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Exhaust change

macca

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macca Z Hopeful

macca

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I've had my Z for about 2 weeks now and I'm really happy with it. However I can't help but want to change the exhaust on it and also add and induction kit to it. I understand the induction kit is basically used for pulling more air in as a standard factory one is slightly restricted compared to what an after market one can offer. I had one on my Civic type R and the noise it produced was fantastic, especially in the Vtec, thus making me want one even more for my Z.

 

However, I never did anything with the exhaust on my Type R and I'm a bit of a no brainer when it comes to anything mechanical where cars are concerned. I've sort of got my heart set on the Nismo exhaust kit. From what I understand through trolling through the forums and talking to people, alot of the exhaust noise is produced mainly through the backbox? I read a post on here by Zedrush who'd bought the Nismo exhaust system but had also changed the Plenum and fitted High Flow Cats. This is about where my limited knowledge ends :) I have no idea what the Plenum or the cats do. I assume both are road legal in the UK? Also is it worth fitting just the exhaust without the cats and the plenum? Is the exhaust system just a backbox or is it a full system? From the pictures in the thread it looks like a full system but I don't know if thats an extra bought on top of the backbox. Also how much would I be looking at for all the kit I've mentioned plus fitting? Wallet is still hurting from buying the car but man it was worth every penny :)

 

Thanks for any help!

 

Macca

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sinbad Z Veteran

sinbad

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Hi Macca,

 

Welcome to the forum mate! :teeth:

 

Once air goes through the filter it goes into the plenum, this distributes the air evenly into the 6 chambers (as its a v6). A plenum spacer is just that, it spaces the lower part and the upper part of the plenum further away from each other which in effect makes the plenum capable of holding more air. (Imagine filling a burger bun with an extra thick burger instead of a thin one like mcDonalds serve haha)

 

 

Because the design of the V6 there are two exhaust manifolds. (basically 3 pipes coming away from the engine at each side like this http://z-store.co.uk/index.cfm?fuseaction=product.display&product_ID=8838&ParentCat=30. Each of these then go into a catalyst. A catalyst is part of the exhaust that takes bad gases and turns them into less harmful gases for the ozone. The bad thing about this is that the cats are restrictive and slow the gas flow thus reducing performance. High flow cats do exactly what they say on the tin and are good because you dont need to swap them come MOT time. You can get cat delete pipes which are just plain pipes that replace where the cats have been, although they wont pass the MOT test so you'll need to put the standard cats back on come MOT time.

 

From each of the cats theres the y pipe, like this http://z-store.co.uk/index.cfm?fuseaction=product.display&product_ID=8742&ParentCat=30 that brings both pipes together into one pipe. this then goes into the back box which looks like this:

http://z-store.co.uk/index.cfm?fuseaction=product.display&product_ID=8828&ParentCat=30

 

 

Most cat back exhaust systems for the Zed dont come with the Y-pipe section, however you can always buy the one in the link above.

The NISMO exhaust system does come with the y-pipe. Many people chose the Nismo as its got one of the best sounds and its well built being a nissan item.

 

Air filters id' advise to get the JWT popcharger or K&N typhoon. both will sound great.

 

All the items are street legal apart from the cat delete pipes as it can fail an emissions test. and all cars from 1992 (i think) require cats.

If you look at the Z store ive linked you too theres plenty to choose from so just take your pick. Some other companies who post on here maybe able to do you a good deal too. BigPhil, Tdi and Adam@ z1 auto to name a few.

 

Oh and dont forget if you dont know,... without a tuneable ecu you wont see many, if any, power gains at all as the standard ecu compensates for the modifications. Most people add the cats, filter and exhaust purely for the sound. Plenum spacers are meant to add a small amount of power but this is debatable and still un conclusive.

 

Good luck anyway! Hope ive helped in some way.. :thumbs:

 

oh by the way what civic did you have?

