Nissan 370Z Forum

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-   -   Forced induction and OEM exhaust (http://www.the370z.com/forced-induction/52942-forced-induction-oem-exhaust.html)

Boosted Performance 04-11-2012 09:47 PM

Forced induction and OEM exhaust
 
Soooo, as I am sure many of you have seen the single turbo build I am working on here. If not:

http://www.the370z.com/forced-induct...rbo-build.html

Today I had a closer look at the OEM exhaust system, and can't see anybody using this in conjunction with any forced induction system. Since my customer has the F.I exhaust system, and it seem a lot of people on this forum have it as well, I was thinking that I should not even bother with a down pipe that would bolt up to the OEM Y-pipe.

How many aftermarket exhaust systems are out there for the 370z that do use an aftermarket exhaust system that would bolt up to the OEM (or aftermarket) Y-pipe?

I see that Tanable makes one:

http://www.octanemotorsports.com/images/T70150.jpg

DC sport:

http://www.racingsolution.com/images...nister2Tip.gif


and Litespeed:

http://www.maperformance.com/product...0z_catback.jpg


How popular are these exhaust here? These would bolt up to the OEM Y-pipe so I would have to build a separate down pipe for an exhaust like this.

Feedback is greatly appreciated.

Ron 04-11-2012 10:08 PM

I don't think they are very popular. Most people here have FI, HKS, Invidia, Ark or Greddy

blackonorange 04-11-2012 10:13 PM

... I'd say your pretty safe in ruling these out ...

sfearl1 04-11-2012 10:17 PM

The exhausts listed aren't very popular. What about Motordyne?


Boosted Performance 04-11-2012 10:51 PM

Thanks for the feedback so far. It looks like Motordyne uses their own V-band setup, and it would most definitely not bolt up to the OEM Y-pipe.

jay4500 04-12-2012 12:15 AM

jay
 
why would you want to keep the oem y pipe thats the most restrictive part of the exhaust.:icon14:

Cell 04-12-2012 12:25 AM

GT haus uses the stock Y pipe. Unfortunately it is over priced.

Boosted Performance 04-12-2012 12:28 AM

Quote:

Originally Posted by jay4500 (Post 1656458)
why would you want to keep the oem y pipe thats the most restrictive part of the exhaust.:icon14:

.


Quote:

Originally Posted by Boosted Performance (Post 1656115)

How many aftermarket exhaust systems are out there for the 370z that do use an aftermarket exhaust system that would bolt up to the OEM (or aftermarket) Y-pipe?


Cell 04-12-2012 12:30 AM

From what I have seen, many of the high-end exhaust uses the stock Y-pipe design. This could be the reason why most people stay away from them because they go for 3000+++.

Boosted Performance 04-12-2012 01:04 AM

So it is safe to say that true duals are most commont then?

Cell 04-12-2012 01:27 AM

Quote:

Originally Posted by Boosted Performance (Post 1656523)
So it is safe to say that true duals are most commont then?

Yes.

SS_Firehawk 04-12-2012 01:32 AM

I use the Motordyne XYZ Y pipe in conjunction with the Tanabe exhaust. I like this combo a lot and the fitment is perfect. PM me if you need to know any details

sfearl1 04-12-2012 12:13 PM

Quote:

Originally Posted by Boosted Performance (Post 1656313)
Thanks for the feedback so far. It looks like Motordyne uses their own V-band setup, and it would most definitely not bolt up to the OEM Y-pipe.

that's a bummer. i was planning on getting this exhaust soon. and i was planning on getting your kit.

memorylasts 04-12-2012 12:23 PM

This is the berk exhaust...

http://www.berktechnology.com/conten...ts/31/main.jpg

Boosted Performance 04-12-2012 12:26 PM

Quote:

Originally Posted by sfearl1 (Post 1657555)
that's a bummer. i was planning on getting this exhaust soon. and i was planning on getting your kit.

Well, it will be a two piece down pipe. One will bolt up to the turbo (obviously), and the other will be made to bolt up to the F.I exhaust. I could send out the kit with only the first section that bolts up to the turbo, and any competent exhaust shop can fabricate the short 20" transition piece from a single 3" pipe to whatever exhaust you happen to have.

