Hissing noise from 370z aftermarket exhaust system

ERZperformance · 08-20-2010, 03:24 AM

anyone experience hissing noise after installation of aftermarket catback exhaust.(low RPM usually when car just got to a stop light)

Trips · 08-20-2010, 03:43 AM

Yes, that is normal under deceleration of the motor

Jamaica · 08-20-2010, 03:53 AM

very normal.

370Zsteve · 08-20-2010, 07:26 AM

Mine doesn't hiss...but maybe it will when I install my HFC's?

m4a1mustang · 08-20-2010, 08:43 AM

Certain X-pipe configurations cause the hiss. It will be amplified by the addition of HFCs, TPs, or LTHs.

I know with FI's X-pipe, even with stock cats, there's a good bit of hiss on decel in low RPMs. I don't think the H-pipe systems hiss, and I know that the systems without a crossover pipe have no hiss at all. ZCarMan and Tooohip both run HFCs with the AAM V1 CBE (no crossover) and their cars have zero hiss.

Steve, as long as your Berks use an X-pipe crossover you'll probably pick up an audible hiss once you install your HFCs.

Note: I used "hiss" in every sentence of this post.

spearfish25 · 08-20-2010, 08:45 AM

Stillen CBE added a little hiss but after combining it with the ERZ HFCs the decel hissing got much more noticeable. Just a fact of life with this car.

m4a1mustang · 08-20-2010, 08:49 AM

It's just inherent to an X-pipe. H-pipes tend to sound "fuller" at lower RPMs vs. an X pipe, which sounds hollow. I used to run a off-road X pipe on my Mustang and there was a hiss-like sound from that at the low RPMs. Screamed like a banshee up top, though.

flashburn · 08-20-2010, 09:00 AM

I like the hiss.

m4a1mustang · 08-20-2010, 09:01 AM

Quote:

Originally Posted by flashburn

I like the hiss.

I hate it.

It sounds so cheap.

TX_370 · 08-20-2010, 09:04 AM

Quote:

Originally Posted by m4a1mustang

I hate it.

It sounds so cheap.

I hated it at first, but i like it now

red6spd · 08-20-2010, 10:41 AM

FI Cat-Back No Resonaters... Bring on the HISS!!!!!!!!!!!!!!!!!

JB1 · 08-20-2010, 03:27 PM

I went from stock to BERK HFC with stock exhaust, then added the Berk Exhaust (X-pipe) and now I'm back to stock cats and Berk exhaust. In my experience:

HFC = Hiss
HFC + x-pipe CBE = More hiss
Stock cats + X-pipe CBE = no (to me noticeable) hiss

All in all I like my current set up the best, nice added volume, no drone, no hiss.

Red__Zed · 08-20-2010, 04:30 PM

Quote:

Originally Posted by m4a1mustang

Certain X-pipe configurations cause the hiss. It will be amplified by the addition of HFCs, TPs, or LTHs.

I know with FI's X-pipe, even with stock cats, there's a good bit of hiss on decel in low RPMs. I don't think the H-pipe systems hiss, and I know that the systems without a crossover pipe have no hiss at all. ZCarMan and Tooohip both run HFCs with the AAM V1 CBE (no crossover) and their cars have zero hiss.

Steve, as long as your Berks use an X-pipe crossover you'll probably pick up an audible hiss once you install your HFCs.

Note: I used "hiss" in every sentence of this post.

Except the second sentence...

m4a1mustang · 08-20-2010, 04:33 PM

Quote:

Originally Posted by DanGizinski

Except the second sentence...

Damn!

In my defense I could scramble some words in that sentence to spell "hiss."

kielbasa16 · 08-20-2010, 04:55 PM

Quote:

Originally Posted by m4a1mustang

Certain X-pipe configurations cause the hiss. It will be amplified by the addition of HFCs, TPs, or LTHs.

I know with FI's X-pipe, even with stock cats, there's a good bit of hiss on decel in low RPMs. I don't think the H-pipe systems hiss, and I know that the systems without a crossover pipe have no hiss at all. ZCarMan and Tooohip both run HFCs with the AAM V1 CBE (no crossover) and their cars have zero hiss.

