HKS S/S DUMP PIPE worth the $$$?

[abcent]

Im upgrading the turbo next week on my R33 and was considering whilst i had the tubro out I may as well fit a better dump pipe and front pipe (to complement my cat back zaust). I picked up a s/s Blitz front pipe from Autobarn for $329...bargan i thought, and am considering buying a HKS dump pipe second hand......

But I have heard mixed opinions on wheather there worth there money or not for there gains. I've rang around variour tuners and imports dealers.....some say there great, improving flow & throttle response. Other say they do very little and that my money would be better spent on some other aspect of the car (non specific, just saying there not worth the $350).

so I put the question to the skylines Australia Forum readers......

are they worth the $$$?

what gains have others felt when installing one?

anyone had a dyno before an after having one fitted?

[Steve]

Try dropping SLY33 a pm, he fitted one to his car, as his turbo was choking top end, he thought it was a good thing.

Ask yourself what impact turbulance in the dump pipe makes? would it increase back pressure or reduce it? Or would it make no difference? Also, does yours have the seperator block between the turbine outlet and dump? If so, what effect would that have?

Basic fact of turboed cars (in fact all cars) is that reduced back pressure will mean better flow, better flow will mean faster exhaust gasses, faster exhaust gasses will mean better cylinder scavenging and quicker spooling turbo.

I am not saying that Trust, HKS or any other brand make the perfect dump, but really, have a look at the brick wall the stock dump presents for the wastegate, it wouldnt be very hard to improve on.

And another thing with Jap second hand parts 99 chances out of 100, if you buy something second hand, its going to retain most of its value if you fit it and decide its no good.

If you have a stock turbo, IMHO the most gains you will receive are from the front pipe, but upgrade the turbo and its a different story.

[redline2003]

does the HKS dump pipe hav a split pipe running the wastegate seperately? if so how far down the dump does it rejoin before the CAT, because i was under the impression that CES made the best split dump pipe for internal wastegate turbos due to the wastegate screamer having decent travel distance before it rejoins

[abcent]

I'm not entirely sure....I was only referring to the HKS version because I haven't been able to locate any other types available? where do you get CES ones? what are they worth?

[Abo Bob]

CES racing in queensland. That's what I'm getting I think. it's something like www.cesracing.com.au

$650

[Steve]

Another one worth looking at is Arrow Diffs, if you do a search you will find them.

Just remember, if you buy a second hand brand name, it will retain its value after you fit it;)

[abcent]

The CES one is a full dump+front pipe in one, Since I alreadny bought a good front pipe it would be a bit of a waste of money to buy another one. I looks pretty good though, had i known of it sooner it would have been something to consider.

does anyone know if the HKS dump pipe has a split pipe running the wastegate seperately?

[(B1) MR_fanny]

from memory it does.....i think it runs like 15cm or something like that before rejoining the dump. i could be wrong though.

[rb20-calais]

it does split foi around 10-15cm, good design. However not as good as the CES ones.

Evan

[Blitz]

HKS Dump Pipe Craftsmanship > All.

They are beautifully made dump pipes, im my opinion you wont find better quality.

[Steve]

I agree with Blitz, they are a work of art, and they do the job (once again, ask SLY33)

[adznight]

What about the front/dump pipes that were for sale in the "for sale" section by BATMBL?

[2fardown]

I have a S/S split dump on my 200sx. It's a HKS copy that can be bought for abour $150-$250. Heaps better than a single 3" design.

[redline2003]

15cm is good, plus its a dump+front pipe in one, any idea if trust or blitz make a similar split dump design with good travel, as i prefer the jap brands but ive heard very good things about CES

[knore]

Ill be getting CES split one fairly soon, im going to get them to either take the cat off or put a way bigger one in