*boing* sound after induction

[JohnP]

i\'ve just fitted and induction kit.. never before has the car made such a weird noise.
 
If i accelerate hard, upto say 6k and come off throttle to change gear, i get a really weird *boing* sound.. like air pressure coming back through something it shouldnt. I dont think its the redundent breather that comes off the back of the engine (see below arrangement) doesnt do it everytime
 

 
i wouldnt of thought it was anything to do with the waterpump being unveiled now it doesnt re-circ?
 
Its a really crisp, high pitch noise and last for no more than 1/10th of a second. Its nothing mechanical and its definetly a noise made from something being under pressure.

[RedRummy]

dump vale?

[Laeeq]

the pipe just above the air pump has no hose on it so try connectin that to the small filter on its left...

[Jono FD3]

That noise is your air pump engaging!!! it\'s the draw through the air pump hose that is making this kift noise!!! every after market kit for the FD comes with a baffle to get rid of this noise, but not every one realises what it does...... sepcialy if you buy the kit second hand, you hardly ever get the baffle!!

Jono

[d-king]

the legendry mooooooo type sound thats like you have just run over a cow at 1100rpm lmao , its the air punp mate i had the same issue

[chopper2k22]

Whats the best way  of getting rid of the "cow" ?? iv put up with it but had enough of it now.

[Jono FD3]

Bin the air pump is the best way!!! easy if you have a power fc, but it will need a slight tweek to compensate!!

Jono

[interloper393]

you`d need blankin plates and a new belt to bud... and a decat pipe lol

[d-king]

the way i was told is , the pipe that should be attached to the airpump needs a bung putting in it to reduce the size of the bore , i used a piece of broom handle and drilled a 13mm hole down the centre of it lol can still hear it but not as bad

[interloper393]

heard the same, or cut a small metal plate and drill a few 2mm holes into it..

[Tango]

mine does the same sometimes..... in an odd kinda way...... i quite like it! make me chuckle every time:rollin   wont do any harm though will it??

[interloper393]

mine does the same sometimes..... in an odd kinda way...... i quite like it! make me chuckle every time wont do any harm though will it??

well your car might end up getting some bull lovin :rollin :rollin :rollin

[leon]

i can see the insurance claim now! :2Confused

Car Molelsted by bull.

[interloper393]

how bigs your exhaust pipe? might get stuck without a bit o lube lol

[d-king]

lmao !!!!!! no matter what it always comes down to this level :0)