[Twigger]

I just notice that under full boost and when I quickly let off the throttle it sounds like a small flutter. Just wondering if that was compressor surge or if that was normal bypass operation. I did not ever hear that with the stock airbox on. This is with 10 psi on a 57 trim if that makes any difference.

 

[snake eyes]

does it sound like the three stooges or more like a waWHOOSH! i have the same intake/recirc and im not noticing any problems, if it is i would check the vacum, as if thats kinked that might cause a problem

<l><l>

 

[MKIIIHATER]

it's the bosch, i believe it makes that surging kind of noise , no?

 

[Twigger]

So I should have been able to hear if it was surge with the stock airbox? The Bosch unit should be good for over 15psi, right?

 

[tissimo]

my friend is havnig a problem with his too.. on a 60-1 bolt on.. has an apexi filter, but wasn't a problem on the stock turbo.. will surge constantly.. ive tried my 110 bov as well as his 103 bov.. both do it..

 

[tkvtec]

my thoughts are that the air released by the bypass valve is rushing into the impeller creating that sound.

 

[Durrr]

at low boost, mine does it, but its kind of a flutter, definately not compressor surge.

 

[TaSe]

i have a CT26 on 8 PSI with the same intake and i think its just the stock bypass blowing off out of the filter.

 

[tissimo]

when my friend had the ct26 it sounded fine.. a woosh.. but now its deff surging.. tried 2 different bosch bovs.. not sure what the problem is

 

[highonoctane16]

when my friend had the ct26 it sounded fine.. a woosh.. but now its deff surging.. tried 2 different bosch bovs.. not sure what the problem is

mine is doing the exact same thing now justin. with the stock turbo i never had a single problem. I'm not even boosting right now until I get a different bov, cause im getting surge with the bosch. No problems at all in the past, and dont understand where the problem is now.. pretty weird.

 

[AZ87NA]

Like this? This is on 4psi with a 60trim CT26 and Bosch 110. :ugh2:

BOV Flutter Vid: Right Click/Save

 

[Twigger]

Like this? This is on 4psi with a 60trim CT26 and Bosch 110. :ugh2:

BOV Flutter Vid: Right Click/Save

Yeah thats what my 57 trim at 10 psi sounded like.

 

[AZ87NA]

Well, I noticed that the vacuum line to my BOV was pinched, which could have created a bad source for pulling the valve open at low boost...or so I've heard.

 

[tkvtec]

same sound I had

 

[Back2Basics]

I had compressor surge with stock air box, and other minor shit. Put in the 110, fluttering went away and became a woooosh.

 

[Durrr]

I was under the impression that the noise is not a problem... am I really getting compressor surge? lol... it goes away under high boost

 

[supra8795]

Where are you getting your vacuum source at? Up until yesterday i just figured any vacuum line on the car would be enough but it isnt. I used the vac nipple on the front of the intake manifold for my ssqv. Before i just teed into a line from the back of the manifold and it wasnt enough now my bov opens up at 3 psi.

 

[stratoayu]

thats no good guys.. im running a bosch.. ct-26 at 12 psi. and even at low boost i dont get surge.. i would say theres something not right with either ur hoses or the bov itself.

 

[Twigger]

Well I think I am going to go buy one of those vacuum nipples with the 90 degree angle. I think the vaccum hose might be getting pinched. Btw I am using the stock vacuum source.

 

[stratoayu]

as am i. ill try and get a sound clip tomorrow if one of my buddies is around at differnt boost levels. but yea.. i have NEVER had that sound. the bosch shouldnt do taht..