Just a thought.

With the Berk exhaust posted above, I would cut (prependicular to flow) the X section of the pipe right in the middle, flatten a 3" piece of tubing in to an oval and weld it to the X section. that is very easy and I have done it before.

Ha, look at that I even have a picutre of it:

http://i137.photobucket.com/albums/q...k/IMG_6254.jpg

sfearl1 04-12-2012 12:30 PM

another thought, i could purchase the MD exhaust and have it shipped directly to you.

edit: perhaps ship just the mid-pipe to you?

Boosted Performance 04-12-2012 12:31 PM

Quote:

Originally Posted by sfearl1 (Post 1657607)
another thought, i could purchase the MD exhaust and have it shipped directly to you.

If I had a 370z at my disposal I would have no problem doing that.

sfearl1 04-12-2012 12:33 PM

Quote:

Originally Posted by Boosted Performance (Post 1657612)
If I had a 370z at my disposal I would have no problem doing that.

you do right now! :tup:

i ninja-edited my original post. would you need the whole exhaust or just the mid-pipe?

Boosted Performance 04-12-2012 12:43 PM

Quote:

Originally Posted by sfearl1 (Post 1657616)
you do right now! :tup:

i ninja-edited my original post. would you need the whole exhaust or just the mid-pipe?

Yeah, but as soon as this project is done it is gone. If I had some extra time for it it would be no big deal. Mid pipe would work as long as it uses the OEM hangers before the rear axle. This would determine the length of the down pipe.

Remember, I need to build two kits here, one for the car to drive away with and one for me to keep so I can build jigs in order to duplicate the entire kit so that it is a perfect fitting kit every time

memorylasts 04-12-2012 12:43 PM

Quote:

Originally Posted by Boosted Performance (Post 1657590)
With the Berk exhaust posted above, I would cut (prependicular to flow) the X section of the pipe right in the middle, flatten a 3" piece of tubing in to an oval and weld it to the X section. that is very easy and I have done it before.

Ha, look at that I even have a picutre of it:

http://i137.photobucket.com/albums/q...k/IMG_6254.jpg


Awesome! thank you! I was planning on going to a custom route... maybe not anymore... lol!

Cell 04-12-2012 12:52 PM

Why not design an all around kit that will fit the OEM exhaust setup. Then design your own exhaust on top of it? Or give buyers to buy the mid-pipe + short tail from a different source.

I think AAM designs a short tail and a few other companies make the mid pipes.

Boosted Performance 04-12-2012 12:59 PM

Quote:

Originally Posted by Cell (Post 1657693)
Why not design an all around kit that will fit the OEM exhaust setup. Then design your own exhaust on top of it? Or give buyers to buy the mid-pipe + short tail from a different source.

I think AAM designs a short tail and a few other companies make the mid pipes.

One size does not fit all. So for every exhaust system I would have to build a different mid-pope...just not goin to happen.

I will stick with the F.I down pipe, and will make the one to bolt up to the OEM exhaust...it won't hurt to have around just in case.

erkthejerk73 04-12-2012 01:44 PM

Quote:

Originally Posted by Boosted Performance (Post 1657655)
Yeah, but as soon as this project is done it is gone. If I had some extra time for it it would be no big deal. Mid pipe would work as long as it uses the OEM hangers before the rear axle. This would determine the length of the down pipe.

Remember, I need to build three kits here, one for the car to drive away with and one for me to keep so I can build jigs in order to duplicate the entire kit so that it is a perfect fitting kit every time, and erks kit

fix for you absent minded post! :p

sfearl1 04-12-2012 02:36 PM

Quote:

Originally Posted by Boosted Performance (Post 1657718)
One size does not fit all. So for every exhaust system I would have to build a different mid-pope...just not goin to happen.

