Dump & Front Pipe

[SeriesIIGTST]

Hi all,

I've read several discussion forums now about the merits of an aftermarket dump pipe and matching front pipe. There seems to be some dispute as to whether to include the separate pipe coming from the actuator and rejoining it later or just have one big pipe. I'm looking for all your opinions/experiences as this mod is one i'm planning on doing soon.

Also, did you guys get a Japanese pre-made pipe or did you get a Perth exhaust shop to make you one? If you did, where did you go and how did you find them?

Cheers for all your responses.

[gtrken]

Thats separate pipe coming from the wastegate, the actuator is the round diaphragm thing on the outside that controls the waste gate.

As most std dump pipes have a solid plate for the wastegated gas to hit and then try and turn 90 deg and mix with the rest of the gas coming out then logically, that is not good.

The one big pipe scenario is ok but still put a splitter sheild between the two outlets ( wastegate and main turbo exit gases ).

Is what is done with a lot of Rexes with good results.

The seperate pipe for the wastegate which blends in further down has got to be a better way of exiting all the spent gases and a quality local exhaust shop could do it for you at prolly a similar price to a new Jap one.

[Steve]

Had a dump and front pipe built by Exhaust Dynamics - they do mainly performace work and it is all to a very high standard, all welding is cleaned up inside the pipe as well to ensure the best flow.

The type of dump style they use is a integrated turbine and wastegate arrangement - as recommended by Per4manz (they do the custom work for Per4maz)- for stock turbos as being the 'best'.

The guys are really professional and very friendly. Showed me the pipe after they had built it, prior to fitting. Total cost for a mild steel is $350+gst ($385) or stainless is about $100 more.

Can only recommend them.

[GTS-t VSPEC]

I have a custom dump pipe with separate wastegate pipe, was made by Genie Exhaust in Myaree. I'm very happy with it, and it looks well made, don't know the cost as I had the car yard put the full exhaust system on for me.

See'ya:burnout:

[ix9]

Originally posted by GTS-t VSPEC

don't know the cost as I had the car yard put the full exhaust system on for me.

VERY Generous. Where'd you get your car from dude ?

[rev210]

The sepparate wastegate pipe design can be a problem on the stock turbo and is not proven to produce any better results.

Around $400 in 3inch stainless is what Quick fit exhausts in Morley charged me for the dump pipe to the cat. It's very well made. I wrapped mine in exhaust tape for good measure as well (DEI tape from revolution racegear costs around $100 for the 2inch wide 60ft roll).

[25GTT]

PSI performance in wangarra did mine... did i dyno befoe and after approx 20rwhp gain!!!! awesome HP gain for the cost of them....definately a must when modding your car!