Is Turkey Harmful?

[HeHateMe]

It can't be compressor surge. Once a aftermarket CAI is put on, the turkey is the Air venting into the intake and resonating in the pipe. You have air being pulled in by the turbo, then air pushed in its way. I have heard compressor surge on my friends turbo fiero. It sounds like a whoosing not a gobble. How can the air i vent to the intake not be enough, so that the rest of the air travels down the hotpipe through my FMIC back up and to the turbo fins causing backpressure? Like some said maybe under 20psi we would get surge, but then we would here turkey+surge.

 

[mp5jeff]

It can't be compressor surge. Once a aftermarket CAI is put on, the turkey is the Air venting into the intake and resonating in the pipe. You have air being pulled in by the turbo, then air pushed in its way. I have heard compressor surge on my friends turbo fiero. It sounds like a whoosing not a gobble. How can the air i vent to the intake not be enough, so that the rest of the air travels down the hotpipe through my FMIC back up and to the turbo fins causing backpressure? Like some said maybe under 20psi we would get surge, but then we would here turkey+surge.

??the entire IC/piping system is pressurized....so when the TB closes, where's the air going to go? thats right...back to the turbo, and if your BOV doesn't get all that air in the system out fast enough, it will create compressor surge, just do some research 1st because no offense, but it looks like you don't really know what you are talking about. It doesnt matter what boost you run, you can run 1 psi and get compressor surge, it's when you run alot of boost that's when it really starts to ruin the turbo, why you ask, because more boost = what? more pressure going to the turbo. I have tried to explain this alot on this site, still seems no one wants to agree.

 

[mp5jeff]

here's an article i found that is a good writte up on compressor surge and the cause
http://www.motorsportsgrenada.com/features/tech/2005/June/article.htm
notice the compressor surge "sounds" as he puts it is a fluttering noise, aka turkey.

 

[BOOSTR]

Interesting article. With normal driving, this should even be an issue. Only under hard acceleration and shifting do I get the turkey sound. Hopefully the design/features of the turbo will offset any negative effects. I haven't noticed any increase in spool time.

 

[mp5jeff]

Interesting article. With normal driving, this should even be an issue. Only under hard acceleration and shifting do I get the turkey sound. Hopefully the design/features of the turbo will offset any negative effects. I haven't noticed any increase in spool time.

yea because under acceleration(load), you are creating more boost, intern creating more pressure in the pipes, then more air to go back into the turbo to create surge(if the bov/bpv doesn't get it out).

 

[daedalus]

??the entire IC/piping system is pressurized....so when the TB closes, where's the air going to go? thats right...back to the turbo, and if your BOV doesn't get all that air in the system out fast enough, it will create compressor surge, just do some research 1st because no offense, but it looks like you don't really know what you are talking about. It doesnt matter what boost you run, you can run 1 psi and get compressor surge, it's when you run alot of boost that's when it really starts to ruin the turbo, why you ask, because more boost = what? more pressure going to the turbo. I have tried to explain this alot on this site, still seems no one wants to agree.

ditto!!!! Someone finally speaks the truth. There is a reason high performance turbo cars dont turkey, ITS BAD.

 

[HeHateMe]

From the Article..."A compressor bypass valve (CBV) is a vacuum-actuated valve designed to release pressure from the intake tract of a turbocharged car when the throttle closes. It re-circulates the air back into the intake before the turbo inlet, but after the airflow sensor.

(This is whats on our cars)


The reason why most turbocharged cars have a CBV is that when the throttle closes and the intake system is under pressure, the high-pressure air entering the motor will bump into the closed throttle plate, and in the absence of a CBV, a pressure wave will travel back to the turbocharger. The result is that the compressor wheel will stall a phenomenon known as compressor surge and slow down very quickly. This is hard on the bearings and decreases the turbos lifespan, but it also means the turbo will take longer to spin up the next time the throttle is opened.

So the BPV helps, and if your BPV is aftermarket it flows better than stock reducing the risks of surge.

 

[sickspeed94]

(deadhorse

 

[PharmacyMSP]

Amazingly I'm one of only 32% of the people who answered Yes.....

Turkey = Compressor surge - Period. It is not due to the recirculated air back into the intake. There are two points for recirculating air. First and foremost is an effort to have some pressure on the intake side to keep the compressor wheel spinning and to fight surge (the pressure acting on the charge side that is both counterproductive in slowing down the compressor and detrimental to the bearings). On a lesser note I've heard some by pass proponents speak of the "efficiency" in that the air going back into the intake has already been filtered.

