09 Nismo Z exhaust project

Fulljim · 03-16-2014, 12:14 AM

Ok ! Spring is alomst here in Canada and it smells like my Z with be at the shop to build the new exhaust soon. Every pieces as been hand polished ( pics later ) and they are looking great !

I have a question about my design ... I want to make the tube longer to have a deeper sound and I tought of making a "detour" before reaching the muffler.

Here's a beautiful drawing to illustrate my plan

photo.JPG

What do you guys think ?

Dzel · 03-16-2014, 12:24 AM

Awesome

Sent with TapAhoe

jdsto · 03-16-2014, 11:39 AM

I'm no expert but I had to take some fluid dynamics 25years ago in school, water in pipes, but air should not be that different. If my memory serves me bends will create resistance to flow and equal many feet of extra straight pipe. Why add restrictions to an exhaust, will this not be counter productive to performance?

Is the purpose of the build only for style and to make a specific sound, or are you hoping for performance gains?

Chuck33079 · 03-16-2014, 12:31 PM

That bend is bad news for flow.

Fulljim · 03-16-2014, 04:43 PM

My goal is performance but I want a deep sound as well

Fulljim · 03-16-2014, 04:50 PM

But I didnt mentioned that I'm gonna build an "optional" pipe for track
purpose only that will bypass the 2 resonators and that bend.

It will be detachable with v-bands ... So 10min before track day, i'll
switch to this straight pipe, thats the goal tho ....

Dzel · 03-16-2014, 05:20 PM

So what's the purpose of the bend?

Sent with TapAhoe

Fulljim · 03-16-2014, 07:24 PM

Longer tube = deeper sound

Megan370z · 03-16-2014, 07:54 PM

My opinion is you should play with different size of resonator and muffler for the deep sound instead of having unnecessary long exhaust tubing.

Chuck33079 · 03-16-2014, 08:09 PM

Quote:

Originally Posted by Megan370z

My opinion is you should play with different size of resonator and muffler for the deep sound instead of having unnecessary long exhaust tubing.

Yeah, extra length with some hard bends is a much worse solution than adding one or more additional resonators.

Fulljim · 04-08-2014, 12:57 AM

So it as begun.

At last the weather is more clever now here in Canada, so the Z is out since yesterday. At the shop, everything went well to remove the Nismo exhaust. This part is out and will be clean soon for sale.

I red alot about those devil cats bolts but never tought it was going to be THAT pain in the a** to remove. None of the cats are out yet, almost one but it still attached bye the faith of that devil bolt that I did cut. I tried to undo it the way it should, but I stripped it.

On the driver side, I have a problem. I don't have a direct acces like in the videos to unscrew it. A part of my steering assembly is blocking the way, so I can't even try to unscrew it ! Is that something special on the Nismo model ?

Anyways, can't wait to begin the fabrication of the new setup !

I'll keep this tread updated with pics in a few !

Sh0velMan · 04-08-2014, 11:52 AM

If you haven't already purchased an HKS muffler and all that...

Look at an Aero Turbine muffler... proven to flow better than a straight pipe while muffling sound.

Have one on my DD, sounds great.

Fulljim · 04-09-2014, 12:55 AM

Cats are out !!! Holly victory ...

Now time to fab !

Here is the genious welding that my friend does, this one is the conversion of those Berk HFC to V-band flange:

photo.jpg

Fulljim · 04-09-2014, 12:57 AM

Quote:

Originally Posted by Sh0velMan

If you haven't already purchased an HKS muffler and all that...

Look at an Aero Turbine muffler... proven to flow better than a straight pipe while muffling sound.

Have one on my DD, sounds great.

All were already purchased :/ but thx for the suggestion !

N0SL3N · 04-09-2014, 08:53 AM

Those are some nice welds

03-16-2014, 12:14 AM	#61 (permalink)
Fulljim Base Member Join Date: Mar 2013 Location: Qc, Canada Posts: 44 Drives: 09 Nismo 370Z Rep Power: 12	The design Ok ! Spring is alomst here in Canada and it smells like my Z with be at the shop to build the new exhaust soon. Every pieces as been hand polished ( pics later ) and they are looking great ! I have a question about my design ... I want to make the tube longer to have a deeper sound and I tought of making a "detour" before reaching the muffler. Here's a beautiful drawing to illustrate my plan photo.JPG What do you guys think ? Dzel likes this.

