increase in spooling noise ???

[pato]

yea so.. my turbo seems to be making a much larger spooling noise now.
does this mean my turbos on the way out ????
it still boosts fine and stuff, just makes more noise.


Cheers
Blake

[privatealpha]

Did you change to a pod filter?

[pato]

nope.
i just reread my first post and it sounds a bit bogan, so ill reiterate

I have a jzx100
about 120k kays, oil is about 4000km's old, and is allmost due for an oil change, but looks allright still.
blows no smoke, uses no oil. still boosts fine, still makes normal power.

doesnt exactly sound like metal in a blender, but is definatly more mechanical and louder than before.
stock intake system with split dump.

car has run 1bar of boost for the last 4 or so years without an issue, but about a week an a half ago, i removed the stock BOV, but havent driven the car really hard since.
on my way home from work the other day, the car started making the louder noises, and sort of "fluttering" while still accelerating on mid throttle
i immediatly plumbed the stock bov back, and yet it still does exactly as stated above.

anyone had anything similar ? should i start prepping my 35r to go on ?

cheers
blake

[KENut]

So is it the same noise, just louder?
That could suggest that the noise is being transitted (or not isolated as it was previously) through something

[Stomps]

nope.
i just reread my first post and it sounds a bit bogan, so ill reiterate

I have a jzx100
about 120k kays, oil is about 4000km's old, and is allmost due for an oil change, but looks allright still.
blows no smoke, uses no oil. still boosts fine, still makes normal power.

doesnt exactly sound like metal in a blender, but is definatly more mechanical and louder than before.
stock intake system with split dump.

car has run 1bar of boost for the last 4 or so years without an issue, but about a week an a half ago, i removed the stock BOV, but havent driven the car really hard since.
on my way home from work the other day, the car started making the louder noises, and sort of "fluttering" while still accelerating on mid throttle
i immediatly plumbed the stock bov back, and yet it still does exactly as stated above.

anyone had anything similar ? should i start prepping my 35r to go on ?

cheers
blake

hey Blake..

i had something similar happen to my old a70 when it had the td06 on it..

much louder spooling noise, almost a supercharges style whistle..

mine was damaged impeller blades.. not major.. still boosted up exactly the same.. but just more noisy... could be an easy place to start looking...

mine was caused by a tiny bit of rubber breaking off the inside of the intake pipe..

Stomps

[Dropbear]

Ok so the only thing thats changed recently is the BOV, when you say you removed the stock one I presume you fitted an after market one, correct? So the first place to look is at the new BOV connections, hoses etc and whatever you used to block off the stock hole for any leaks etc. Also the operation of the new one.

[pato]

nah drop i simply put a blocking plate on the flange that the stock one connects up to.
it is now removed and back to stock

stomps- cheers mate, i was giong to pull the intake piping off yesterday and have a looksies but since i was off work sick, i thought i better not strain myself
but ill check that out over the next few days.

Does this have the potential to do damage to my motor you recon ??

[mattysshop]

there a particular reason why you didn't want to run a BOV? Was this advice given from the JZX100 forums? i've been on there and have found alot of noobs doing silly things with the 'different' stock BOV the VVTi 1jz's use, for some reason everyone on there seems scared to just run a normal conventional BOV, and they insist on blanking off and not running one at all, or unpluging it.. or re-routing it, etc etc..

it has potential to damage the turbo, but not running a BOV, considering how cheaply they can be obtained is just not shouldn't really be done.. unless for example if your running 3psi on a 4afe (i'd prolly run some sort of free stock nissan one anyway).... but not 1 bar on a 1jz...

[mattysshop]

sorry i just had to rant a little about the JZX100 forums and how much the frustrate me you could have nothing to do with them, i don't know..

END RANT.

[Cuts]

I had a similar experience (with the fluttering under mid load).

Thinking back it happened when i ran the actuator line (for the wastegate actuator) from the plenum insted of the compressor cover.

Im not running a bov either btw, but running stock boost.

What exactly did you change immediatly prior to the increased noise?

[pato]

sorry i just had to rant a little about the JZX100 forums and how much the frustrate me you could have nothing to do with them, i don't know..

END RANT.

mate dont worry, ive been on toymods for 5 years, supramania for about the same and ive had a performance car before.
i can recognise retards when i see them.

i have run a gt35r without a bov at pressures in excess of 20psi for about 2 years now, with no problems whatsoever on a non vvti 1jz
the myth of the bov is an interesting one, and to err on the side of caution, i have reinstalled it exactly as stock specs dictate.


i did nothing just before the noises began. I am not a noob to these sort of things, i do not make a mechanical change, and then freak out when a noise changes.

the question is simply, for no mechanical reason the turbo spool is louder now than it was before. which may, or may not have been related to running the turbo without the stock bov for a certain amount of time.
NO running no bov is not causing the noise,
NO running any other sort of bov/lack of therfore flutter/ something, is not causing the noise

the only way the bov has any effect is on the condition of the turbo, which if bad, may be causing the excess noise.



Thanks again stomps, going to check it out tomorrow i think

[pato]

cuts,
iam running 14psi, allthough i have 3"split dump, and so even with the ebc off it still makes the same amount of boost.
actuator line is in stock location, and have not changed anything recently.

iam trying to build my track z20, and dont overly want to be spending excess amounts of $$ on the 100.

[Cuts]

from what ive heared/read the split dumps are the reason you cant get below 14 psi, but thats not the issue here.

understandable you dont want to spend the funds on it, sounds like my situ

Prehaps take the inlet off and check the compressor wheel, but then again you shouldnt have munched the compressor wheel unless some shit has got in there somewhere.

check shaft play, how many kms?

[Stomps]

from what ive heared/read the split dumps are the reason you cant get below 14 psi, but thats not the issue here.

understandable you dont want to spend the funds on it, sounds like my situ

Prehaps take the inlet off and check the compressor wheel, but then again you shouldnt have munched the compressor wheel unless some shit has got in there somewhere.

check shaft play, how many kms?

yeah, that's what i thought when it happened to me.. i was wondering how something got in there.. i always covered my turbo when working on the car and cleaned out the inside of the intake before putting it on.. same goes for filter..

mine was just due to a tiny... about 2mm X 1mm x 1mm bit of rubber cracking off the inside of my intake pipe.. it happened when i was driving around our local track.. something tiny when the impeller is spinning that fast can cause damage..

the only other issue i had which caused noise was when one of the cooler pipes got a small leak.. still made full boost, still ran fine (due to map sensor) but was really noisy...

maybe coz the turbos had to work harder to make the boost i had it set to.. might be worth looking at as well..

Stomps

[pato]

yea ive had the boost leak issue before on my non vvti 1jz,
the vvti ones have afm tho, but i did think of that.

ill def have to take it apart and have a look, so if there is any impella damage or shaft play etc.
it was just as i was driving home from work a couple days ago, nothing major really happened, it just started making noise.