Beluga CBE with CNT Resonated Test Pipes

Dzel · 04-28-2013, 10:41 AM

So I found this exhaust through Shadezz

a fellow forum member. Now keep in mind that this is not a Fast Intentions top of the line type of exhaust. This exhaust was purchased for track use on my Z.

We installed it Friday night fired her up with no exhaust leaks. The following day I ran the car and noticed it hitting in some places.

I would have to jack the car up another 4 times to get it just right. I believe this could of been avoided if I had an experianced mechanic install it.

I am still having chatters on the crossmember hitting the exhaust every once in awhile. I plan to solve this issue next Friday. So here's a clip of the Z stock exhaust with Resonated CNT TP's and deleted rear resonators.

Now here's a couple of the Z with CNT TP's and the Beluga CBE.

Notice the hiss coming from the exhaust? This only comes about at high RPM's. I have done 3 leak checks with no luck of finding anything! I believe the hiss might be from the high flow due to the TP's. Any input would be appreciated!

Shadezz · 04-28-2013, 10:54 AM

After watching the videos...I think it does have to do with your test pipes.....I don't have them and planned on not doing them cause of the sound. I hear the hiss only under 2k rpm on yours...almost like a little blow off sound.

Can you post pics of yours connected to the test pipes?

Dzel · 04-28-2013, 11:00 AM

Yeah I'll post them up in a bit.

Dzel · 04-28-2013, 11:08 AM

Here's some pic's of the Y-pipe connection to the TP's.

Shadezz · 04-28-2013, 11:58 AM

Here are a few of mine without TP....

Left side

Right side

Shadezz · 04-28-2013, 12:07 PM

So I do think that the TP's have something to do with it....I would like some others to chime in about exhaust with Test pipes sounds...

Here is my video for those wondering without TP...

roplusbee · 04-28-2013, 02:08 PM

The hiss is pretty unavoidable...........unless you take great steps to mitigate it. A free-er flowing exhaust nets the hiss. I bothered me for a while, but I concentrate on the awesome gurgle that my exhaust makes on deceleration instead of the hiss, lol.

Dzel · 04-28-2013, 02:59 PM

Quote:

Originally Posted by roplusbee

The hiss is pretty unavoidable...........unless you take great steps to mitigate it. A free-er flowing exhaust nets the hiss. I bothered me for a while, but I concentrate on the awesome gurgle that my exhaust makes on deceleration instead of the hiss, lol.

Man I'm glad to hear that I was getting worried that there was a leak and that I could not find it. Do you think I'm creating more back PSI hence the hiss?

Grindkiezer · 04-28-2013, 04:00 PM

Yeah I have the same test pipes and mine hiss too, especially when I let off the gas and the car starts to slow down. But when upshifting it's like a little blow off valve

Dzel · 04-28-2013, 04:05 PM

I'm hoping to get some in car vids up later today. I wonder how it will sound with the MHI kit installed?

Shadezz · 04-28-2013, 06:20 PM

Quote:

Originally Posted by Grindkiezer

Yeah I have the same test pipes and mine hiss too, especially when I let off the gas and the car starts to slow down. But when upshifting it's like a little blow off valve

Is it just the CNT Test pipes then...or do others do the same? I do not plan to install test pipes, but wanna be sure if I ever do.

Grindkiezer · 04-28-2013, 08:42 PM

I only have experience with CNT resonated pipes, but I've heard other brands give you a hiss as well. It isn't a "leak" sounding hiss but really like a muffled BOV. When your windows are down it sounds amazing because it's right outside your window so the sound bounces off others cars around you and stuff.

But to try and answer your original question, no it's not just CNT pipes that hiss

Dzel · 04-28-2013, 09:57 PM

Does anyone have an idea on what I can do about the cross member hitting?

Grindkiezer · 04-28-2013, 10:00 PM

Does it rattle?

N0SL3N · 04-28-2013, 10:27 PM

Quote:

Originally Posted by Dzel

Does anyone have an idea on what I can do about the cross member hitting?

You can remove the 4 bolts and use washers to space the cross member down. Some people say not to but I don't see the harm.

04-28-2013, 10:41 AM	#1 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	Beluga CBE with CNT Resonated Test Pipes So I found this exhaust through Shadezz a fellow forum member. Now keep in mind that this is not a Fast Intentions top of the line type of exhaust. This exhaust was purchased for track use on my Z. We installed it Friday night fired her up with no exhaust leaks. The following day I ran the car and noticed it hitting in some places. I would have to jack the car up another 4 times to get it just right. I believe this could of been avoided if I had an experianced mechanic install it. I am still having chatters on the crossmember hitting the exhaust every once in awhile. I plan to solve this issue next Friday. So here's a clip of the Z stock exhaust with Resonated CNT TP's and deleted rear resonators. Now here's a couple of the Z with CNT TP's and the Beluga CBE. Notice the hiss coming from the exhaust? This only comes about at high RPM's. I have done 3 leak checks with no luck of finding anything! I believe the hiss might be from the high flow due to the TP's. Any input would be appreciated! __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C. Last edited by Trips; 04-28-2013 at 11:38 AM.