03-16-2014, 12:24 AM	#62 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	Awesome Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

03-16-2014, 11:39 AM	#63 (permalink)
jdsto Enthusiast Member Join Date: Feb 2014 Location: Toronto Posts: 250 Drives: Honda VFR800F 2015 Rep Power: 17	I'm no expert but I had to take some fluid dynamics 25years ago in school, water in pipes, but air should not be that different. If my memory serves me bends will create resistance to flow and equal many feet of extra straight pipe. Why add restrictions to an exhaust, will this not be counter productive to performance? Is the purpose of the build only for style and to make a specific sound, or are you hoping for performance gains? Chuck33079 likes this.

03-16-2014, 12:31 PM	#64 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	That bend is bad news for flow. Dzel likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

03-16-2014, 05:20 PM	#67 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	So what's the purpose of the bend? Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

03-16-2014, 04:43 PM	#65 (permalink)
Fulljim Base Member Join Date: Mar 2013 Location: Qc, Canada Posts: 44 Drives: 09 Nismo 370Z Rep Power: 12	My goal is performance but I want a deep sound as well

03-16-2014, 04:50 PM	#66 (permalink)
Fulljim Base Member Join Date: Mar 2013 Location: Qc, Canada Posts: 44 Drives: 09 Nismo 370Z Rep Power: 12	But I didnt mentioned that I'm gonna build an "optional" pipe for track purpose only that will bypass the 2 resonators and that bend. It will be detachable with v-bands ... So 10min before track day, i'll switch to this straight pipe, thats the goal tho ....

03-16-2014, 07:24 PM	#68 (permalink)
Fulljim Base Member Join Date: Mar 2013 Location: Qc, Canada Posts: 44 Drives: 09 Nismo 370Z Rep Power: 12	Longer tube = deeper sound

03-16-2014, 07:54 PM	#69 (permalink)
Megan370z A True Z Fanatic Join Date: Oct 2009 Location: Canada Posts: 1,156 Drives: 370z Rep Power: 24	My opinion is you should play with different size of resonator and muffler for the deep sound instead of having unnecessary long exhaust tubing. Dzel and Chuck33079 like this. __________________ Megan Journal Click Me ....................One Man Team Motorsport Click Me

04-08-2014, 12:57 AM	#71 (permalink)
Fulljim Base Member Join Date: Mar 2013 Location: Qc, Canada Posts: 44 Drives: 09 Nismo 370Z Rep Power: 12	Begining So it as begun. At last the weather is more clever now here in Canada, so the Z is out since yesterday. At the shop, everything went well to remove the Nismo exhaust. This part is out and will be clean soon for sale. I red alot about those devil cats bolts but never tought it was going to be THAT pain in the a** to remove. None of the cats are out yet, almost one but it still attached bye the faith of that devil bolt that I did cut. I tried to undo it the way it should, but I stripped it. On the driver side, I have a problem. I don't have a direct acces like in the videos to unscrew it. A part of my steering assembly is blocking the way, so I can't even try to unscrew it ! Is that something special on the Nismo model ? Anyways, can't wait to begin the fabrication of the new setup ! I'll keep this tread updated with pics in a few !

04-08-2014, 11:52 AM	#72 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 20	If you haven't already purchased an HKS muffler and all that... Look at an Aero Turbine muffler... proven to flow better than a straight pipe while muffling sound. Have one on my DD, sounds great. __________________ Buy My Car! \| Build Thread

04-09-2014, 12:55 AM	#73 (permalink)
Fulljim Base Member Join Date: Mar 2013 Location: Qc, Canada Posts: 44 Drives: 09 Nismo 370Z Rep Power: 12	Cats ... Cats are out !!! Holly victory ... Now time to fab ! Here is the genious welding that my friend does, this one is the conversion of those Berk HFC to V-band flange: photo.jpg

04-09-2014, 08:53 AM	#75 (permalink)
N0SL3N Enthusiast Member Join Date: Dec 2011 Location: Toronto Posts: 376 Drives: 2009 PG 370z 6MT Rep Power: 35	Those are some nice welds __________________ \| Akuma \| Motordyne \| Z1 \| NST \| CNT \| Stillen \| Avant Garde \| RJM \| Performix \| Tint \| LED \| GTR \| Nissan \|

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