Turbo back Zorst ???

[Birty]

What exactly is needed to make the Turbo back zorst ? I've already got a cat back which does the job, but looking to upgrade with the front bits. Now I've heard the words front pipe and dump pipe thrown around, but with little understanding of what they actually are. I mean, the concept is pretty simple right, exhaust gases come out the back... But basically, if I buy, say a HKS Front Pipe, will that go from the Turbo back to the cat ? Or does it need something else ? And what's the advantage of buying the HKS pipe over a local custom job ? And also price wise ?

[Jay95R33]

The front section goes like this;

Dump pipe - this comes straight off the turbo and is about 25cm long.

Front pipe - this connects to the dump pipe and goes to your cat.

Cat - does all the greenie stuff and makes your car legal.

The key to the front pipe is the size and flow, remembering that when the gasses come out of your turbo they are very hot and have expanded a fair bit, so the bigger and free'er flowing the better.

Some dump pipes have the seperate pipe for the wastegate which should help top end power when the wastegate opens. I haven't seen back to back dyno runs to compare though.

If you do go with the front pipe go for both front and dump pipe.

I put a front and dump pipe on mine a few weeks ago and the seat of the pants difference is noticable. It seems to spool up faster and has more mid to top end power.

Ahhhh, love the mods....

J

[Silver-Arrowz]

If you have a Cat back exhaust, you may get away without having to change your old Cat. Just make sure it's big enough to fit the new front pipe.

I guess if you have one made up locally, it works out cheaper than the HKS one. However, the HKS one is pretty much guarenteed to give you good HP. Still, go the locally made as the difference may be only minor.

[DLuded]

remeber that when you are buying a brand name product your also paying for the time spent on prefecting the product, so a brand name should normally be better. But if the person making it for you knows exactly what he/shes doing then i'd go with them cause you save a lot

[TTT]

Birty..

Here are some pics to help you out...

these are off a S15 Silvia but you get the idea..

Dump pipe..

This is the very first part of the exhaust. It is bolted directly to the turbo..

Front pipe..

Connects to the end of the dump pipe and the other end to the CAT.

Back pipes..

you already know..

Here are the pics..

Dump pipe pic off the S15

[TTT]

Front pipe, cat and back pipes....

The front pipe in this pic is the part closest to the bottom of this pic..

[TTT]

Dump pipe made by APS (Air Power Systems - in Melbourne I think.. can't remember..)

[TTT]

APS whole system

Front pipe is at the very bottom right hand corner of the pic..