09 Nismo Z exhaust project
 

First time posting on this site :)

I have a project in my head and I need your toughs about it. I will fabricate
a custom single exit exhaust for my 09 Nismo 370Z and I'm thinking about the parts I should get.

From front to back:

BERK HFC
Vibrant "Y" pipe
in the middle: Flowmaster hushpower DBX 14 in ( will it fit? )
slight curve to get to an HKS 170mm muffler

all in 409 stainless, mandrell bands, 3in piping, TIG welded and V-Bands at strategic points so I can change my setup if I want to.

Performance wise, I think i'll get something with that setup. The real question is, WILL IT SOUND GREAT in your opinion ?????


I'm open to your critics! :tiphat:

Just buy an exhaust. That's my critique.

i say do it and let us know how it goes, you should do a 3.5in exhaust though since it will be single exit, you could also modify a 350z single exit exhaust to fit the 370z


only problem, no single exit exhausts that are reasonably priced, amuse makes one but thats over 2k and is a major rip off

Custom
 

Making one custom is a part of the challenge, so I'll don't just buy one.


You think 3.5 in is the way to go? They say 1 in per 100 hp. And yes the VQ37 is supposed to have 350 HP, but really it is 280 at the wheels.

The Amuse R1 uses what piping ? 3.5 or 3 in ??

Here's my personal setup

http://farm8.staticflickr.com/7346/1...5b665c0a_c.jpg

Running on 170mm Titanium Hi-Power muffler (largest muffler that HKS offers)
Custom welded the inlet from 3 inch to 2.5 inch
2.5 inch stainless steel pipings
Custom Y-pipe (on it's way)
Z1 test pipes

And believe me, it is a beast with just a 2.5 inch of piping and stock Y-pipe!

Ouff!
 

Any resonator? do you have a pic of underneath the car?
Soud clip ?

Thx !!!

Go with a Magnaflow over the Flowmaster. The Flowmaster sound good but don't flow as much as the Magnaflow. My 2cent.

i feel 3.5in would be the way to go for a single exit, 350z ones as well as the amuse R1 is 3in

the reason i say 3.5in is because it will flow a little less than true dual 2.5in and you still have some room if you decide to FI your car down the road vs being bottlenecked by a 3in single exit exhaust

Do it and post vids on the sound! Always in for hearing new things!

Or he could just go with my 3.5''exhaust setup which is already quite optimized for an all-out N/A Power and this would avoid him a lot of time and cost on parts/tube/fitting/TIG time ;)


...

meeh just kidding...

good luck on your personal project !! ;) and post a couple videos once its done !


:merrychristmas:

Forgot that you have the exhaust for sale. ;) It would make a nice stocking stuffer.

Its absolutly sure that I will keep you informed in this project with pics and
videos. Cant yet decide if it's gonna be 3 or 3.5 in tho .... You guys
have put some doubts in my head :confused:.

Keep posting ideas ! I like that. I'll check for magnoflow as well :)

BTW, yes my Nismo S-tune exhaust will be for sale way before
summer, and its gonna be dirt cheap ... Like dirt dirt cheap :)

wait you got rid of your nismo exhaust for the nismo stune?

why?

No No No !!

I get rid of the Nismo exhaust to fabricate a new one, from scratch.
So I'll be selling the one that's on my Nismo for dirt cheap.

:driving:

lmfao ah kk

just to let you know, the nismo s tune and the nismo exhaust are 2 completely different exhausts

also you can get about $500 for your nismo exhaust, that should cover the cost for a exhaust shop to fabricate something up for ya

In fact, me and my friend will fabricate it. He has a nice shop so I will
do it with him.
I will probably sell it for like 150$ and the person will pay the shipping since i'm located in Canada.

Can't wait to do that !!! And hear it !

What do you guys think of the 18 in Vibrant resonator over the flowmaster ?


And where is the cheapest place to buy an HKS muffler ?

:ugh2:

Partzzz !
 

So most of the parts are in!

HKS muffler, Resonators and Berk HFC !

Its all gonna be in 3in polished 409 stainless.

I begin tonight by polishing those HFC... Why ?

Why not ??? :tup:

Can't wait to build !

In for results man, sounds like a great project....

Polishing
 

Just finished polishing my first HFC... Took me 1:30h, but i'm happy with the result !

Attachment 83732

looks amazing bro

Polishing continues ...
 

Here I go again! HFC's done polishing... I received my Y pipe and cone
today with Vbands.

Here are the polished on the left, that I just did ! :tup:

Attachment 83816

The only thing I wait now, is the winter to end to bring the car at the shop ! :driving:

Want some Texas Heat? :tup: hahaha

Yes bring it to Canada plz ! :tup:

No kidding...32deg when I woke up and it'll be mid-high 70's tomorrow. Gotta luv Texas

I plan on doing a single exhaust with the BP kit. I think 3 inch will do just fine for stock block power. Im looking forward to seeing the results of this!

Stay tuned for more !

:ughdance:

Are you too far in to change to a 3.5" pipe? Going from two 2.5" pipes to a single 3" is a substantial reduction in flow. You're going to choke the car. Take a look at the first post below. The author's included a chart with all of the math.

Exhaust Tube Sizing: I did your Arithmetic for you!! - Exhaust - HybridZ

hehe.. this is why some people who need an optimized single exhaust should strongly buy my complete setup. :)

unless that somebody is of course doing a personal project :)

It would be a shame to go through all of that work to make less power than the stock cat back with hfcs.

I still think that 3in is ALOT of flow for an N/A engine.
Check the Amuse R1000 single exit, its 3in and there is
considarable gains with it.

With those HFC and custom Y pipe, this exhaust will be ALOT les
restrictive than stock.

We'll see :)

I'll consider changing to 3,5in if I go SC at 500HP for sure

Thx for the comments

09 Nismo Z exhaust project
 

3" is a lot less flow than stock. Any gains you see will be from the HFCs.

The VQ moves a lot of air. It's a big 6 that revs high. You need a lot of flow to keep from choking it up top.

You have to read this than...

http://www.the370z.com/intake-exhaus...p-exhaust.html

:tiphat:

I must have read that wrong. There's no final numbers and several people in that thread are pointing out that 3" may not be ideal. Do the math. Look at the link I posted. Look at the right hand column in that chart attached to it. Double the area of the 2.5" and then subtract the area of the 3" pipe. That's the reduction in area of the single 3". In order for your project to work as planned, you should really run a 3.5".

It's your car, but get a baseline on a dyno beforehand with the hfcs already installed. That way it'll be easy to see if you've improved things or made them worse.

Amuse R1000, 3in tubing, 15hp gain ....

It's your car. If that's enough for you to disregard the math and go with a vague post in a thread that really doesn't have any hard data in it, go for it.

the problem with the OEM exhaust is mostly the Y-Pipe which restrict a LOT since the exit of the y-pipe isnt 3'' if I remember correctly ( I will have to mesure mine after work and provide with a true mesurement)

that Amuse single in 3'' will provide more flow than the OEM Y-pipe which also give more power.. but the VHR can flow a lot more than a 3'' single.


remember that 15hp you are talking about with the Amuse R1000
its basicaly the same with the Fast Intension cat-back

We're basically talking to the wall, man.

What's this math you speak of, is that a recent discovery?

I thought all I had to do was believe everything I read on the intraweb