Jump to content
SAU Community

Recommended Posts

Hi ppls

In your experience, would there be a lot of diference between the following (Assume the Cat is a Batmbl big one and the Exhaust is a Fujitsubo Power Getter):

Standard Dump Pipe with Blitz front pipe.

Split Dump Pipe and Blitz Front Pipe.

Batmbl combined Dump and Front.

CESRacing full split Dump and Fron combo with wastegate gases joining rest of exhaust about 4-500 mm down the line.

I'm torn you see.

I have the Standard Dump with Blitz Front, and I'm wondering if its worth the money to upgrade the combination...

All help appreciated.

Link to comment
https://www.sau.com.au/forums/topic/45114-dump-and-front-pipe-combinations/
Share on other sites

Guest Robo's

In your situation i would be definately upgrading to a split dump and joining to your Blitz front. Your exhaust can only flow as good as your first restriction and i believe it would be in your stock dump. Even the BATMBL front pipe is bigger than the stock front.

I have the BATMBL dump. but if i could get my hands on a split dump i would love to try it as when the wastegate opens there would have to be some turbelance with the exhaust turbine which doesnt help flow.

Bastard.

I want one.

Wanna do a comparison thing for us....

A dyno run before fitting anything, a dyno run with the cat back, and a dyno run with all the bits.

I'll pay for one run as a service to SAU..........

Or maybe a nice workshop is reading this and would help us out by not charging us four runs............

Anyone?

This is interesting, and I am all for a free flowing exhaust... BUT my GTR with the HKS GT2530's and everything that goes with, makes the same as others with the same mods. However I don't have aftermarket dumps and I'm still using the stock cat, the rest of my exhaust is aftermarket. Yep! I'm still using the standard "big time restrictive dumps"... :confused: well so am I.

There's the argument that:

- split dumps are better because they split the gases

- then you have HKS split which are only 150mm long "similiar to CES splits", but this is apparantly not effecient, and some will say you need the TRUST combined front pipe & split dump where the split meets around 400mm down rather than 150mm like the HKS.

- then you have companies like mines who have a dump with no split just a big muther opening..

- then you my tuners tell me save your dosh because the gain on dumps is very minimal, based on dyno testing.

still :confused: ..hmm so am I ! Didn't mean to throw this at ya. :)

Yeah I'm up in the air about it too.

Looking at the R34 cast dump, it can only be restrictive!

But Hypertech told me that there is very little difference also. Maybe 4 or 5 at the top end.

But surely, response would be better?

I'd really like to see the Boost Curve with diffent combos on......

I'd say on the stock boost you would find little gain with the stock dump, but the response would likely change. At higher boost there is a definite change with the BATMBL style in the midrange and the exhaust note..

I'd sell the expensive engine pipe and probably pay less for the combined dump pipe and come out ahead. They are easy as hell to fit but make sure you use anti-sieze paste on the threads.

In reality, when you look at the turbine outlet and the wastegate outlet diameters I see little need to go split on the standard turbo. There is a definite flow impedance designed into the stock dumps however.

Later down the road I will probably be putting a to4 on and at the moment just have a cat back on a 33gtst. I am in the same sorta boat as bass junky Most cost effective is dump and front in 1 (non split) ie. batmbl or flyn and is CES wank factor for the price (How much did you get urs for Daz) ? I can get a 3inch front pipe cheap but split dumps r still expensive. What do u guys reckon i should go with? Maybe getting a local exhaust shop to have a look and give me a quote on making a split one up. Dandenong exhausts made a nice one for a friends rex.

sorry to hijack thread :(

Hi ppls

In your experience, would there be a lot of diference between the following (Assume the Cat is a Batmbl big one and the Exhaust is a Fujitsubo Power Getter):

Standard Dump Pipe with Blitz front pipe.

Split Dump Pipe and Blitz Front Pipe.

Batmbl combined Dump and Front.

CESRacing full split Dump and Fron combo with wastegate gases joining rest of exhaust about 4-500 mm down the line.

I'm torn you see.

I have the Standard Dump with Blitz Front, and I'm wondering if its worth the money to upgrade the combination...

All help appreciated.

What about a HKS dump pipe?

Crazo

That's what I'm talking about.

they sell for over $500 new.

At that price, would be better to sell my front and buy the CES racing one.

Decisions...

Enrico... Ultimate Performance Imports have an R33 HKS Split Dump pipe on their page for $350.

Wont fit an R34, but will fit yours.......

Sorry of rthe hijack but I've got a custom stainless split dump pipe for sale if anyone's interested. Was only used for a few months before an engine rebuilt and other mods made me change. Asking $250 but open to offers.

Pm me for pics and details.

I'm not fully sure of where it was made because i bought it off INASNT when i bought his turbo at the end of last year. The thread for the dump is still here but the dump is not as shiney now due to use, still the same part tho in good condition tho.

http://www.skylinesaustralia.com/forums/sh...light=dump+pipe

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hi all. Been a while but things are moving along. I just have something that I am wondering about. Since I will use OEM turbo oil pumbing, I got myself a new bolt, the one that goes into the engine block oil feed. As I recall (and see visually) this bolt comes restricted with I think a 1.7mm hole? Not quite sure but it was something around that size. The turbos have 1mm restrictor bolts installed, as necessary due to ball bearings and my higher oil pressures. Can I now just use that OEM bolt with the 1.7mm hole in for the engine block or will this actually be too much oil flow restriction and I have to drill it out first? In my head it would make sense for the bolt to be at least 2mm wide as both turbos take "1mm of oil flow". Do let me know if my logic is flawed here, I just want to make sure I don't kill my turbo bearings with too little oil. Don't know if I can trust the saying I read somewhere that ball bearing turbos essentially only need an oil mist
    • There are several aftermarket options available, from not-too-painful moneyhttps://justjap.com/collections/driveshafts-bearings/products/d-max-reinforced-replacement-rear-driveshaft-set-fits-nissan-s13-s14-s15-r32-r33-r34-c35 and  https://justjap.com/products/crank-motorsport-billet-rear-axles-fits-nissan-skyline-r33-gts-t-r34-gt-t?srsltid=AfmBOorQk4xkGUa98kO7v2ePLUiNt-HRrM2AwWNw9mbSIVE1ujBVwY__, all the way up to The Driveshaft Shop https://driveshaftshop.com/skyline-cv-axles/
    • Yeah based on old XRC5964S specs, it looks to be roughly GTX3576R sized? But this 5964S compressor will flow 90lb airflow somewhat similar to the compressors in both the GTX3584RS or G35-1050.. I fully expected the 0.64 rear A/R to choke up top - seems way too small from typical convention - but these are seemingly beneficial over the prior 0.82 results.. Be interesting to see if he comments on the EFR question in that thread - he mentioned in a prior video that BW EFR's were the "cats pajamas 10 years ago", but by the sounds of things all his kits have been using Xona for quite a while now.
    • Yeah it’s still got the oem manual gearbox and clutch, only kinda mods are a blow off valve, coil overs, and a aftermarket intercooler. Also had it for about 2 months now with a lovely midnight purple paint on it.
    • Yeeeppp, been following a lot of the testing on the latest Xona stuff and there are some mental results.  He also went over 1000hp @ 4 hubs on his Mainline with a XRE6364S (63mm) which was also well into the 20psi range before 4000rpm on a 2.5. Crazy stuff. Fwiw the XRE5964S is basically the modern equivalent of their old HTA3582 - would drive nicely enough on an RB25 or 26, but proven capable of a huge amount of power if you want to spicy with rpm tho even at sane boost levels will make stout numbers 
×
×
  • Create New...