why does my car sound like it has a blow off valve?

[blinx9900]

just installed aem ems and now after 8krpms if i shift (or even just go into neutral) i hear a very LOUD kesshhhhh (soft k) sound, kinda like a bov but more of a short burst. any ideas on what it could be? here is the set up:

-b16b motor and lsd trans in a 96 civic cx hatch
-6 puck sprung clutch with 8lb flywheel + n1 pulley
-AEM EMS street tune (not complete yet still working on it)
-basic i/h/e internals are stock.

first it started doing it around 9k now its seems to do it at lower rpms too like above 8k, any ideas?

since were playing the "guess that noise" game i also got a grinding noise that comes from the timing belt area when my fan turns on, water pump maybe?

 

[kidkombo]

as crazy as it sounds, my b16b did the same thing when i revved it to 9k..i guess its normal

 

[blinx9900]

as crazy as it sounds, my b16b did the same thing when i revved it to 9k..i guess its normal

ok thats good to know, what mods did you have? similair to mine? anybody else having this happen? rvm i know you rev to 9k also...

 

[rvm]

ok thats good to know, what mods did you have? similair to mine? anybody else having this happen? rvm i know you rev to 9k also...

nope, no "bov" like sound with stock ecu or chipped ecu

do you feel that the car looses power at high rpms?

 

[blinx9900]

nope, no "bov" like sound with stock ecu or chipped ecu

do you feel that the car looses power at high rpms?

no, car pulls hard.

 

[rvm]

no, car pulls hard.

Hmmmmmmmm i have no idea , i will ask the mechanic next week