sequential issues?

[nuki]

as mentioned in previous thread.. could this be anything related with my Blitz dump valve (bov)

[Lil-Steve]

If the BOV spring rate is too low you will loose boost pressure as it vents, you should be able to hear if it is loosing boost this way though, a hiss or shriek while at full boost should be very audible. Might be worth fiddling with the tensioner screw and see if it still has the sam problems.

[nuki]

so screw it which way? so the thread goes in (clockwise) or out (anticlockwise)? thanks.

[Lil-Steve]

Can\'t remember off the top of my head, have a look round on the web or failing that do it up a few turns if it\'s too weak you\'ll vent bost and it\'ll sound like it\'s venting pressurised air with loss of power.
 
Or if you do it up to much, you\'ll hear the WRC style "chirrup" noise when you lift off after being on boost or change gear at WOT. It\'s the pressure being veneted back through the turbos and out of the air filter, aviod if poss as older turbo designs may stall/damage may occur to the shaft and impeller.

[fil_auto]

Good chat here chaps and thanks Lil Steve - cheers for the pointer! I will investigate!!
Nuki - hope you find out it\'s something simple, like the BOV!

[nuki]

Well at the moment if im on over run all i can hear is a constant "shhhhhhhhhhhhh" of leaking air out the bov...

when i accelerate , if i let off the acceleration at 3000rpm i get the "cha cha cha cha cha cha" sound out the air filters.. if i let off at about 4000rpm i get cha cha sphshhhhhhhhhhhhhhhhh"
 
But my turbos are that noisy at spooling im not sure weather my BOV is leaking out slight pressure or not...

[Lil-Steve]

If you are getting both effects it could be a knackered spring or sticking piston, take it out and strip it down and have a play see what\'s going in.
 
Failing that I\'m afraid it may be new BOV time. While your at it check the IC pipes for leaks and splits check couplings and jubeliee clips.

[nuki]

ye ive been thinking it could be the BOV because it does make serious amounts of noise compared to my mates! anyway i\'ll let you know! thanks for your help Steve much appreciated.

[Lil-Steve]

Why don\'t you do him swappsies for 20mins and see if his works OK? :Giggle

[nuki]

thats wht i just thort im guna do