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1 piece Dump front pipe, to buy or not?

r32mspec

By r32mspec,
in Engines & Forced Induction

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r32mspec Contributor

r32mspec

Posted
Posted

Just wondering what you more experienced guys think of these 1 piece dump front pipes, it will be on a 32 with a soon to be fitted vg30 turbo. The pipe is the same price as a screamer style dump plus you get the rest of the piping down to the cat. Does the seperate pipe and seperater on the screamer style give you any significant gains over this style. Please give me your advise. Also, I have found an old AFC unit with ony one adjustment over the enyire rev range aprox 12% + or - for my turbo upgrade will this allow my stock ecu to handle the bigger flow of the vg30 or do I need to have my ecu remapped or do I need the newer Safc, I appreciate all your advice thankyou.

Steve Grand Master

Steve

Posted
Posted

r32mspec, I have been told by an exhaust design specialist, that with the stock turbos, having a seperate wastegate pipe has no advantage over integrated. Its only when you start getting into larger aftermarked turbos it does help.

I had a combined pipe made up, that incorporated the front pipe, and am very happy with the results - and at half the cost of using a seperate wastegate pipe, I'm happy.

It cant be working too bad, becuase I dont have much spare in the way of injectors, and am at the limits of the stock turbo. Also, it is really, really hard to drive without coming on boost.

r32mspec Contributor

r32mspec

Posted
  • Author
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Thanks for advise, think i'll go that way, if any one else is interested the Pictured pipe is from Flying Motorsport International www.flyn.com.au $300 it is a sydney number but when i conacted them he said at this stage they are a mail order only setup, Bumer i always like to have a good look a goodies before i buy them.

Jay95R33 Grand Master

Jay95R33

Posted
Posted
Originally posted by rev210

the sepparate dump pipe does not help. It can be a hinderance on a stock turbo. The units form the Jap tuning houses do not have them for a good reason.

Let the people who disagree with me beat my 1/4 time. (jokes)

I'm with Rev on this one.

The stock turbo wastgate is the problem with the turbo (among other things). Using a seperate one might give you a bit more up top, but for the price it isn't worth it.

I got a one piece, got it for $280, and it works fine.

The only thing I want to do with it is wrap it in thermo wrap stuff.

J

  • 2 weeks later...
Haxorz Rising Star

Haxorz

Posted
Posted

Also, any ideas on what sort of boost level rise I can expect from adding the front/dump?

I haven't touched the boost and am running 6.5/8.5psi with a 3.5" cat back and pod.

Question is cause I'm looking at putting in a dual bleed valve setup (aka Zahos) and don't want to go over 10psi if I can help it.

Ronin 09 Grand Master

Ronin 09

Posted
Posted

i have a Trust cat back + front pipe and the peak boost is about 9.8psi; but when the boost kicks up at 4K it is pretty much always more than 9psi. I've just had a seperate wastegate dump fitted (today) and want to get on the dyno again to see what (if any) difference it made.

Sydneykid Grand Master

Sydneykid

Posted
Posted

Hi Guys, so let me get this right, on a standard turbo that produces say 300 bhp (an RB25DET standard turbo) a separated wastegate pipe and turbine outlet pipe is not worth it. But on an after market turbo that produces, say 350 bhp (HKS 2530) a separated wastegate pipe and turbine outlet pipe is worth it.

Seems illogical to me.

I am having trouble believing that there is absolutely no interference whatsoever to the flow of exhaust from the turbine when the wastegate (even if it is a smaller one) opens. There must be some interference, it is simply a question of how much.

So it gets down to a matter of value for money, is the extra power gained worth the cost of separate pipes or not?

Experience would tell me that most people who go to the trouble of upgrading their dump in a Skyline, will sometime in the future (often forced by ceramic turbine failure) at least hi flow their standard turbo. Then a split dump for them is definitely a worthwhile investment.

Hope that adds to the thought processes.

BATMBL Proficient

BATMBL

Posted
Posted

hey guys,

If any1 wants to buy a front+dump pipe (one piece, like the picture above), let me know, because i can supply you with a mild steel 3 inch front+dump pipe for $260 for r32 & r33 skyline.

If you want a stainless steel one, its $360.

If someone want one for a 180sx or other let me know and i can quote you a price, i just have to call the guys that make it(CATCO).

They also do 3 inch hi-flow cats (with flanges). If interested, I can buy you one for $160.

I can ship interstate for a little extra.

cheers

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by BATMBL

hey guys,

If any1 wants to buy a front+dump pipe (one piece, like the picture above), let me know, because i can supply you with a mild steel 3 inch front+dump pipe for $260 for r32 & r33 skyline.  

If you want a stainless steel one, its $360.  

If someone want one for a 180sx or other let me know and i can quote you a price, i just have to call the guys that make it(CATCO).  

They also do 3 inch hi-flow cats (with flanges). If interested, I can buy you one for $160.

I can ship interstate for a little extra.

cheers

thats way 2 pricey for mild steel, u can get stainles for $240.

Pops Apprentice

Pops

Posted
Posted

I'm also interested in getting a 1 piece dump/front pipe ansd a 3" maybe 3.5" cat to finish off my exhaust . If you guys who know where to get these could you post links/details .

Everyone likes to save a bit of cash but does it sacrifice a bit of quality in the process ?

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by BATMBL

$240 for a stainless 3inch pipe, yeh right...

the trade prices for those pipes are higher than that.

you see people buying pipes for 400 etc, thats just too low for a decent stainless steel pipe me thinks..

my2c

i got this for $280

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