Best Dump/front Pipes For A 26 ?

[femno]

BLAH BLAH BLAH

Mate get over yourself!

Youre turning this informative thread to shit.

What Ash is trying to say is that the same turbo/engine packages that come from this one shop vary between stock and aftermarket dumps depending on how much money the customer wants to waste on shiny exhaust parts.

The curves between the various packages are always very similar from what ive seen. Thats why they recommend NOT to waste money on aftermarket dumps and manifolds and just stick with the late model stock stuff.

I used to like shiny exhaust parts but now I dont. I had problems, ive seen the light. Theres no magic behind it, just common sense.

[wolverine]

What are the Hi-Octane guys using?

(I believe they are using the factory dumps).

[NSNPWR]

Mate get over yourself!

Youre turning this informative thread to shit.

What Ash is trying to say is that the same turbo/engine packages that come from this one shop vary between stock and aftermarket dumps depending on how much money the customer wants to waste on shiny exhaust parts.

The curves between the various packages are always very similar from what ive seen. Thats why they recommend NOT to waste money on aftermarket dumps and manifolds and just stick with the late model stock stuff.

I used to like shiny exhaust parts but now I dont. I had problems, ive seen the light. Theres no magic behind it, just common sense.

'Mate', i'll post wtf I like, dont like it, dont read it...and as above in BOLD, thats not what he said at all?

Status just posted results which showed 60+nm of torque through the midrange...how is that not a worthwhile gain or justification for spending the money....

In relation to the stock stuff, you have someone posting that the fitment of 34 dumps cured their uncontrolable boost issues due to the free flowing nature of the exhaust...that clearly says that the stock dumps are restrictive...

You mention common sense, as I already said, go blow through a straw and a garden hose. Simple logic, not rocket science is it.

[R31Nismoid]

.and no, I have never read you say they could be 32 or 33 dumps

Selective memory? This one even has pretty pictures

http://www.skylinesaustralia.com/forums/Ca...ml&hl=dumps

[Angus Smart]

I guess X-force must have changed their ways...some of their import stuff was rubbish.

the exhausts for the local cars was always alright.

xforce have quality control in china where as alot of the other shit doesnt.

it was bad before but is good now

[STATUS]

70 mm primary's (one with flex pipe) with 85mm secondary to cat flange.

Got zilch here sorry ooh apart from some nice std r32 ones

actually it was 55mm primarys and 65mm secondary's my mistake.

[R31Nismoid]

I wonder if the 2" on that setup vs my 2.5" makes a difference? Theory would suggest, however sometimes that's not enough...

Hrm... Wish i had time just to play with parts all day long for interests sake

[Bunta]

On my car there was a noticeable difference with the Greddys, but once again that is in a r32, so what we can confirm so far is that the Greddy extension kit is better than r32 Stock bits.

[Bunta]

Plus how can you say no to a face like that...they so sexy ha ha

[femno]

In relation to the stock stuff, you have someone posting that the fitment of 34 dumps cured their uncontrolable boost issues due to the free flowing nature of the exhaust...that clearly says that the stock dumps are restrictive...

You mention common sense, as I already said, go blow through a straw and a garden hose. Simple logic, not rocket science is it.

Yeah simple logic but what is turbulence?...hmm i wonder...maybe a bit too complex for your simple mind.

Dumps like HKS and similar are poorly designed in that they create excessive turbulence in their 'split' design. Excess turbulence in the gate separation pipe means more backpressure in that part of the dump, which means gasses are less willing to flow out of the gate and therefore more boost. If you have an 'OK' exhaust system its not a drama. If you have a very free flowing exhaust in which gasses are more willing to flow through the turbine wheel and main pipe, rather than the required amount flowing out the gate like theyre supposed to, that creates dramas.

Thats what the problem was. So how you come to conclusion that tells you stock dumps are restrictive, even though they fixed the problem, god only knows.

And thats the reason why in most cases, upgrading to those shiny exhaust parts is an absolute waste of money. But if you want to do it go right ahead.

Sure we could all spend $1k+ on a nice Trust setup. The longest extension pipe would mean the biggest wang right?

[Bunta]

The longest extension pipe would mean the biggest wang right?

sadly i can confirm that this is not the case

[NSNPWR]

Yeah simple logic but what is turbulence?...hmm i wonder...maybe a bit too complex for your simple mind.

Dumps like HKS and similar are poorly designed in that they create excessive turbulence in their 'split' design. Excess turbulence in the gate separation pipe means more backpressure in that part of the dump, which means gasses are less willing to flow out of the gate and therefore more boost. If you have an 'OK' exhaust system its not a drama. If you have a very free flowing exhaust in which gasses are more willing to flow through the turbine wheel and main pipe, rather than the required amount flowing out the gate like theyre supposed to, that creates dramas.

Thats what the problem was. So how you come to conclusion that tells you stock dumps are restrictive, even though they fixed the problem, god only knows.

