Question about the hiss/rattle after installing HFC's

Red370 · 10-22-2009, 12:14 AM

I kinda like it, sounds like an angry cat.

chuckd05 · 10-22-2009, 12:22 AM

Quote:

Originally Posted by Red370

I kinda like it, sounds like an angry cat.

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

Pointman · 10-22-2009, 12:39 AM

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

chuckd05 · 10-23-2009, 12:17 AM

Quote:

Originally Posted by Pointman

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...

spearfish25 · 10-23-2009, 08:24 AM

Quote:

Originally Posted by Red370

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

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.

elixxur · 11-15-2014, 02:32 PM

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.

10-22-2009, 12:14 AM	#16 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 296	I kinda like it, sounds like an angry cat. __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

10-22-2009, 12:39 AM	#18 (permalink)
Pointman Base Member Join Date: Aug 2009 Location: Pensacola, FL Posts: 128 Drives: 370Z Sport/Tour Nav Rep Power: 276	Chuck that smiling dog pic of yours gets me every time I see it. Man Ive got to get a dog. __________________ JTTF SQ8

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11-15-2014, 02:32 PM	#21 (permalink)
elixxur Base Member Join Date: Feb 2014 Location: Chicago Posts: 110 Drives: 13 370Z blk 6spd TS Rep Power: 11	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.