Help! Fludder sound

[lindsey34]

ever since putting on my FMIC and EBC whenever i run more than stock boost when i'm excelerating my car makes a flutter sound from the turbo side of the motor, i pulled my stock bov to check it but it seems fine, the cooler pipes are tight but i have not check the turbo outlet pipe cause i'll have to pull the other pipes off to get to it.

what else could it be, the more load the car is under the worse the flutter.

[JaFF]

not sure, but lucky its just a flutter

when i put my fmic in it seems to have maxed my ecu. i get a flat spot between 4500-5500 now. i'm gonna have to buy a new ecu (powerfc) or get a piggyback to fix it. much more expensive than i thought it would be :*(

[Angry]

get a decent BOV maybe....could that the stock BOV is getting more air that its able to vent ..well yea when ur running more than stock boost..

i could be mistaken though

anyone else got an idea on this?

[TTT]

lindsey34 - from what you say, it sounds like this happens when you are accelerating rather than while changing gears.. is this correct?

if so, sounds like a surge issue. I'm not too sure on a resolution. first time I have heard this happen on a stock turbo.

Jaff - all you might need to do is change the spark plugs and gap the new plugs to 0.8mm. go buy some $4 each plugs (ngk copper ones) and make sure the gap is 0.8mm. that should fix your flat spot.

[lindsey34]

yeah it during aceleration, i dont notice it as much on full throtle but the slower the revs build the more noticable.

[GunMetalR33]

Its not your BOV if it is happening on accelleration.

I tend to agree with GTST with this one. It sounds like compressor surge back past your turb. I am no expert on surge though, as I only have a stock turb and I didn't think that this ever happened on stock turbs.

[lindsey34]

do you think it could have something to do with a leaky turbo gasket?

[TTT]

no.... that tends to scream really loud on full boost, and sound like a lawn mover at low revs..

[lindsey34]

just tightned the turbo outlet(intercooler) pipe but have not tested the car yet.

i'm hoping that it not related to the wastegate actuator.

[lindsey34]

still ding it the more boost the worse it is.

i'm sick of driving with stock boost might call ice and see what they think.

[lindsey34]

still doing it the more boost the worse it is.

i'm sick of driving with stock boost might call ice and see what they think.

do you think it could possibly be the wastgate causing the problem.

you know when you excelerate how the pod makes the shhhhhhhhhhhh sound well when mine is boosted it sounds like shh, shh, shh, shh, shh, shh, shh, shh ? my brothers car has exact same mods but doesn't do it.

[aybee]

does the boost drop when this happens?

cause if it is compressor surge then the boost will drop when accelerating.

[tang0]

are you 100% that the ebc is plumbed in correctly ????

just a thought

[lindsey34]

i've tightend all the intercooler piping plus tightend the intake hose onto the front of the turbo and still no luck, i'm still sort of thinking that it might be the BOV?

[lindsey34]

I'm going to try another stock BOV, but first will I have to replace the gasket?

[TTT]

no the gasket is fine.

and I still highly doubt it's the bov.

what boost does this start happening at?

like at stock it's fine.. does it do it at 9psi? or 10psi?

play around with your boost controller.

start at stock and then increase by 1psi untill it starts happening..

and when it does happen, what does your boost gauge do? does it keep rising steady or does it move around when you hear sh sh sh sh sh ???

you are using an after market boost gauge right? not working off the stock gtst one i hope..