Steve, as long as your Berks use an X-pipe crossover you'll probably pick up an audible hiss once you install your HFCs.

Note: I used "hiss" in every sentence of this post.

It will be amplified by the addition of HFCs, TPs, or LTHs.

No you didnt.

Crap! I lose.

08-20-2010, 03:24 AM	#1 (permalink)
ERZperformance A True Z Fanatic Join Date: May 2009 Location: Hayward Posts: 3,015 Drives: Nissan GTR Rep Power: 22	Hissing noise from 370z aftermarket exhaust system anyone experience hissing noise after installation of aftermarket catback exhaust.(low RPM usually when car just got to a stop light) __________________ http://www.cntracing.com http://www.ERZperformance.com 800-363-8599 Last edited by ERZperformance; 08-20-2010 at 03:51 AM.

08-20-2010, 03:43 AM	#2 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,730 Drives: 🔰 Rep Power: 10	Yes, that is normal under deceleration of the motor __________________

08-20-2010, 07:26 AM	#4 (permalink)
370Zsteve A True Z Fanatic Join Date: Sep 2009 Location: Gold Coast CT Posts: 10,599 Drives: 2019 Corvette G.S. Rep Power: 43	Mine doesn't hiss...but maybe it will when I install my HFC's? __________________ SOLD MY Z MARCH 2018 - another Core OG moves on - new ride 2019 Z Corvette Grand Sport - no mods necessary but already have eyes on HFC and intakes LOL IT NEVER ENDS.

08-20-2010, 08:43 AM	#5 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	Certain X-pipe configurations cause the hiss. It will be amplified by the addition of HFCs, TPs, or LTHs. I know with FI's X-pipe, even with stock cats, there's a good bit of hiss on decel in low RPMs. I don't think the H-pipe systems hiss, and I know that the systems without a crossover pipe have no hiss at all. ZCarMan and Tooohip both run HFCs with the AAM V1 CBE (no crossover) and their cars have zero hiss. Steve, as long as your Berks use an X-pipe crossover you'll probably pick up an audible hiss once you install your HFCs. Note: I used "hiss" in every sentence of this post. ortiz73ca likes this. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

08-20-2010, 08:45 AM	#6 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Stillen CBE added a little hiss but after combining it with the ERZ HFCs the decel hissing got much more noticeable. Just a fact of life with this car. __________________ 2013 Cadillac V-Wagon, RIP Z

08-20-2010, 03:53 AM	#3 (permalink)
Jamaica A True Z Fanatic Join Date: Mar 2010 Location: SoCal Posts: 15,362 Drives: Under boost Rep Power: 73	very normal.

08-20-2010, 08:49 AM	#7 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	It's just inherent to an X-pipe. H-pipes tend to sound "fuller" at lower RPMs vs. an X pipe, which sounds hollow. I used to run a off-road X pipe on my Mustang and there was a hiss-like sound from that at the low RPMs. Screamed like a banshee up top, though. ortiz73ca likes this. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

08-20-2010, 09:00 AM	#8 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 19	I like the hiss. 370Zsteve likes this. __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

08-20-2010, 10:41 AM	#11 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	FI Cat-Back No Resonaters... Bring on the HISS!!!!!!!!!!!!!!!!! Z_Enthusiast likes this. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

08-20-2010, 03:27 PM	#12 (permalink)
JB1 Track Member Join Date: Mar 2009 Location: Chicagoland Posts: 748 Drives: 09 Nissan 370Z sold Rep Power: 17	I went from stock to BERK HFC with stock exhaust, then added the Berk Exhaust (X-pipe) and now I'm back to stock cats and Berk exhaust. In my experience: HFC = Hiss HFC + x-pipe CBE = More hiss Stock cats + X-pipe CBE = no (to me noticeable) hiss All in all I like my current set up the best, nice added volume, no drone, no hiss. 370Zsteve likes this. __________________ Black Fangs // Black rear Valance // Berk CBE // COBB post MAF tubes // K&N drop in filters // Setrab Oil Cooler // Stillen Sway bars // Z1 SS brake lines // Stillen brake cooling kit // Harness bar //

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