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Exhaust System For Twin Turbo Gtr?

Revenge

By Revenge,
in Engines & Forced Induction

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GT-R32 Grand Master

GT-R32

Posted
Posted
huh? that's wierd, if boost increased when you made an exhaust change, wouldnt this indicate more of a restriction?

that is, the backpressure can't escape quick enough, which drives the exhaust wheel faster, which drives the compressor wheel faster, which increases boost in the intake side without any change

Other way around.

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Brezza Proficient

Brezza

Posted
Posted

i've got a full exhaust on my GTR

Mines Dump Pipes

aftermarket front pipe (Stainless)

hi flow cat(stainless)

3in stainless cat back with oval muffler

the dump pipes arent needed, i only did mine cos i changed the turbos, and though "may as well"

just get a aftermarket brand front pipe, good hi flow cat and ring around a few exhaust shops and get them to do a cat back.

i didnt really worry about which brand to use, its all just metal, and just as long as its all mendrel bent youre fine.

and when it comes to sound if youre that picky, try and find a muffler that will give you the note you want, and if you need you can always chuck a hotdog in to deepen the note if need be.

good luck mate,

i'm sure youre gonna like what you get, i know i love the sound of my exhaust!

Brezza

Piggaz Grand Master

Piggaz

Posted
Posted

At the moment im running Tomei manifolds, HKS dumps, HKS front pipes 3.5 inch cat and a Kakimoto Full mega N1. Pretty damn quiet at the lights and driving.. NO drone what so ever. On boost... My god what a noise!!! I couldnt believe how much difference the cat back has made. I had some 3 inch "cut and shut" system on their before.... Just with the catback change i reckon its going better on 1.3 bar with timing pulled out of it then it was on 1.7 (2.8 stroker twin GT RS's). However it wont be cheap as previously said :P

omega36 Proficient

omega36

Posted
Posted

Hey guys, on this subject, I have a GTR with a pair of 2860's, with CES split dumps to Y-pipe to 3.5" hi-flow metal cat. Basically my old exhaust (unknown brand, 3") was reflanged to fit the cat.. What would you guys suggest I get? I'm past my "run in" stage on my new motor, so I need to get my final tune done.

Thanks for your suggestions! :D

WRRR Rising Star

WRRR

Posted
Posted
Kakimoto Regu 06+R or the Full mega N1

Paul

Man your idea of not loud must be way different to mine or some how the top part of my system must do some nasty damage. I have the Full Mega N1 (single pipe not twin) and without the additional baffle pipe in the cannon (inner silencer) it is a cop magnet - loud and on boost I agree awesome but really loud. Top part is a custom 3" bell mouths off turbs to 3.5" collector to 4" metalcat to N1.

Cheers

Piggaz Grand Master

Piggaz

Posted
Posted

^^

Well when i bought the system i was pretty worried about how loud it was going to be at idle and say sub 3500 RPM. Started the car and it just purs. Ive had a mate drive next to me and he said he can hardly hear anything. On boost it absolutely SCREAMS but without big revs adnd the gates not open its quiet as.

  • 4 weeks later...
Ten Four Grand Master

Ten Four

Posted
Posted (edited)

Hi, know nothing about exhausts. Am going to look at one tomorrow.. XForce apparently 3" to cat (xforce cat?) and 4" rest of the way + full stainless. Its at a good price so I'm pretty much sold on it unless someone can tell me different? (To suit GTR33)

Also, is it going to loud as hell?

Cheers guys.

Edited by Ten Four
bigmikespec Veteran

bigmikespec

Posted
Posted
Can someone confirm before I go and buy it please...?

4" from cat back will be pretty loud, I have a Trust Power Evolution 2 (94mm but close enough to 4") and it is pretty loud, you will get defected.

Depends if it is 4" with a few decent mufflers in there to be under the dB limit?

bigmikespec Veteran

bigmikespec

Posted
Posted
Cheers, dont have much info atm, just what i said above. I'd be going to buy it today but haven't got a ute atm... Getting it tomorrow in a hatchback :rofl2:

I would find out a bit more info before you commit and hand over cash!

Z1LLA Proficient

Z1LLA

Posted
Posted
380kw has been made on stock 33 GTR dumps with 2560 turbos.

Im changing back to standard GTR dumps because my stainless HKS split dumps are giving me creep. Also running 2560s.

Im also running a HKS Dual Racing Exhaust, its a full twin which never joins. Tuned length dual.

By changing from a single 3.7 HKS Super Dragger to this exhaust, boost shot up to 23psi from 17psi with no other changes! Let me say it must flow very well!!!

I have R33 GTR Dumps for sale if you need them, the R32 ones are crap.

P.S CES have the worst customer service in the world! dont bother with them!

Was the twin system much/any louder than the single?

I am looking at changing from single to twin system possibly.

Ten Four Grand Master

Ten Four

Posted
Posted
I would find out a bit more info before you commit and hand over cash!

It's also apparently 2 months old. I'm mainly going for it cause its only $250 and its all xforce. I had thought 3.5" was the max one should run. Will 4" be unbearably loud cause this is a daily driver...

bigmikespec Veteran

bigmikespec

Posted
Posted
I rekon twin systems are the bees knees. if you have one direct exhaust path for each turbo it will not only help flow issues but it gives you more room under the car!!!

I agree, with the first bit. But I think you will find there is less room under car, perhaps slightly more clearance to the ground which is what I think you mean.

When I get to the point of upgrading turbos twin 3" all the way to the back of the car... wooohooo!!!!

"Ten Four" for $250 you can't really go wrong, buy it, fit it, if it is too loud for your liking then f**k it off for something more suitable.

Ten Four Grand Master

Ten Four

Posted
Posted (edited)

Cheers mate, bought and collected it today (had a dent so i got it for $150 lol). It's basically a complete xforce system inc cat. Has middle muffler and rear. Question: Will the whole lot bolt up to stock front pipes or do I need to get some to suit? (Last question and very thankful cheers.)

Here's a awesome paint diagram to help explain..

edfe.jpg

Edited by Ten Four

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