And thats the reason why in most cases, upgrading to those shiny exhaust parts is an absolute waste of money. But if you want to do it go right ahead.

Sure we could all spend $1k+ on a nice Trust setup. The longest extension pipe would mean the biggest wang right?

Simple? Sigh...You never said anything in relation to the style of dumps you had only that you had an extremely free flowing exhaust and that boost was climbing above and beyond the desired pressure...how was I to know you bought some shiny wanky split pos dump pipes cause they look hectik which are known to cause boost control issues? Explain yourself clearly in future perhaps...you could have easily said I removed my split dumps as they were causing boost issues.

Are your eyes painted on or are you just simply ignoring the results STATUS posted? More than 60nm gain in the mid range? Right where a small capacity 6 cylinder moving 1.5 tonne of car really needs all the torque it can get? How on earth is that an 'absolute waste of money' you imbecile?

Im not about to waste my money on shiny things ffs but credit where its due, the right a/m exhaust will allow you to make more power and torque than its factory equivalent...Its your choice if you wanna do sh1t on a budget and you clearly feel the need to justify that choice? Regardless, the results are back one page for all to see.

[R31Nismoid]

^ did you also see the correction in the exhaust diameters?

Which now then makes the front pipes signifigantly smaller than what I'm using and the other cars.... 2.5" vs 2".

So it was dumps AND front pipe alterations at the same time. Good of Trent to go and meausre to be sure - adds once again to the discussion.

Could it be a contributing factor? Yes...

Will we ever know what specific impact that could have had? No...

So back to square one in some respects.

BTW - Don't abuse people. It's not nice. Passionate discussion is one thing... insults are another.

[MrStabby]

Dumps like HKS and similar are poorly designed in that they create excessive turbulence in their 'split' design.

I would say the design is clever. The split design is there to reduce the turbulence that occurs after the gate and turbine, however the effect will only be considerable when the gate is shut. So when compared to an open dump, you would expect spool to be better. The dyno sheets posted show improved spool, but as stated the change of front pipe ID means the test is unreliable.

The problem with splits is that they are much more sensitive to sizing, whereas with opens pretty much anything will be fine.

[thrtytwo]

Lots of people think that. But unless the split dumps are re introduced at a ver shallow angle they create MORE turbulence. You see some that re enter at almost 90 degrees. That doesn't equate to smooth flow haha

the reasonxsplit dumps CAN be beneficial is they give wastegate gas extra pipe, diameter, to flow through. Compared to a bellmouth which squashes all the gas down to a smaller diameter. Which increase pressure, therefore decreasing flow at the bottleneck.

But if the whole dump. Including bellmouth. Is a lot larger than factory you probably won't have that problem.

Split is better if it's properly made. The important thing is the angle split comes back into the main exhaust pipe. Also if you have a joine split/dump lik on single turbo skylines the split can be longer which also allows smoother re-entry

[omega36]

C.E.S here in Brisbane make a setup like the greddy setup, in stainless and mild steel, 3 inch or 3.5 inch, I run the 3.5 inch setup on my race car, I got them ceramic coated and they are surprisingly light for the size.

I also use these front/dump pipes. Pretty awesome

[Bunta]

Lots of people think that. But unless the split dumps are re introduced at a ver shallow angle they create MORE turbulence. You see some that re enter at almost 90 degrees. That doesn't equate to smooth flow haha

the reasonxsplit dumps CAN be beneficial is they give wastegate gas extra pipe, diameter, to flow through. Compared to a bellmouth which squashes all the gas down to a smaller diameter. Which increase pressure, therefore decreasing flow at the bottleneck.

But if the whole dump. Including bellmouth. Is a lot larger than factory you probably won't have that problem.

Split is better if it's properly made. The important thing is the angle split comes back into the main exhaust pipe. Also if you have a joine split/dump lik on single turbo skylines the split can be longer which also allows smoother re-entry

Thats why the greddy and ces ones are good, they are literally 4 times longer than the typical ebay type ones and come in at a decently shallow angle

[bodge]

My car is using standard dump pipes, not sure if they are R32 or R33 items with -5 turbos and it is making a "claimed" 380RWKW, which l believe from drivng the car and being in cars that have around 330 to 350RWKW there is no way it has that claimed power reading. There are many other factors on my car that make this power claim seem untrue and having standard dump pipes do not help. Looking at the standard dumps compared to aftermarket ones, there has to be some gain had from changing them over.

[STATUS]

^ did you also see the correction in the exhaust diameters?

Which now then makes the front pipes signifigantly smaller than what I'm using and the other cars.... 2.5" vs 2".

So it was dumps AND front pipe alterations at the same time. Good of Trent to go and meausre to be sure - adds once again to the discussion.

Yeah the front pipes were NISMO not hks like i first thought.

[R31Nismoid]

Interesting Nismo items are only 2" though, not much bigger than factory!