Stillen Gen3 Intake, Berk Hi-flow cat, and Stillen cat-back exhaust

frost · 05-09-2009, 08:56 PM

^ lol, I remember buying a hooker exhaust for my trans am, $350 just a couple years ago. But yeah, it's a little hard to stomach any issues when you have paid top dollar.

jpit · 05-10-2009, 01:55 AM

I have both the Stillen G3 intake and the Berk HFCs being delivered next week. After reading this thread and a few others I'm not sure now if they will both be going on. I am not interested in a hissing and raspy engine. Does anyone know exactly where these noises are coming from?
For those who have the HFCs and intake only are you experiencing any problems at all? Thanks.

t-ray · 05-11-2009, 12:33 PM

Danny, I just watched the video. Earlier in the thread I posted than on my car(an 05 g35), I have been through 8 exhaust configurations, and I've always had a hiss when decelerating in the lower rpms.

I see that your car exhibits the same behavior. In my case, after 3 years, the cause of the hiss is still unidentified. I hope for your sake that you are correct and the join/gasket is causing the leak/hiss. Good luck.

wstar · 05-11-2009, 02:31 PM

The hiss is apparently normal and nothing to worry about. It doesn't sound bad, there's no reason to complain about it really. The only concern was whether it was a leak, but even non-leaking exhausts have that sound.

As for rasp: compared to the stock exhaust, or say a mild exhaust on a big V8, there is some raspiness to the note. Mine was really bad at first, but that was due to a leak. With the leak fixed, I find the sound to be awesome. There's a little rasp in there, but it's just another subtle component of the sound, it's not a big fart can sound or anything.

FuszNissan · 05-11-2009, 02:29 PM

We cut a piece of rubber from a tire and placed it up in the cross members and exhaust to stop the rattle

JvKintheUSA · 07-31-2009, 12:41 PM

Quote:

Originally Posted by FuszNissan

We cut a piece of rubber from a tire and placed it up in the cross members and exhaust to stop the rattle

Doesn't the rubber melt? My Stillen exhaust rattles and I was thinking of getting a piece of tire rubber, but not sure that fix will last. What is your experience with the tire rubber FuszNissan?

FuszNissan · 05-11-2009, 02:39 PM

Are you sure the hiss isn't the intake???

spiderman · 05-11-2009, 02:50 PM

Intakes will give a hiss, that's the rush of air. I'm more concerned about any leaks/hisses coming from the catback exhaust, and having rattles due to clearance issues with the cross member. I'll guess I'll take Josh's word at Stillen and follow their instructions to the tee to see how the install comes out, as he said they addressed this. Wish me luck!

wstar · 05-11-2009, 02:53 PM

Quote:

Originally Posted by FuszNissan

Are you sure the hiss isn't the intake???

It could be, wouldn't be surprising. But I think others have reported it with the exhaust and no intake mods, too.

FuszNissan · 05-11-2009, 02:53 PM

Umm... haven't heard it in the exhaust.

semtex · 05-11-2009, 03:10 PM

Guys, it's not the intake, it's not the cat-back, it's the HFCs.

tru_Asiatik · 05-11-2009, 10:26 PM

FYI 100 mi after install of berks hfc and stillen cbe my ses/cel light came on
luckily amplifiedmotorsports is great with there customers and i will have it checked tomorrow i will keep you guys posted

tru_Asiatik · 05-12-2009, 07:54 PM

update: code was p0456 small evap leak
from what i gathered it could be a loose gas cap
or i might have a defective cap
last time i got the ses/cel light on i assumed it was the gas cap
so this is the second time it has happend(assuming since i never check the code 1st time i got the light)
is this covered under warranty? im afraid they might deny it as i just added my bolt ons and the dealer might blame it on them

BerkTech · 05-13-2009, 01:54 AM

The hiss that you guys hear as the revs drop in the 3-4K range is a well known sound when putting test pipes on any of the VQ motors. It applies to the 350Z/G35/G37. If any of you are previous Z/G owners then you are already familiar with the term "rasp". Test pipes will have the most pronounced hiss/rasp, HFC's with an aftermarket exhaust will have it as well if you know what to listen for. Resonated test pipes will help with reducing the rasp, but nothing short of the full OEM exhaust will completely eliminate it.

tru-asistik = if you've ruled out the gas cap, check the evap can lines in the rear of the car. They are on the passenger side right behind the exhaust tip. If you have a tiny leak there it will throw that P0456 code.