I have just recently finished a custom fmic project on my msp in which I have a dual-port Turbosmart bov. It is 50% recirc and 50% atmosphere. I virtually eliminated all turkey. I was amazed at the amount of air that is released during boost and I'm really only speaking of the 50% atmosphere side! (Stock boost) I challenge all people who don't agree that the turkey is compressor surge, to stick their hand in front of an atmosphere blow of valve that has been released after only 7psi and feel the amount of air coming out of damn thing. After which you'll know that charged air hits the fins and causes a little surge. Surge is almost impossible to completely eradicate given simple physics. Tuning (bov) is mainly an effort to minimize surge... maximize performance... and to protect the bearings. Sorry for the long ass thread. PEACE.

 

[PharmacyMSP]

If you don't have an atmospheric bov to see the amount of air, but still need a picture drawn, then go a fan in your house and speak into the fan in opposition of the blown air. Sounds pretty cool huh. Welcome to the concept of surge.

 

[doggman]

well seeing as a new bov is needed what about the turboXS type H-34 recirculatin bov. i havnt herd many persons talk about it but i was looking into purchasing this one and im wondering if it's a worth while buy. as well as helping ruduce the (in my case beloved turkey sound =( ) compressor surge.

thanks
-dave

 

[PharmacyMSP]

well seeing as a new bov is needed what about the turboXS type H-34 recirculatin bov. i havnt herd many persons talk about it but i was looking into purchasing this one and im wondering if it's a worth while buy. as well as helping ruduce the (in my case beloved turkey sound =( ) compressor surge.

thanks
-dave

Looks good. BTW our stock recirculation hose diameter is 19mm which is pretty damn close to 3/4" standard. I actually welded a custom 19mm fitting for my turbosmart. You can go this route or increase the diameter on your intake fitting to accomadate the 34mm. Good luck.

 

[apocman]

man I have a FMIC with hardpipes and a HKS SSQ BOV set to the lightest setting and I still get turkey as if your ******* right next to a turkey on crack the size of texas.

I do have a PSSSSSSSSSSSSSSTTTTTTTTTT real ******* loud and then followed by BU"DUL,BU'DUL,BU'DUL,BU'DUL>>>>>>>>>>>>>>>>>>>>>>>>the turkey.

 

[Notorious]

Try my expirement with capping off the bpv or use an open vent bov. It'll prove that it's compressor surge.

It can't be compressor surge. Once a aftermarket CAI is put on, the turkey is the Air venting into the intake and resonating in the pipe. You have air being pulled in by the turbo, then air pushed in its way. I have heard compressor surge on my friends turbo fiero. It sounds like a whoosing not a gobble. How can the air i vent to the intake not be enough, so that the rest of the air travels down the hotpipe through my FMIC back up and to the turbo fins causing backpressure? Like some said maybe under 20psi we would get surge, but then we would here turkey+surge.

 

[mp5jeff]

man I have a FMIC with hardpipes and a HKS SSQ BOV set to the lightest setting and I still get turkey as if your ******* right next to a turkey on crack the size of texas.

I do have a PSSSSSSSSSSSSSSTTTTTTTTTT real ******* loud and then followed by BU"DUL,BU'DUL,BU'DUL,BU'DUL>>>>>>>>>>>>>>>>>>>>>>>>the turkey.

yea that means your bov isn't releasing enough air...try to keep adjusting it

 

[MSPBlazinYellow]

I have an injen intake and i dont get a turkey. From what I understand the turkey is an loud audible squealing type noise. All I hear is and air fluttering sound coming from my car

 

[yashooa]

No, it is low fat (rockon) (evil) (rockon)

 

[yashooa]

I have an injen intake and i dont get a turkey. From what I understand the turkey is an loud audible squealing type noise. All I hear is and air fluttering sound coming from my car

That sir, is THE TURKEY!(naughty)
And at 12-15PSI she is a VERY loud, gobbling little HO!
I am at around 80k miles now and thus the far the Turkey has been my friend.

 

[Autox MSP]

its not the compressor surge. Besides turbos running such low boost don't even really require one.

 

[yashooa]

its not the compressor surge. Besides turbos running such low boost don't even really require one.

I think people are over "thinking" this one. It just sounds like air being violently spit back in the intake track and it is oh so cool (rockon)