Compressor surge? help!

[mwracing]

Can someone briefly describe how compressor surge sounds like on our 7MGTE motors with CT26z.

I have a 60 trim CT26 with all stock exhaust and intake pipes...

I noticed when i rev up driving or even staying still, my stock Recirculating BOV makes a flapping noise. like " flap flap flap flap..."

Which sounds cool for a bit... until i looked closer.. popped the hood, disconnected the vacuum line from the recirc, and still heard it.. then i pinched the recirc pipe nearly closed enroute to AFM pipe, and it still make that noise when i revved it up. So i pretty much diagosed the noise isnt coming from the BOV area.. but more from the intake filter area ( guessing its compressor surge and noise coming through K&N filter..)


Am i right?

 

[supramike7m]

it will sound like a fluttering release of air when you let off the gas. if your bov is working right, it wont flutter, it will be one burst of air. just try adjusting you bov. thats if its aftermarket. from what you said it sounds like surge.

 

[wardog]

Its time for a bosch bov just use the search button and it ll give u all the info on this bov since u still stock everything. Good Luck

 

[supra_ed]

u know, my ssqv made the same sound- fluttering. i just thought it was the insert in the bov. maybe i had surge issues also.........

 

[wardog]

On yours supra ed u just need to play with it :naughty: u know the bov screw. I just had the same problem with my Greddy Rs and all i did is adjusted the spring and no more turkey wobbling noises ( surge )..lol good luck let us know when u both fix the problems any imput is good imput...

 

[mwracing]

well yeah, i will let the community know when i fix it and how i fixed it.

im probably replacing it with an aftermarket BOV and adapter flange.

hope that fixes it.. anyone know the stock piping size?

 

[AaronsSupraMKIII]

I adjusted my BOV last night. It was not venting either. Luckily I don't think I have any compressor damage from it. I never boosted over 7 PSI.

 

[Poodles]

it's a stock BOV, and they usually fail open...

check your vacuum lines as that's usually the case...

 

[MDCmotorsports]

A 60 trim shouldn't surge in a ct26 housing.... Sounds to me like a fubar BOV system.

 

[supra_ed]

On yours supra ed u just need to play with it :naughty: u know the bov screw. I just had the same problem with my Greddy Rs and all i did is adjusted the spring and no more turkey wobbling noises ( surge )..lol good luck let us know when u both fix the problems any imput is good imput...

i didnt think ssqv had adjusting screw

 

[Poodles]

early ones did, as do the knock offs...

 

[Keros]

My 7M sounds exactly like this when I shift:

http://www.youtube.com/watch?v=OuNTnA5A2Fo

I have a stock BOV... that probably has ALOT of kilometers on it. If the stocker usually fails open, how can I have compressor surge due to the BOV? Could it be caused by something else?

 

[supra_ed]

early ones did, as do the knock offs...

mine is authentic/ newer. i know its installed right (common sense) and im running vacuum to it- pain in ass since bov is located behind bumper. anybody esle's ssqv make the fluttering noise instead of higher pitch "chirp"??

 

[Poodles]

Keros: vacuum lines

 

[88YotaTurbo]

Mine did until I threw it out and replaced it with the bosch. Now it is a nice whoooosh of air and instant boost recovery no more shift lag.

 

[Brady]

mine is authentic/ newer. i know its installed right (common sense) and im running vacuum to it- pain in ass since bov is located behind bumper. anybody esle's ssqv make the fluttering noise instead of higher pitch "chirp"??

i would also like to know how this is done witht he newer ones or if we are shit outta luck

 

[supra_ed]

lack of adjusting screw on ssqv is a selling point for hks. u dont need one because of the sequential valve design. easier to tune with- which is why im using it instead of my blitz

 

[Poodles]

it shouldn't need one because of the design. In reality it might not even need a spring to begin with...