Nissan 370Z Forum - Question about the hiss/rattle after installing HFC's

Nissan 370Z Forum (http://www.the370z.com/)

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- - Question about the hiss/rattle after installing HFC's (http://www.the370z.com/intake-exhaust/6557-question-about-hiss-rattle-after-installing-hfcs.html)

I kinda like it, sounds like an angry cat.
http://i250.photobucket.com/albums/g...hmidt6/cat.jpg

Quote:

Originally Posted by Red370 (Post 247483)

I kinda like it, sounds like an angry cat.
http://i250.photobucket.com/albums/g...hmidt6/cat.jpg

Lmao very true, it's there with my test pipes and I don't care! Learn to love it.. Had same hiss in my 03 g coupe with res test pipes and greddy evo2 exhuast

Chuck that smiling dog pic of yours gets me every time I see it. Man Ive got to get a dog.

Quote:

Originally Posted by Pointman (Post 247517)

Chuck that smiling dog pic of yours gets me every time I see it. Man Ive got to get a dog.

its actualy a standard photo that this site offers as an option in the "User CP - edit avatar" settings link up top..

ill swap it for a real picture on of these days...

Quote:

Originally Posted by Red370 (Post 247364)

I initially thought there might be a leak, but when I had it up on the dyno, I stood underneath the car to listen and see if i could hear/feel a leak, none to report. Kinda sounds like a brake pad rubbing a rotor doesnt it? I notice it more when I'm in a walled in area like a parking garage, or between buildings.

Exactly. It has a metallic rubbing sound. In garages is when I notice it most as well, but if I listen closely I can hear it while driving on the street with the windows down.

Quote:

Originally Posted by fairladyZ34 (Post 247398)

if you dont put high flow cats or test pipes you wont get that hiss. its the only way to not have it. a resonated test pipe helps but the hiss is still there

I have stock cats and a stillen CBE and I have the hiss for sure. I also heard the hiss when I had the stock CBE and muffler removed. It seems that anything that reduces backpressure magnifies the sound.

I have ARK HFCs on my 370z with a TopSpeed Y and Amuse exhaust and yeah I hear the rattle when I am in reverse or rev. Glad I found this thread.