Dynamic dampers in stock exhaust system

ARFCOM · 08-13-2010, 08:16 PM

What are the two dynamic dampers for in the stock exhaust system?

I came across them in a drawing of the stock exhaust system located in the 2009 370Z service manual.

m4a1mustang · 08-13-2010, 08:20 PM

They are there to counteract any resonance the stock pipes would cause without them.

1slow370 · 08-14-2010, 07:25 AM

add weight

ARFCOM · 08-14-2010, 01:32 PM

Quote:

Originally Posted by m4a1mustang

They are there to counteract any resonance the stock pipes would cause without them.

I'm not talking about the resonators.

If I get time later today I'll try and post a copy of the exhaust diagram that shows the dynamic dampers separate from the resonators.

m4a1mustang · 08-14-2010, 01:53 PM

Quote:

Originally Posted by ARFCOM

I'm not talking about the resonators.

If I get time later today I'll try and post a copy of the exhaust diagram that shows the dynamic dampers separate from the resonators.

Yeah, I know you weren't. You were talking about the dampers, which I was talking about as well.

The dampers you are talking about are designed to stop the pipes they are attached to from resonating at certain RPMs... they effectively change the weight of the piping and thus change the resonance frequency...

tbonesteak · 08-14-2010, 02:55 PM

what's interesting is the nismo exhaust doesnt have this.

m4a1mustang · 08-14-2010, 02:58 PM

Quote:

Originally Posted by tbonesteak

what's interesting is the nismo exhaust doesnt have this.

Totally different exhaust design... if it doesn't have them it doesn't need them.

ARFCOM · 08-14-2010, 10:02 PM

Quote:

Originally Posted by m4a1mustang

Yeah, I know you weren't. You were talking about the dampers, which I was talking about as well.

The dampers you are talking about are designed to stop the pipes they are attached to from resonating at certain RPMs... they effectively change the weight of the piping and thus change the resonance frequency...

So these dampers are some kind of weight that's bolted to the exhaust pipe?

I can't tell how they function from looking at the service manual diagram. I thought they were some kind of device that actually was inserted into the exhaust pipe and had a controlling device external to the pipes.

Thanks for the info. though!

m4a1mustang · 08-14-2010, 10:03 PM

Quote:

Originally Posted by ARFCOM

So these dampers are some kind of weight that's bolted to the exhaust pipe?

I can't tell how they function from looking at the service manual diagram. I thought they were some kind of device that actually was inserted into the exhaust pipe and had a controlling device external to the pipes.

Thanks for the info. though!

They are like mini hockey pucks. Let me put my pants on and I'll take a picture for you.

m4a1mustang · 08-14-2010, 10:07 PM

ARFCOM · 08-15-2010, 11:58 AM

Thanks for the picture Steve.

It looks like it's just a hunk of metal attached with a bracket.

What's that little shaft looking thingy that I see in the picture that's welded to the weight & then connects to the bracket for?

08-13-2010, 08:16 PM	#1 (permalink)
ARFCOM Base Member Join Date: Jul 2010 Location: Missouri Posts: 75 Drives: 2010 370Z Red 6 spd Rep Power: 14	Dynamic dampers in stock exhaust system What are the two dynamic dampers for in the stock exhaust system? I came across them in a drawing of the stock exhaust system located in the 2009 370Z service manual.

08-13-2010, 08:20 PM	#2 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	They are there to counteract any resonance the stock pipes would cause without them. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

08-14-2010, 07:25 AM	#3 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	add weight __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

08-14-2010, 10:07 PM	#10 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	__________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

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08-14-2010, 02:55 PM	#6 (permalink)
tbonesteak Track Member Join Date: Mar 2009 Location: Socal Posts: 914 Drives: MY09 MB 6MT Rep Power: 375	what's interesting is the nismo exhaust doesnt have this.

08-15-2010, 11:58 AM	#11 (permalink)
ARFCOM Base Member Join Date: Jul 2010 Location: Missouri Posts: 75 Drives: 2010 370Z Red 6 spd Rep Power: 14	Thanks for the picture Steve. It looks like it's just a hunk of metal attached with a bracket. What's that little shaft looking thingy that I see in the picture that's welded to the weight & then connects to the bracket for?