

 

[RCode]

The hybrid comes with a wastegate and you can use your stock BPV on it, at least until it fails. You can also use stock downpipe as it won’t really hold back the hybrid. If I were in your shoes, I would buy a hybrid and a tune only and replace the stock BPV if/when it fails. If my fiesta were a daily driver, I’d have a whoosh hybrid, st200 intake, Cobb cat-back, lowering springs and that’s it besides a few cosmetic things

Well I do have a brand new BPV now so I should have some time before it goes. The Whoosh site seems to imply you'll want to upgrade the wastegate, but it appears the standard one is included on it. Would the stock cat wear down faster without the upgraded downpipe and high flow cat? It's an issue for my dad's supercharged Mustang, but that's quite the different car.

I'm going to order the turbo gaskets from Ford, as well as the exhaust manifold gasket. I think it'll be easier to take off the manifold with the turbo.

 

[dhminer]

Well I do have a brand new BPV now so I should have some time before it goes. The Whoosh site seems to imply you'll want to upgrade the wastegate, but it appears the standard one is included on it. Would the stock cat wear down faster without the upgraded downpipe and high flow cat? It's an issue for my dad's supercharged Mustang, but that's quite the different car.

I'm going to order the turbo gaskets from Ford, as well as the exhaust manifold gasket. I think it'll be easier to take off the manifold with the turbo.

I just checked Whoosh and was incorrect about the wastegate - that is an additional cost. I don’t recall seeing any reports of the stock cat wearing down. You could always put the stock on and keep an eye on the classifieds here and snag a used aftermarket one when they inevitably pop up.

It’s definitely easier to take the turbo and manifold off together. Stock/hybrids are small enough you can get them in and out from above with the cowl off.

 

[akiraproject24]

Could def skip the dp and do a 14 psi wastegate with an upgraded bov (turbosmart shortie pb for less noise and recirculated air or dual port for that 90's turbo goodness)