ARK HFC...still have "hiss"

WAGAWAGA · 08-15-2012, 12:41 PM

Hi im Vinh, i am experiencing the smae thing. Alex at ARK told me we just need to get a cel fix.

Hi Im Vinh · 08-16-2012, 09:19 AM

Quote:

Originally Posted by WAGAWAGA

Hi im Vinh, i am experiencing the smae thing. Alex at ARK told me we just need to get a cel fix.

I already ordered the CEL fix off ebay for $8 a piece

speedfreek · 08-16-2012, 09:52 AM

You will always have hiss with the VQ engines. Some say it is the design of the exhaust and flowing more air when you add HFC,TP, or LTH. The pressure is trying to be equalized at the X,Y,H pipe for whichever design you have. The Nismo exhaust I know seem to not have it as the other designs cuz it is an H pipe. The other is when you take off the stock cats and put on the HFC's the walls on them are thinner than stock allowing the sound to escape. Whichever theory you believe the sound is here to stay. I am guessing since ARK put out a HFC stating it eliminates hiss that they used thicker walls to lessen the volume of the hiss. I would hate to know they reduced the flow of air to reduce the sound of the hiss.

08-16-2012, 09:52 AM	#3 (permalink)
speedfreek A True Z Fanatic Join Date: Feb 2012 Location: Huntsville,AL Posts: 1,724 Drives: '12 370Z PW 6sp Rep Power: 20	You will always have hiss with the VQ engines. Some say it is the design of the exhaust and flowing more air when you add HFC,TP, or LTH. The pressure is trying to be equalized at the X,Y,H pipe for whichever design you have. The Nismo exhaust I know seem to not have it as the other designs cuz it is an H pipe. The other is when you take off the stock cats and put on the HFC's the walls on them are thinner than stock allowing the sound to escape. Whichever theory you believe the sound is here to stay. I am guessing since ARK put out a HFC stating it eliminates hiss that they used thicker walls to lessen the volume of the hiss. I would hate to know they reduced the flow of air to reduce the sound of the hiss. __________________ Tomei\|Berk\|Takeda\|ZSpeed\|Fortune Auto\|Swift\|Eibach\|SPL\|Carbotech\|Motul\|Powertrix\|Stillen\|Aerojacket\|Z1\|Forgestar\|Enkei\|Project Kics\|Nismo Ti\|Llumar speedfreek's journal

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08-15-2012, 12:41 PM	#1 (permalink)
WAGAWAGA Base Member Join Date: Apr 2010 Location: riverside Posts: 155 Drives: 2010 370z Black Rep Power: 17	Hi im Vinh, i am experiencing the smae thing. Alex at ARK told me we just need to get a cel fix.