Sleeper Exhaust Set Up?

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
BigCave
Posts: 7
Joined: Tue Oct 25, 2016 9:10 pm
Car: 1993 NA Nissan 300zx Z32 (SOLD)
1978 Datsun 280z

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I live in a exhaust Nazi area of California and it is hard to express your individual creativity and love for cars. I want a nice performance exhaust but any tampering will be caught especially in orange county. So if you cant ditch your stock exhaust, why not keep its appearance but modify the sound??

I am planning on purchasing the stock test pipes for my Nissan 300zx that have fake cats on them and welding in two electronically controlled cutouts. Then ill keep the stock H-pipe and put on some nicer looking muffler from specialty Z.

If I tuck the cutout dump pipes up by the transmission, it should even be hard to spot unless a mirror is used.

Sound like a plan?


everpresentnoob
Posts: 152
Joined: Sun Sep 11, 2016 7:29 am
Car: 1990 300zx Base. Manual and abused by previous owner....

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why in the hell would you want cutouts on a NA z.... Thats just gonna sound horrible...

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NolimitZ32
Posts: 7042
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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^ this

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DCaff300ZX
Posts: 4202
Joined: Sun Jun 14, 2009 8:18 am
Car: .
1993 CRP TT- Modified
Location: Tacoma, Washington

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everpresentnoob wrote:
Tue Oct 10, 2017 6:22 am
why in the hell would you want cutouts on a NA z.... Thats just gonna sound horrible...

...and, continue to give them a reason to do it (be Exhaust Nazis).
Cutouts on an NA Z32? Wow... :confused:
A proper exhaust relieves pressure buildups and restrictions in order to make the engine's job easier and in the case of turbo(s) provide better throttle response, and usually without a lot of noise increase unless in very high HP cars.
Loud, obnoxious oversized exhausts that are more common these days do little of the former (make engine work better/easier) and more of the latter (useless noise), and is why there are "exhaust Nazi's" and also a LOT of others who do not appreciate that waste of effort and time, much less the assault on their eardrums.
Do everyone a favor and make it work as good as it looks AND sounds, not just loud and obnoxious only.

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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Not only that, but the N/A actually needs a bit of backpressure from the exhaust. Dumps will actually give you a small loss in hp.

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DCaff300ZX
Posts: 4202
Joined: Sun Jun 14, 2009 8:18 am
Car: .
1993 CRP TT- Modified
Location: Tacoma, Washington

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Ace2cool wrote:
Sun Nov 05, 2017 1:02 pm
Not only that, but the N/A actually needs a bit of backpressure from the exhaust. Dumps will actually give you a small loss in hp.
Very true...when I got my exhaust done for my NA, it took three tries to get the proper backpressure and make the car run as good as it sounded. Those three tries were 1) smaller Magnaflow mufflers, 2) smaller free-flowing cats, and 3) re-adding resonators and re-doing the rear pipe bends to the mufflers (very tight bends, easy to make them too abrupt) and slightly larger muffler tip exit diameters.
The final result was a nice sound without rasp (finally with the resonators back on and the muffler tip change) and a small bump in the midrange response. It sounded like an a$$ ricer before try #1, better sound but still some rasp and no power until 4500 rpm before try #2, and perfect after #3.


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