I will stick with the F.I down pipe, and will make the one to bolt up to the OEM exhaust...it won't hurt to have around just in case.

was this an issue for the Z33 kit?

sfearl1 04-13-2012 08:10 PM

Sasha, I'm curious what your recommendation for the exhaust would be, had you not been given a car w/ a FI exhaust already installed. i'm guessing you're running something custom on your 350. would you be willing to include an exhaust option for those who want a complete turn-key kit?

Cell 04-14-2012 12:27 PM

Quote:

Originally Posted by sfearl1 (Post 1661866)
Sasha, I'm curious what your recommendation for the exhaust would be, had you not been given a car w/ a FI exhaust already installed. i'm guessing you're running something custom on your 350. would you be willing to include an exhaust option for those who want a complete turn-key kit?

http://www.the370z.com/intake-exhaus...st-review.html

That is probably one of the cheapest options that I can find. I may even just try that exhaust out and see how it works with the kit.

Boosted Performance 04-14-2012 12:44 PM

Quote:

Originally Posted by Cell (Post 1662731)
http://www.the370z.com/intake-exhaus...st-review.html

That is probably one of the cheapest options that I can find. I may even just try that exhaust out and see how it works with the kit.

If that exhaust bolts up to the OEM Y-pipe, it would work well. If it comes with it's own Y-pipe then the flange may be in a different location compared to OEM.

Cell 04-14-2012 12:50 PM

Quote:

Originally Posted by Boosted Performance (Post 1662763)
If that exhaust bolts up to the OEM Y-pipe, it would work well. If it comes with it's own Y-pipe then the flange may be in a different location compared to OEM.

From what I understand, it does not come with a Y-pipe. You can buy the Y-pipe from them though if you want. Basically that exhaust comes with no Y-pipe.

http://www.ebay.com/sch/i.html?_from...370z+top+speed

Boosted Performance 04-14-2012 12:59 PM

Quote:

Originally Posted by Cell (Post 1662773)
From what I understand, it does not come with a Y-pipe. You can buy the Y-pipe from them though if you want. Basically that exhaust comes with no Y-pipe.

370z top speed | eBay

Looks like it..but 2.75" does not excite me. Why didn't they go to 3"? The 2.75" will be enough to max out the stock rods, but still.

sfearl1 04-15-2012 11:03 AM

Sasha, what don't you like about the OEM exhaust? Is it the muffler design? If so, would these work? They are an axle-back replacement for the stock muffler...

AAM Short Tail

http://farm6.static.flickr.com/5169/...292734a8ba.jpg

Boosted Performance 04-15-2012 11:05 AM

Quote:

Originally Posted by sfearl1 (Post 1664257)
Sasha, what don't you like about the OEM exhaust? Is it the muffler design? If so, would these work? They are an axle-back replacement for the stock muffler...

AAM Short Tail

http://farm6.static.flickr.com/5169/...292734a8ba.jpg

That would be a great option. It is the OEM rear muffler that concerns me, but this would work just perfect.

sfearl1 04-15-2012 11:07 AM

Quote:

Originally Posted by Boosted Performance (Post 1664266)
That would be a great option. It is the OEM rear muffler that concerns me, but this would work just perfect.

If we go that route, does the diameter of the stock mid-pipes (and short-tails) concern you?

Boosted Performance 04-15-2012 11:38 AM

Quote:

Originally Posted by sfearl1 (Post 1664269)
If we go that route, does the diameter of the stock mid-pipes (and short-tails) concern you?

The stock mid pipe is dual 2" exhaust, that makes for a total surface area of about 6.3" squared. That is about the same as having a 2.8" single pipe exhaust. Since it is a straight shot to the back, I would say that it is fine for the power a stock block can handle.

Of course a dual 2.5" would be better, but the OEM mid pipe with the muffler delete pipes should work fine.

ANMVQ 04-17-2012 01:51 PM

I'm FI and running Exoticspeed exhaust, they make two options one for Turbo and one for NA. I stayed with the NA set up because I went SC and not Turbo. But they do make a turbo application along with HFC's or TP's, Check them out. VERY VERY good stuff. Sound is amazing, Every where I go people are asking me what system I have.

G37X base line pull with Stillen SC kit. 2nd run - YouTube


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