weird noise at 4 to 6k rpms

[Autox MSP]

I just broke in the car and decided to open her up a bit. I noticed a loud high screeching noise from the front. Its definitly not a turbine noise, does anyone have this too?? also what could it be??

 

[Mazdaspd035]

I posted something about a similar noise last weeks. My noise happened I think when I was in 2nd or 3rd 3000-3500rpms. The turbo went from it's normal whine to a howl. I don't know if it's normal but the car seems to be just fine to me. Since this is my first turbo car I don't know what tell you, but I know when I let my foot off the gas and begin to slow down the noise goes away, it is only when I am boosting that I will get the noise, which leads me to believe it's turbo noise, I still don't know if it's normal or not.

 

[changedman]

how fast were u going? over 75mph?

 

[KYMP5]

im not turbo, but the last noise my car made above 4k got my motor replaced.

 

[Striker187]

apparently this is normal for our car and turbo. everyone has it. it's a high pitched screech right? some say it's oil starvation....but on every car? there's no way you can really screw up an oil line....mazda's not that dumb.

 

[EVILSRT]

mazda's not that dumb.

are you sure?

 

[Autox MSP]

its like a metal screeching sound. I've owned a turbo car before and never made that noise.

 

[KyRaceFan]

its not oil starvation. Its probably the ball bearing design of our turbo.
Nothing to worry about.

 

[Black Majik MSP]

Stop worrying about the sound & enjoy it...I think anyone can tell you that high pitched whine is because of the BB turbo.

 

[Autox MSP]

uhm.... my friend owns a 240sx with a ball bearing t4. It doens't make that sound. its definitly not a normal noise.

 

[EvilMSP]

My car has random moments where the turbo goes super loud. It sounds like the same noise it always makes, just a little amplified (sounds tight). Never noticed any problem when it happens though.

 

[Autox MSP]

mine sounds more like metal to metal screeching

 

[Black Majik MSP]

uhm.... my friend owns a 240sx with a ball bearing t4. It doens't make that sound. its definitly not a normal noise.

You can't just compare a 240 with a non-factory engine to the MSP. Trust me, IT'S NORMAL.

 

[Autox MSP]

so all of you guys are getting that screeching nosie when you floor it at high rpms??

 

[505zoom]

I do, sounds like a rotational grinding of some sort. The first time I heard it I thought it was oil starvation, and then I heard of others who said the same thing. It does not sound normal to me.

EDIT: It's only on the highway above like 80 though, not just at high rpms.

 

[EvilMSP]

so all of you guys are getting that screeching nosie when you floor it at high rpms??

Not everytime, mine is very rare.

 

[Black Majik MSP]

OK, you guys need to take a ride in my car with the AC off, windows down, & stereo off (how I usually drive). It's a loud whistle sound & I know mine is the turbo. If there is any way I could record it, I would. If I'm not understanding you & you're talking about something completely different, then I don't know. Mine starts quietly at 4k but gets really loud at 5 & goes to redline.

 

[505zoom]

Nope got the whistle too and that sounds normal to me. But the noise I'm talking about (and autoxmsp as well) sounds like a metal grinding wheel, real inconsistent too.

 

[funnylittlman]

so all of you guys are getting that screeching nosie when you floor it at high rpms??

yes

 

[KyRaceFan]

Like I said, its the design of the turbo. My turbo makes it, and there have been other threads about it. It is NOT oil starvation, at least i highly doubt it is, and if it was, everyones turbo would blow up by 1000 miles... its NOTHING to worry about.