Put in my new S&B intake today and when I stomp on the gas I am getting a loud shuddering noise from the intake when I change gears. Also sounds like a squealing sound sometimes. Doesn't sound like other trucks that I have heard. Anyone have any idea what that could be?

 

sounds like you may finally be hearing your turbo spool and the excess pressure bleed off during gear shifts?

 

It sounds normal when I have it in the stock tune but when I put it na 60 or 80 horsepower tune it's shutters when it's releasing the pressure I'm sometimes makes like a squeal. Doesn't sound like the actual turbo but I could be wrong

 

That very well could be turbo surge. This is not good at all for your turbo and intake system. A new WW 2 or similar or an new turbo (38r?) will help with that. Until then I would keep it out of your hot tunes and take it easy on her.

 

What is a ww2? Why does installing a intake make things worse, thought it would help? This is crazy, just when i think i got the truck where i want it, something else happens

 

A wicked wheel 2, SPX turbo also makes a similar version which a lot of people like also.

It could be from more airflow being able to get to your system, but it also could have been there before and you have never noticed it through the muffled air box.


What did your turbo wheel look like when you pulled the old intake? Did you check the shaft for any in and out movement?

Is it possible you could have a leaking CAC boot too? Are they original? Have you ever tightened them?

 

New riff raff boots, the turbo wheel was checked a month ago with no play and good condition. Is there a way to tell if im going to screw up something? With the DP tune in a stock air box traveling uphill I heard it as well but very faint period after changing the intake it is very apparent. When I am sitting in the driver's seat it sounds like it is coming from the left side of the truck almost like a echo where the S&B intake hole meets up with the fender well

 

Does it sound like this?

Or this?

The first one is turbo stall / flutter / surge, which is not good. The second is a completely normal noise as the pressure blows off from the turbo.

 

mine sounds like the first times 10 . What can i do to prevent damage?

 

Ported housing or a different turbo wheel should help with the surge, the ported housing being the better option of the two, but of course it is also the most expensive option

Does this sound a bit more similar?
http://youtu.be/Q9VavmpGLtI

 

Thats it bud! Thanks for the verification, i thought i was going to spend days trying to explain what it sounds like. It sounds just like that but only last for probably a couple of seconds during gear changes if I'm in the pedal real heavy. And my still causing harm to the engine / Turbo?

 

There is no harm caused to your engine just from the surge, but you are putting a huge amount of stress on your turbo wheel and bearings. If your turbo were to come apart then there is the potential for some of the bits and pieces to make it through your IC and into your engine. Of course this is absolutely worst cause scenario, but is still a possibility.

The surge comes from having to much boost pressure trying to get into the engine, in your case when you let off the throttle the turbo is still trying to push pressurized air into your engine and can't. The air has to go somewhere and starts making its way back out of the intake. When it gets to the turbo the pressure coming back drops the RPM's on the turbo from 100,000+ to near zero. This is where the wear and stress on the turbo and bearings comes from. As mentioned the fixes are either a new compressor wheel (WW2 or SPX) which is by far the cheaper of the two options or a ported housing for your turbo. Both these options give the excess pressurized air a way to make it back past the turbo without causing it to slow too dramatically.

 

Great info guys! I was unaware of this but I'll definitely keep and eye on it when I start upgrading my intake!

 

1st generation wicked wheel all but cured my surge issues on a stock turbo with DP tuning. The gen II's are supposed to be a little better at it than the old one I had.

 

Holy crap, so if i fix the turbo is there going to be something to follow?