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http://home.jam.rr.com/clonetek/cavitation.mpg


is this sound anything to worry about? if not i'm gonna leave it alone.. i almost wish it would do it louder so that it'd sound like the orange car.. LOL LOL

 

Hmmm... never heard that before... no idea...

 

Thats a wild noise. Soudns liek a rotor pack taking a crap. Thats alot of grinding sound....

 

its not really a grinding sound.. it's more of a whistling sound..
maybe the camera didn't do a good job of transfering the sound?

if it was a lot louder, it would sound like a vortech blower.
thats the sound it makes.

 

Does it do it more at idle? and in gear? What pulley do you have?


When I had my 6lber it would do it, but its normal....

 

mostly at idle.. and i have a 2lb lower pulley.
it went away when i pushed the throttle linkage..

 

Does is sound like a bunc of marbles being stirred around?

It's hard to tell from the vid...

 

Thats the normal sound then I think. Mine does it, JL's 99 & 01 did it, I heard it on his when I was at Cecil, Erics did it. Its just blower noise from idle...

 

Definitely a normal sound - mine has made that noise from day one.

 

That sounds to me like a loose belt, more than cavitation. It is really hard to tell from the video, but if you had some belt dressing(yes, I hate that sticky stuff too, but it will at least help you diagnose this problem), spray a little bit on the inside of the belt when it is running. If your noise immediately goes away for even a second, its belt noise.

Just to ease your mind that is an easy way to rule out the belt making the noise. When I put my 2# upper pulley on, it did the same sort of thing until I got another belt.

 

Sounds like it might be an idler pully bearing.

Try removing the blower belt & crank it up (don't rev it). This will tell you which belt is producing the noise. Then, using a stethascope (sp?) or long rod (several socket wrench extensions will do), listen to everything that rotates on the belt making the noise. Note: place your listening device on non-moving parts!

I had a Mustang 4.6 with Ford's S/C that had an idler pully noise simular to your noise.

 

i'll try to tinker around some this weekend..

 

Mine sounded like that with the upper and lower pullies. In park it didn't make the noise as loud, but in drive when the rpm's came down a little the noise was pretty loud. I've been living with it for about 8-9 months now.