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[RACEPAK]

hey guys, so i installed a used turbo kit for a friend and we have a wierd whining sound when we hit 9 psi, it sounds like when you squish the end of a full baloon, or farting really fast from a small ass:)

this is an example of the sound on a srt 4:
SRT4 weird noise under WOT boost

i'v checked for vacume leaks and fixed everything,
tested the charge pipes for leaks,
replaced 3 blow off valves.
holds 10.3 psi like a champ.


anyone have an idea? first time i hear this type of noise on a car :S

my next tests are fuel pump/pressure. and the oring inside the compressor housing,

thanks

[dvst8r]

Pressurize the whole system at once. Probably a boot that is leaking.

[snm95ls]

Pressurize the whole system at once. Probably a boot that is leaking.

[RACEPAK]

Pressurize the whole system at once. Probably a boot that is leaking.

i did it, no air is leaking, from the charge pipes
i will check for leaks behind the compressor tommorow.

[SloS13]

That's a turboqueef

[PhilStubbs]

Something has to be leaking.

[Joseph Davis]

Why are you taking rippers on a car with a CEL?

[PhilStubbs]

I believe that's not the car in question, just a video he found making the same noise.

[Joseph Davis]

Piss wiffle.

[HiProfile]

Either the turbo is unbalanced, or something like a pcv valve is leaking oddly. How about a leaky wastegate?

[RACEPAK]

the pcv valve is drilled out and routed to the catch can along with the valve cover breather.
i think the turbo is good the spool sounds clean,

well. i tested the fuel pressure today (the car has a walbro pump fused and relayd from the battery and a OEM fpr,
the gauge shows 50 psi at idle, and it dosnt change when i dissconnect the vacume line,
it also dosnt change when i drive the car. odd one,

[Joseph Davis]

What OEM FPR?  SRT-4 are a factory returnless setup.

[PhilStubbs]

Funny how smart people can be so oblivious.

There is no srt-4.

[HiProfile]

wierd whining sound when we hit 9 psi

How about a leaky wastegate?

[Joseph Davis]

Funny how smart people can be so oblivious.

There is no srt-4.

I'm trying to have fun here.

[PhilStubbs]

Good cover

[RACEPAK]

solved:
it was the damn chinese plastic "T" from a fake hks bov that i used to increase boost for tuning,
one of the ports was closed!!!!!! :S
so the wastegate was closed all the time and the compressor port boosted out from the open side of the T, thats what caused the whistle!
i could never know it since i set boost cut for 10.3 psi :S


thanks guys!!!!!!11