Nissan 370Z Forum - OBX Y Pipe: Hiss on coast down???

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Nissan 370Z Forum (http://www.the370z.com/)

- Intake/Exhaust (http://www.the370z.com/intake-exhaust/)

- - OBX Y Pipe: Hiss on coast down??? (http://www.the370z.com/intake-exhaust/34397-obx-y-pipe-hiss-coast-down.html)

RCZ	04-08-2011 03:29 PM

Get these exhaust tips, problem solved.

http://www.kerrdogkustom.com/images/288_Snake.jpg

Jordo!

04-08-2011 04:11 PM

Hmm.

These repsponses are making me think it's just a characteristic of the pipe. I may be going back to the old Y pipe then.

Dammit.

GZ3	04-08-2011 04:16 PM

Quote:

Originally Posted by Jordo! (Post 1042383)

Hmm.

These repsponses are making me think it's just a characteristic of the pipe. I may be going back to the old Y pipe then.

Dammit.

is it THAT loud?

Jordo!

04-08-2011 06:06 PM

I can hear it with the window up and AC on. I can hear it over the stereo unless it's cranked. So, yeah... a lot louder than I would like.

Monday we'll get it back on the lift to see if it's a leak or just a characteristic of the OBX Y pipe + S-tune CBE combo...

If so, I'll repair the old Y pipe (has a small, but inaudible, leak in the flex pipe) and this will be up for sale...

Jordo!

04-12-2011 10:29 PM

Quote:

Originally Posted by 6spd (Post 1040845)

just a side question, why'd you switch out the y-pipe?

Mainly to avoid repairing the cracked Nismo one, which I wound up having done anyway... also, thought it couldn't hurt to try.

Screw it -- I'll cheerfully sacrifice a few whp to not hear that hiss again :icon14:

6spd	04-12-2011 11:25 PM

right on

BLM	04-13-2011 10:00 AM

Quote:

Originally Posted by Jordo! (Post 1050433)

Okay, old Y pipe is back on, and problem solved.

Looks like going from the 3" outlet on the OBX pipe to the 2.5" of the rest of the CBE was causing the hiss.

Weird.

So... yeah, this is going up for sale shortly :p

If anyone wants to jump on it, feel free to PM me :D

Mainly to avoid repairing the cracked Nismo one, which I wound up having done anyway... also, thought it couldn't hurt to try.

Screw it -- I'll cheerfully sacrifice a few whp to not hear that hiss again :icon14:

The GTM 3" exhaust hisses too. I think it's mostly a result of the VQ harmonincs when paired to a less restrictive exhaust. Some set-ups will hiss more/louder than others, but as soon as you remove or replace the OEM cat's you're going to have some degree of hissing

CATCHINZZZS

05-03-2011 06:41 PM

Did you have cats or non res TPS. is therest stock on the rear

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