The hiss/whistle you hear from the intakes is the exact same thing as the test pipe hiss. Resonances also happen in reverse on the intake side.

RCZ's video of his Stillen CBE + HFC vid. You can hear it in there, not as prounouced as DannyGT's, but it's there. Thanks for posting the vids guys!
[youtubehq]6aIiNLfUnos[/youtubehq]

tru_Asiatik · 05-13-2009, 08:43 AM

^^thank you

05-11-2009, 02:31 PM	#4 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	The hiss is apparently normal and nothing to worry about. It doesn't sound bad, there's no reason to complain about it really. The only concern was whether it was a leak, but even non-leaking exhausts have that sound. As for rasp: compared to the stock exhaust, or say a mild exhaust on a big V8, there is some raspiness to the note. Mine was really bad at first, but that was due to a leak. With the leak fixed, I find the sound to be awesome. There's a little rasp in there, but it's just another subtle component of the sound, it's not a big fart can sound or anything. __________________ 7AT Track Car! Journal thread / Car setup details

05-11-2009, 02:29 PM	#5 (permalink)
FuszNissan A True Z Fanatic Join Date: May 2009 Location: St. Louis Posts: 14,275 Drives: Pure Sex Rep Power: 544	We cut a piece of rubber from a tire and placed it up in the cross members and exhaust to stop the rattle __________________ Mods: Too Many to list! LouFuszNissan ZDAYZ 2012

05-11-2009, 02:39 PM	#7 (permalink)
FuszNissan A True Z Fanatic Join Date: May 2009 Location: St. Louis Posts: 14,275 Drives: Pure Sex Rep Power: 544	Are you sure the hiss isn't the intake??? __________________ Mods: Too Many to list! LouFuszNissan ZDAYZ 2012

05-11-2009, 02:50 PM	#8 (permalink)
spiderman Base Member Join Date: Feb 2009 Location: Ellicott City, MD Posts: 57 Drives: PG Touring/Sport/6M Rep Power: 270	Intakes will give a hiss, that's the rush of air. I'm more concerned about any leaks/hisses coming from the catback exhaust, and having rattles due to clearance issues with the cross member. I'll guess I'll take Josh's word at Stillen and follow their instructions to the tee to see how the install comes out, as he said they addressed this. Wish me luck! __________________ *grateful to be alive ... grateful to drive!*

05-11-2009, 02:53 PM	#10 (permalink)
FuszNissan A True Z Fanatic Join Date: May 2009 Location: St. Louis Posts: 14,275 Drives: Pure Sex Rep Power: 544	Umm... haven't heard it in the exhaust. __________________ Mods: Too Many to list! LouFuszNissan ZDAYZ 2012

05-09-2009, 08:56 PM	#1 (permalink)
frost Retired admin Join Date: Dec 2008 Location: Winterfell Posts: 106,613 Drives: Your Wife Crazy Rep Power: 0	^ lol, I remember buying a hooker exhaust for my trans am, $350 just a couple years ago. But yeah, it's a little hard to stomach any issues when you have paid top dollar.

05-10-2009, 01:55 AM	#2 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 18	I have both the Stillen G3 intake and the Berk HFCs being delivered next week. After reading this thread and a few others I'm not sure now if they will both be going on. I am not interested in a hissing and raspy engine. Does anyone know exactly where these noises are coming from? For those who have the HFCs and intake only are you experiencing any problems at all? Thanks.