04-28-2013, 10:54 AM	#2 (permalink)
Shadezz Track Member Join Date: May 2012 Location: Colorado Age: 43 Posts: 896 Drives: 2012 Nissan 370Z Rep Power: 14	After watching the videos...I think it does have to do with your test pipes.....I don't have them and planned on not doing them cause of the sound. I hear the hiss only under 2k rpm on yours...almost like a little blow off sound. Can you post pics of yours connected to the test pipes? __________________ 2012 370Z BLACK EDITION/ FLT BLK Rays / 5% 3M Tint / DW's / Z1 SS & 2 Piece Rotors Nismo S-Tune OEM / Beluga CBE & Y-PIPE / DDX370 / GTR Start .4 Fluid / NST Blue Kit

04-28-2013, 11:00 AM	#3 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	Yeah I'll post them up in a bit. __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

04-28-2013, 11:58 AM	#5 (permalink)
Shadezz Track Member Join Date: May 2012 Location: Colorado Age: 43 Posts: 896 Drives: 2012 Nissan 370Z Rep Power: 14	Here are a few of mine without TP.... Left side Right side izzmo likes this. __________________ 2012 370Z BLACK EDITION/ FLT BLK Rays / 5% 3M Tint / DW's / Z1 SS & 2 Piece Rotors Nismo S-Tune OEM / Beluga CBE & Y-PIPE / DDX370 / GTR Start .4 Fluid / NST Blue Kit

04-28-2013, 12:07 PM	#6 (permalink)
Shadezz Track Member Join Date: May 2012 Location: Colorado Age: 43 Posts: 896 Drives: 2012 Nissan 370Z Rep Power: 14	So I do think that the TP's have something to do with it....I would like some others to chime in about exhaust with Test pipes sounds... Here is my video for those wondering without TP... __________________ 2012 370Z BLACK EDITION/ FLT BLK Rays / 5% 3M Tint / DW's / Z1 SS & 2 Piece Rotors Nismo S-Tune OEM / Beluga CBE & Y-PIPE / DDX370 / GTR Start .4 Fluid / NST Blue Kit Last edited by Trips; 04-28-2013 at 12:09 PM.

04-28-2013, 02:08 PM	#7 (permalink)
roplusbee A True Z Fanatic Join Date: Dec 2009 Location: Killeen, TX Posts: 2,360 Drives: 2007 350Z NISMO Rep Power: 23	The hiss is pretty unavoidable...........unless you take great steps to mitigate it. A free-er flowing exhaust nets the hiss. I bothered me for a while, but I concentrate on the awesome gurgle that my exhaust makes on deceleration instead of the hiss, lol. Jordo! and Dzel like this. __________________ 2007 350Z NISMO #0618: Zerolift \| UPREV \| F.I. \| Greddy \| Competition Clutch \| Injector Dynamics \| Aeromotive \| Pioneer \| JL

04-28-2013, 04:00 PM	#9 (permalink)
Grindkiezer Track Member Join Date: Sep 2012 Location: San Diego Posts: 824 Drives: A Car Rep Power: 14	Yeah I have the same test pipes and mine hiss too, especially when I let off the gas and the car starts to slow down. But when upshifting it's like a little blow off valve Dzel likes this. __________________ Z

04-28-2013, 04:05 PM	#10 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	I'm hoping to get some in car vids up later today. I wonder how it will sound with the MHI kit installed? __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

04-28-2013, 08:42 PM	#12 (permalink)
Grindkiezer Track Member Join Date: Sep 2012 Location: San Diego Posts: 824 Drives: A Car Rep Power: 14	I only have experience with CNT resonated pipes, but I've heard other brands give you a hiss as well. It isn't a "leak" sounding hiss but really like a muffled BOV. When your windows are down it sounds amazing because it's right outside your window so the sound bounces off others cars around you and stuff. But to try and answer your original question, no it's not just CNT pipes that hiss __________________ Z

04-28-2013, 09:57 PM	#13 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	Does anyone have an idea on what I can do about the cross member hitting? __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

04-28-2013, 10:00 PM	#14 (permalink)
Grindkiezer Track Member Join Date: Sep 2012 Location: San Diego Posts: 824 Drives: A Car Rep Power: 14	Does it rattle? __________________ Z

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