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Sarnie Z Supreme Being

Sarnie

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Hi Macca,

 

Welcome to the forum mate! :teeth:

 

Once air goes through the filter it goes into the plenum, this distributes the air evenly into the 6 chambers (as its a v6). A plenum spacer is just that, it spaces the lower part and the upper part of the plenum further away from each other which in effect makes the plenum capable of holding more air. (Imagine filling a burger bun with an extra thick burger instead of a thin one like mcDonalds serve haha)

 

 

Because the design of the V6 there are two exhaust manifolds. (basically 3 pipes coming away from the engine at each side like this http://z-store.co.uk/index.cfm?fuseaction=product.display&product_ID=8838&ParentCat=30. Each of these then go into a catalyst. A catalyst is part of the exhaust that takes bad gases and turns them into less harmful gases for the ozone. The bad thing about this is that the cats are restrictive and slow the gas flow thus reducing performance. High flow cats do exactly what they say on the tin and are good because you dont need to swap them come MOT time. You can get cat delete pipes which are just plain pipes that replace where the cats have been, although they wont pass the MOT test so you'll need to put the standard cats back on come MOT time.

 

From each of the cats theres the y pipe, like this http://z-store.co.uk/index.cfm?fuseaction=product.display&product_ID=8742&ParentCat=30 that brings both pipes together into one pipe. this then goes into the back box which looks like this:

http://z-store.co.uk/index.cfm?fuseaction=product.display&product_ID=8828&ParentCat=30

 

 

Most cat back exhaust systems for the Zed dont come with the Y-pipe section, however you can always buy the one in the link above.

The NISMO exhaust system does come with the y-pipe. Many people chose the Nismo as its got one of the best sounds and its well built being a nissan item.

 

Air filters id' advise to get the JWT popcharger or K&N typhoon. both will sound great.

 

All the items are street legal apart from the cat delete pipes as it can fail an emissions test. and all cars from 1992 (i think) require cats.

If you look at the Z store ive linked you too theres plenty to choose from so just take your pick. Some other companies who post on here maybe able to do you a good deal too. BigPhil, Tdi and Adam@ z1 auto to name a few.

 

Oh and dont forget if you dont know,... without a tuneable ecu you wont see many, if any, power gains at all as the standard ecu compensates for the modifications. Most people add the cats, filter and exhaust purely for the sound. Plenum spacers are meant to add a small amount of power but this is debatable and still un conclusive.

 

Good luck anyway! Hope ive helped in some way.. :thumbs:

 

oh by the way what civic did you have?

 

Congratulations on your best post ever :thumbs:

 

 

 

 

 

 

 

 

Not hard really............. :p

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sinbad Z Veteran

sinbad

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Thanks all :teeth:

 

Macca - glad i could help. Theres no such thing as a stupid question so if you have any more then just fire away. Theres a broad spec of people on here with a wide variety of knowledge so im sure they'll be able to help in some way.

 

I got me a Integra Type R now B):teeth:

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Sarnie Z Supreme Being

Sarnie

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Sinbad could you now also explain to me what the big bang theory is, in 10,000 words or more plz . (ps thats nothing to do with sex!)

 

The Big Bang theory is an effort to explain what happened at the very beginning of our universe. Discoveries in astronomy and physics have shown beyond a reasonable doubt that our universe did in fact have a beginning. Prior to that moment there was nothing; during and after that moment there was something: our universe. The big bang theory is an effort to explain what happened during and after that moment.

 

According to the standard theory, our universe sprang into existence as "singularity" around 13.7 billion years ago. What is a "singularity" and where does it come from? Well, to be honest, we don't know for sure. Singularities are zones which defy our current understanding of physics. They are thought to exist at the core of "black holes." Black holes are areas of intense gravitational pressure. The pressure is thought to be so intense that finite matter is actually squished into infinite density (a mathematical concept which truly boggles the mind). These zones of infinite density are called "singularities." Our universe is thought to have begun as an infinitesimally small, infinitely hot, infinitely dense, something - a singularity. Where did it come from? We don't know. Why did it appear? We don't know.

 

After its initial appearance, it apparently inflated (the "Big Bang"), expanded and cooled, going from very, very small and very, very hot, to the size and temperature of our current universe. It continues to expand and cool to this day and we are inside of it: incredible creatures living on a unique planet, circling a beautiful star clustered together with several hundred billion other stars in a galaxy soaring through the cosmos, all of which is inside of an expanding universe that began as an infinitesimal singularity which appeared out of nowhere for reasons unknown. This is the Big Bang theory.

