Quieter Flutter

[miss_petepie]

After takin the ceffy to the pits today they have told me i need to "rectify loud induction noise" or the flutter on gear changes. I have an FMIC and a M's pod filter and space is extremely tight . Is there any way i can muffle the fluffer so its not so loud?

Its only on stock boost and i dont have space to build an enclosure around the pod.

Hopefully there is another way other than fittin all stock gear back on again cos for a start i dont have any of it

cheers mike

[fr0st]

If its fluttering your BOV isn't working too well... or if they just mean the woosh of the plumb back then see if you can find a stock air box to put on just for the pits.

[StuiE]

unhook the wastegate actuator rod (if it's internal) no boost = no noise, worked for a mate to pass pits

[jaik]

I had wicked induction noise on my cefi with standard turbo, standard boost and a HKS pod. I even put on a new pod and it was still too loud for them. basically i said it was complied like this and never came with an airbox so this level of noise must be acceptable.

Fight it

JK

[ricsvtr]

unhook the wastegate actuator rod (if it's internal) no boost = no noise, worked for a mate to pass pits

Correct me if I'm wrong but wouldnt that let the boost rise uncontrollably? ie. unhooking actuator rod means wastegate stays closed???

[342Four]

^^^ that seems right - i wouldnt diconnect the actuator rod - uncontrolled boost levels

the turbo will still spool even if the wastegate is not connected and could potentially damage your turb

ohh and rb20det ceffs never came with a factory BOV

[fr0st]

Without the actuator holding it in place the waste gate would open under throttle. The waste gate spring is surprising strong, theres a fair bit of force needed to hold the thing shut

[StuiE]

Correct me if I'm wrong but wouldnt that let the boost rise uncontrollably? ie. unhooking actuator rod means wastegate stays closed???

That's what I first thought, but that is what would happen if you disconnected the actuator hose, ie the spring would just hold it closed. if you take the rod off, the spring is doing nothing and the wastegate flap just swings around, and would open with no effort.

[342Four]

ohhhhhh - righteo then

cool - seems to be a quick fix then

[miss_petepie]

yeh at first i thought woud just make uncontrolable boost, then i thought about it some more if i disconnect the rod then jammed the wastegate open sum how then the turbo wod make no boost, car woud b a bit of a pig as a boost woud b just gettin blown straight out the wastegate hole. Ony thing i am worried about is the turbo could b free spinning and could damage it??.

Jai i tried arguin that point aready but the pit guy wouldnt have it his words were "well i could pass it like that but then u woud go gunnin down the road straight past mr plod then there is a big wooshy noise u get puled over a yellowed and ur back here again"

mike

[R31 POWER]

Just un hook the actuator rod, easy fix. Just make sure you dont loose the little circlip, but if you do just use some fine wire to hold it on. If you cant take the rod off lossen to two 12mm bolts on the actuator rod bracket.

[miss_petepie]

i might give this a try on the weekend and c how it responds. If that fails i got a BOV here i can hook up plumbed back that "should" quieten it down a bit.

[bubba]

Location of bov is also pretty critical if not using the factory location.. the genius that put the R2D2 on my car put it under the front right guard, leaving a good 1.5-2m of piping before the throttlebody. At light throttling-off I get massive flutter can probably adjust the bov but I cbf and will deal until I get the stocker on.