What are these pieces on the intake?

'10Anamoly · 09-07-2010, 01:59 PM

So, are these black pieces on the intake functioning as noise dampening resonators or something more complicated? If so, why do they have tubes running down near the valve covers it seems?

DarkZide · 09-07-2010, 03:05 PM

Looks like PCV tubing to me.

'10Anamoly · 09-07-2010, 03:21 PM

But why all the strange box shapes on there instead of straight tubing to the intake?

Cell · 09-07-2010, 03:30 PM

I believe it is to reduce the intake noise but I may be wrong.

Vegitto-kun · 09-07-2010, 03:33 PM

....intake noise?

Waiz · 09-07-2010, 03:37 PM

Vacuum lines?

daisuke149 · 09-07-2010, 03:54 PM

they are supposed to be resonators. how well or much they actually work.. well. tbh dont know

Jordo! · 09-07-2010, 04:08 PM

Quote:

Originally Posted by daisuke149

resonators

This.

spearfish25 · 09-07-2010, 07:14 PM

When you remove the big one on the driver's side to install the COBB tubes, the sound doesn't change at all. Perhaps Nissan was just trying to make the car heavier and bias even more weight up front...

Waiz · 09-07-2010, 08:17 PM

Here is the page with the part number, but I can't get a confirmation of the official part name from it:

165 Air Cleaner :: Fuel & Engine Control :: Genuine Nissan Parts :: 370Z Parts (Z34) 2009-2010 :: Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com

'10Anamoly · 09-08-2010, 10:05 AM

Yeah, the tubes coming to the intake pipes almost certainly are involved with the PCM system judging from their origin. However I wonder why all the funky shapes are involved and why only the driver side has the lower piece on it. I doubt it is to catch any buildup from the PCV because it does not have a drain hole or any service information with it either. My old cars had hard PCV pipes that went straight from the valve covers to the intakes with smooth bends and 90* angles. Interesting to note that none of the aftermarket intakes replace the molded black pieces, just provide connective material. Wonder if they know something we dont?

CBRich · 09-08-2010, 10:28 AM

These are usually resonators to cancel out louder tones at a certain RPM.

Jordo! · 09-08-2010, 09:03 PM

If it had a EGR type function, there's be a CEL for removing it. It's almost definitely just a resonator.

EDIT: Nope, they also are crankcase vents. Whoever said that before was right and I am wrong

G37sHKS · 09-08-2010, 10:35 PM

Quote:

Originally Posted by spearfish25

When you remove the big one on the driver's side to install the COBB tubes, the sound doesn't change at all. Perhaps Nissan was just trying to make the car heavier and bias even more weight up front...

lol?

1 LBS more is called heavier nowdays?

ProfessorDave · 09-09-2010, 08:47 AM

Quote:

Originally Posted by CBRich

These are usually resonators to cancel out louder tones at a certain RPM.

What a minute...cancel louder tones? Why would anyone want to do THAT!?!

09-07-2010, 03:21 PM	#3 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 15	But why all the strange box shapes on there instead of straight tubing to the intake? __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd

09-07-2010, 07:14 PM	#9 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	When you remove the big one on the driver's side to install the COBB tubes, the sound doesn't change at all. Perhaps Nissan was just trying to make the car heavier and bias even more weight up front... __________________ 2013 Cadillac V-Wagon, RIP Z

09-08-2010, 10:05 AM	#11 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 15	Yeah, the tubes coming to the intake pipes almost certainly are involved with the PCM system judging from their origin. However I wonder why all the funky shapes are involved and why only the driver side has the lower piece on it. I doubt it is to catch any buildup from the PCV because it does not have a drain hole or any service information with it either. My old cars had hard PCV pipes that went straight from the valve covers to the intakes with smooth bends and 90* angles. Interesting to note that none of the aftermarket intakes replace the molded black pieces, just provide connective material. Wonder if they know something we dont? __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd

09-08-2010, 09:03 PM	#13 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 417	If it had a EGR type function, there's be a CEL for removing it. It's almost definitely just a resonator. EDIT: Nope, they also are crankcase vents. Whoever said that before was right and I am wrong __________________ Enjoy it. Destroy it. Last edited by Jordo!; 09-25-2010 at 06:21 PM.

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09-07-2010, 03:05 PM	#2 (permalink)
DarkZide Enthusiast Member Join Date: May 2010 Location: TN Posts: 291 Drives: 2010 370z BC M6 Rep Power: 14	Looks like PCV tubing to me.

09-07-2010, 03:30 PM	#4 (permalink)
Cell A True Z Fanatic Join Date: Jan 2010 Location: Chicago Posts: 1,449 Drives: A Garbage Truck Rep Power: 21	I believe it is to reduce the intake noise but I may be wrong.

09-07-2010, 03:33 PM	#5 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	....intake noise?

09-07-2010, 03:37 PM	#6 (permalink)
Waiz A True Z Fanatic Join Date: Apr 2010 Location: SoCal Posts: 9,262 Drives: Z33 & GE8 Rep Power: 459	Vacuum lines?

09-07-2010, 03:54 PM	#7 (permalink)
daisuke149 My *** is famous! Join Date: Mar 2010 Location: Alpharetta, GA Posts: 4,849 Drives: 2013 Boss 302 PW Rep Power: 31	they are supposed to be resonators. how well or much they actually work.. well. tbh dont know

09-07-2010, 08:17 PM	#10 (permalink)
Waiz A True Z Fanatic Join Date: Apr 2010 Location: SoCal Posts: 9,262 Drives: Z33 & GE8 Rep Power: 459	Here is the page with the part number, but I can't get a confirmation of the official part name from it: 165 Air Cleaner :: Fuel & Engine Control :: Genuine Nissan Parts :: 370Z Parts (Z34) 2009-2010 :: Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com

09-08-2010, 10:28 AM	#12 (permalink)
CBRich A True Z Fanatic Join Date: Apr 2009 Location: SC Posts: 2,464 Drives: 370Z Rep Power: 544	These are usually resonators to cancel out louder tones at a certain RPM.