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Best Value Dump Pipes For Gt-Rs Fitted Rb28

«Cyph3r»

By «Cyph3r»,
in Engines & Forced Induction

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«Cyph3r» Experienced

«Cyph3r»

Posted
Posted

Hi All,

I've done some quick searches but wasn't really able to get any definitive answers for what I was looking for, maybe I wasn't looking hard enough :ermm:

Anyway, a friend of mine is looking to replace some leaky mild steel dump pipes he has on his skyline. They are custom 3" mild steel dumps. These go into 3" front pipes that run into a twin 3" cat back to just before the diff where it merges into a single 4".

I believe the front pipes and cat back are CES items.

He is on a bit of a tight budget at the moment for various reasons and can't afford to go CES competition dumps and front pipe combo ( almost $1700 in mild steel!!!) which was my suggestion.

Are there any off the shelf 3" items available that anyone knows of, or does he even need 3" dumps. I was under the impression that the size at dumps and front pipes is most crucial in limiting restriction in turbine flow. (As well as placing turbulence at least 400mm away from turbine outlet.

The basic specs of the motor are as follows:

2.8L stroker kit

HKS GT-RS twin turbo kit

Stock mild steel exhaust manifolds

Oversize valves (inlet and exhaust)

Tomei cams (268deg in/ex I think with the largest lift)

The engine is making 550rwhp at present

Custom 3" dump pipes (leaky as the mild steel is corroded under heat wrap)

CES 3" twin front pipes

CES dual 3" exhaust merging to single 4" at rear.

Response is more important to him than outright power (if that has any bearing in suggestions).

Thanks in advance for any guidance!

Cheers

Jamie

Ants Grand Master

Ants

Posted
Posted

If its any help I used to run the CES racing dump pipes on my GTR and made an instant difference to power and response (+300rwkw)

I also happen to have them for sale because I purchased brand new Mines dump pipes for my new engine.

Piggaz Grand Master

Piggaz

Posted
Posted

For starters , ditch the GT RS's. There is enough trash on this setup on this forum that should change your mind.

Bell mouth dumps. Tomei Series 1's if you can find a set or a set of HPI dumps.

«Cyph3r» Experienced

«Cyph3r»

Posted
  • Author
Posted

Thanks everyone for all the help.

Ordered some HPI dumps today for him.

Tried Performance Metalcraft after reading an old thread by Sydneykid but they said they only do custom split dump/front pipes now and taking the car down to Sydney wasn't really an option.

Those HKS split pipes are tiny!

Yeah Piggaz, he would have gone different setup turbo wise but they were on it when he bought the car, then spent a fortune when he needed to replace a crank with a badly damaged keyway and it turned into a "do it once, do it right" engine build.

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