Jesse H

iTrader: (1)

I fired up the car for the first time since the clutch and turbo install this morning just to check for leaks and problems. Didn't drive it since I don't have an ECU or injectors yet.

While revving it lightly, I do hear some turbo noises when I close the throttle and I'm trying to figure out what it is. I found this thread:

https://www.miataturbo.net/forum/sho...V+sound&page=2

It sounds more like the fluttering. I'm only at idle and not building any boost. I'm using the FM aluminum BOV which routes things back into the intake.



I suppose I should wait until I drive it to figure out if it makes the same noise when I'm actually boosting under load.

On a side note, what's the purpose for the one way check-valve for the carbon canister? I purchased this kit used and it wasn't included. Thanks!

edit:
don't know if you can view the video without an account
http://vids.myspace.com/index.cfm?fu...deoID=33145867

Saml01

iTrader: (9)

Put the video on youtube.

Jesse H

iTrader: (1)

http://www.youtube.com/watch?v=VamebVaP0SI

Unfortunately it's a huge file because of the digicam. You can hear it in the beginning and end of the video when I'm revving it.

A friend said he can make his Evo do that when he's driving with low load and low boost and let off the throttle quickly.

kotomile

iTrader: (24)

That's not the sort of thing that's usually included, not that I've seen anyway.

The check valve is meant to keep from pressurizing the charcoal canister.

wes65

iTrader: (7)

My car makes a similar sound that kind of sounds like a cricket. I think it is from the valve being slightly open when coming down from a light rev. I notice it when i am driving slowly around parking lots and stuff.

edit: I dont have sound at work so i didnt actually listen to the video, so i am just guessing.

Marc D

iTrader: (7)

my car also "flutters" on low speed driving, i dont think it has too much of an effect on the turbo, i would think that extreme pressures would cause problems (i.e. compressor surge due to lack of a BOV).

Braineack

iTrader: (62)

is BOV flutter, no worries. loosen the valve if you can.

Jesse H

iTrader: (1)

Thanks all!