05-11-2009, 12:33 PM	#3 (permalink)
t-ray Base Member Join Date: Apr 2009 Location: bham al Posts: 91 Drives: 05 g sedan 6mt Rep Power: 18	Danny, I just watched the video. Earlier in the thread I posted than on my car(an 05 g35), I have been through 8 exhaust configurations, and I've always had a hiss when decelerating in the lower rpms. I see that your car exhibits the same behavior. In my case, after 3 years, the cause of the hiss is still unidentified. I hope for your sake that you are correct and the join/gasket is causing the leak/hiss. Good luck.

05-11-2009, 03:10 PM	#11 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 55 Posts: 5,995 Drives: People to drink Rep Power: 34	Guys, it's not the intake, it's not the cat-back, it's the HFCs. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

05-11-2009, 10:26 PM	#12 (permalink)
tru_Asiatik Track Member Join Date: Feb 2009 Location: so cal Posts: 793 Drives: 2009 370Z 6MT Rep Power: 272	FYI 100 mi after install of berks hfc and stillen cbe my ses/cel light came on luckily amplifiedmotorsports is great with there customers and i will have it checked tomorrow i will keep you guys posted __________________ Stillen G3 CAIStillen CBEBerk's HFCEibach ProkitHotchkis Swaysichiba 15/20mm spacers? Oil coolerStillen PulleyStillen Headers

05-12-2009, 07:54 PM	#13 (permalink)
tru_Asiatik Track Member Join Date: Feb 2009 Location: so cal Posts: 793 Drives: 2009 370Z 6MT Rep Power: 272	update: code was p0456 small evap leak from what i gathered it could be a loose gas cap or i might have a defective cap last time i got the ses/cel light on i assumed it was the gas cap so this is the second time it has happend(assuming since i never check the code 1st time i got the light) is this covered under warranty? im afraid they might deny it as i just added my bolt ons and the dealer might blame it on them __________________ Stillen G3 CAIStillen CBEBerk's HFCEibach ProkitHotchkis Swaysichiba 15/20mm spacers? Oil coolerStillen PulleyStillen Headers

05-13-2009, 01:54 AM	#14 (permalink)
BerkTech The370Z.com Sponsor Join Date: Jan 2009 Location: Irvine CA Posts: 279 Drives: Lots.... Rep Power: 274	The hiss that you guys hear as the revs drop in the 3-4K range is a well known sound when putting test pipes on any of the VQ motors. It applies to the 350Z/G35/G37. If any of you are previous Z/G owners then you are already familiar with the term "rasp". Test pipes will have the most pronounced hiss/rasp, HFC's with an aftermarket exhaust will have it as well if you know what to listen for. Resonated test pipes will help with reducing the rasp, but nothing short of the full OEM exhaust will completely eliminate it. tru-asistik = if you've ruled out the gas cap, check the evap can lines in the rear of the car. They are on the passenger side right behind the exhaust tip. If you have a tiny leak there it will throw that P0456 code. The hiss/whistle you hear from the intakes is the exact same thing as the test pipe hiss. Resonances also happen in reverse on the intake side. RCZ's video of his Stillen CBE + HFC vid. You can hear it in there, not as prounouced as DannyGT's, but it's there. Thanks for posting the vids guys! [youtubehq]6aIiNLfUnos[/youtubehq] __________________ While the others type fast... Berk Technology goes fast.... See you at the track! OUR NEW PHONE NUMBER: (714) 546-BERK READ THE BERK BLOG HERE Last edited by BerkTech; 05-13-2009 at 01:58 AM.

05-13-2009, 08:43 AM	#15 (permalink)
tru_Asiatik Track Member Join Date: Feb 2009 Location: so cal Posts: 793 Drives: 2009 370Z 6MT Rep Power: 272	^^thank you __________________ Stillen G3 CAIStillen CBEBerk's HFCEibach ProkitHotchkis Swaysichiba 15/20mm spacers? Oil coolerStillen PulleyStillen Headers

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