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Front/Dump Pipe/Exhaust Help

RB25Detonator
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RB25Detonator Contributor

RB25Detonator

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Front/Dump Pipe/Exhaust Help

Hi guys.

I want to upgrade my stock dump/front pipes and cat on my R34 GTT. I don't wanna go overboard. It's just a daily driven car. Right now I have a SR JASMA cat back exhaust. I think it's 3", but I am going to replace it with a Blitz Nur Spec cat back later on.

Firstly, I would like to replace the front/dump pipe. I saw this on just jap:
http://justjap.com/jjr-stainless-3-bellmouth-front-dump-pipe-nissan-skyline-er34.html

JJR Stainless 3" Bellmouth front/dump pipe

And this cat:

http://justjap.com/x-force-3-stainless-high-flow-cat-nissan-type-3.html

X-Force 3" Stainless High Flow Cat

Question 1: Would these two pieces bolt up together? i.e would the flanges mate up perfectly? Or would I have to modify them?

Question 2: When you put the pieces together, do you have to use some special silicon between the gaskets? or do you just use the gaskets they provide?

Question 3: Is it very important that you need a tune after the installation, or can i just adjust my boost controller down a notch and all is well?

Question 4: Would it be a good idea to wrap the front/dump pipe in Titanium wrap or waste of $$ and time?

Question 5: What is the cell rating on that x-force 3' cat and is it a good buy for a daily driver expecting a little more power gain (with supporting mods in future ofcourse)?

 

R34 GTT Coupe Manual
RB25Det, stock turbo, FMIC, stock ecu, boost controller,

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GTSBoy Grand Master

GTSBoy

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The dump is a fine basic choice.  The cat should bolt to it no problem.  Both of these parts are intended to swap in for stock pieces with other stock pieces or with other stock-swappable pieces.  Just use the gaskets.

The cat is just a ceramic substrate, so it won't be particularly excellent in the flow stakes.  Couldn't tell you how many cpi it is.  Doesn't matter, wouldn't buy it in preference to a 5" Venom metal cat with 100 or 200 cpi.

Wrapping the dump will keep the engine bay cooler, but likely shorten the life of the dump.  Your choice.

You won't need to adjust your boost controller unless you pick up noticeable extra boost.  R34s aren't good with more than ~10 psi on the stock ECU.  As for the tune question, if you are running as much as 10 psi, you will benefit from tuning it already.  But as he^ said, you can't unless you minimally put a Nistune into it.

RB25Detonator Contributor

RB25Detonator

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4 hours ago, GTSBoy said:

The cat is just a ceramic substrate, so it won't be particularly excellent in the flow stakes.  Couldn't tell you how many cpi it is.  Doesn't matter, wouldn't buy it in preference to a 5" Venom metal cat with 100 or 200 cpi.

What cat would you guys recommend? Are Venom really good ones? I saw this on their ebay store:

http://www.ebay.com.au/itm/3-Nissan-Skyline-R34-GTT-VENOM-High-Flow-Cat-/251254455756?hash=item3a7feebdcc
Can't find a 5" one but would this 3" Venom be better than x-force? 

RB25Detonator Contributor

RB25Detonator

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Posted (edited)

I'm thinking of purchasing this cat back system:

http://justjap.com/blitz-nur-spec-r-exhaust-system-nissan-skyline-er34-2-door.html

Any thoughts on this?

I heard they are awfully loud. Not really keen for angry looks or neighbours but oh wellz. What do you guys reckon? Good buy?

Edited by RB25Detonator
Jordy32 Experienced

Jordy32

Posted
Posted

I've heard they are quite loud also.

I went with the HKS silent hi power which isn't too loud or droney as it has a mid muffler, not just a resonator.

There's also the full custom system option which can be made however you like

My only advice is to steer clear of the JJR systems, I installed one for a friend on the weekend and it required an angle grinder and a welder to make it fit properly.. 

 

You get what you pay for :)

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