 

Big Bang Theory - Common Misconceptions

There are many misconceptions surrounding the Big Bang theory. For example, we tend to imagine a giant explosion. Experts however say that there was no explosion; there was (and continues to be) an expansion. Rather than imagining a balloon popping and releasing its contents, imagine a balloon expanding: an infinitesimally small balloon expanding to the size of our current universe.

 

Another misconception is that we tend to image the singularity as a little fireball appearing somewhere in space. According to the many experts however, space didn't exist prior to the Big Bang. Back in the late '60s and early '70s, when men first walked upon the moon, "three British astrophysicists, Steven Hawking, George Ellis, and Roger Penrose turned their attention to the Theory of Relativity and its implications regarding our notions of time. In 1968 and 1970, they published papers in which they extended Einstein's Theory of General Relativity to include measurements of time and space.1, 2 According to their calculations, time and space had a finite beginning that corresponded to the origin of matter and energy."3 The singularity didn't appear in space; rather, space began inside of the singularity. Prior to the singularity, nothing existed, not space, time, matter, or energy - nothing. So where and in what did the singularity appear if not in space? We don't know. We don't know where it came from, why it's here, or even where it is. All we really know is that we are inside of it and at one time it didn't exist and neither did we.

 

Big Bang Theory - Evidence for the Theory

What are the major evidences which support the Big Bang theory?

 

First of all, we are reasonably certain that the universe had a beginning.

Second, galaxies appear to be moving away from us at speeds proportional to their distance. This is called "Hubble's Law," named after Edwin Hubble (1889-1953) who discovered this phenomenon in 1929. This observation supports the expansion of the universe and suggests that the universe was once compacted.

Third, if the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. In 1965, Radioastronomers Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin (-454.765 degree Fahrenheit, -270.425 degree Celsius) Cosmic Microwave Background radiation (CMB) which pervades the observable universe. This is thought to be the remnant which scientists were looking for. Penzias and Wilson shared in the 1978 Nobel Prize for Physics for their discovery.

Finally, the abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins.

 

Big Bang Theory - The Only Plausible Theory?

Is the standard Big Bang theory the only model consistent with these evidences? No, it's just the most popular one. Internationally renown Astrophysicist George F. R. Ellis explains: "People need to be aware that there is a range of models that could explain the observations….For instance, I can construct you a spherically symmetrical universe with Earth at its center, and you cannot disprove it based on observations….You can only exclude it on philosophical grounds. In my view there is absolutely nothing wrong in that. What I want to bring into the open is the fact that we are using philosophical criteria in choosing our models. A lot of cosmology tries to hide that."4

 

In 2003, Physicist Robert Gentry proposed an attractive alternative to the standard theory, an alternative which also accounts for the evidences listed above.5 Dr. Gentry claims that the standard Big Bang model is founded upon a faulty paradigm (the Friedmann-lemaitre expanding-spacetime paradigm) which he claims is inconsistent with the empirical data. He chooses instead to base his model on Einstein's static-spacetime paradigm which he claims is the "genuine cosmic Rosetta." Gentry has published several papers outlining what he considers to be serious flaws in the standard Big Bang model.6 Other high-profile dissenters include Nobel laureate Dr. Hannes Alfvén, Professor Geoffrey Burbidge, Dr. Halton Arp, and the renowned British astronomer Sir Fred Hoyle, who is accredited with first coining the term "the Big Bang" during a BBC radio broadcast in 1950.

 

Big Bang Theory - What About God?

Any discussion of the Big Bang theory would be incomplete without asking the question, what about God? This is because cosmogony (the study of the origin of the universe) is an area where science and theology meet. Creation was a supernatural event. That is, it took place outside of the natural realm. This fact begs the question: is there anything else which exists outside of the natural realm? Specifically, is there a master Architect out there? We know that this universe had a beginning. Was God the "First Cause"? We won't attempt to answer that question in this short article. We just ask the question:

 

 

All my own work :D

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