Jump to content
SAU Community

Exhaust System Lengths On R34 Gtt Sedan?

V28VX37

By V28VX37,
in Engines & Forced Induction

 Share

Recommended Posts

V28VX37 Veteran

V28VX37

Posted
Posted

Hi all, I had a quick look around but couldn't find an answer:

Does anyone have the service manual diagram or similar for R34 GTT Sedan exhaust system with the measurements (length) for all parts:

1. Dump pipe

2. Catalyser

3. Front pipe

4. Front muffler

5. Rear pipe

6. Rear muffler

Also if you have the above for the R34 GTT Coupe or R33 GTSt Coupe that would be greatly appreciated!

I am trying to work out what's involved in modifying R34 GTT Coupe or R33 GTSt Coupe exhaust system (turbo back or just catback) for R34 GTT Sedan - is it just adding extra piping before or after the front muffler, or is it more complicated than that?

The sedan systems are pretty hard to come by and pricey... I know that the system is longer than the coupe one.

I found a good pic of two systems here:

1 x Stock R33 GTST (2 door) Cat back exhaust (Cat back section with stock dual tip muffler)

1 x Stock R34 GTT (2 door) Turbo back exhaust (Dump, front, cat, cat back section, Genuine Nismo VSS Muffler)

2545913150102364341S600x600Q85.jpg

Also a useful diagram from the R34 Gtr Exhaust In R34 Gtt thread:

R34 GTT (assume coupe):

2483462340102364341S600x600Q85.jpg

Thanks in advance!

V28VX37 Veteran

V28VX37

Posted
  • Author
Posted
sedan exhaust is slightly longer so the rear hangers for the tips are at different positions.

everything else is the same.

its around 15-20cm difference.

Awesome, thanks heaps for this Dori34!

So basically all you need is a 15-20cm extension for the rear pipe (before rear muffler) to convert an R34 Coupe system for a Sedan. Sounds like a run of the mill job for an exhaust joint.

Does anyone know the differences between the R33 GTSt Coupe and R34 GTT Coupe systems?

  • 2 weeks later...
V28VX37 Veteran

V28VX37

Posted
  • Author
Posted

I just got a second hand HKS Super Drager catback (for R33 GTS-t) with the intention of getting it modified to suit my R34 GTT sedan.

I thought I'd have to add some extra piping but looking under the car it seems the other way around, I may have to cut some off!

The stock cat rear is roughly where the HKS front muffler front would be.

The cat sits basically under the passenger seat (you can just see at the bottom of the photo) and the front pipe is seriously long:

2514355650102364341S425x425Q85.jpg

Did all the R34 Sedans (this is series 1) come with this arrangement i.e. front pipe straight after dump, before the cat??

Does any manufacturer make thicker front pipes (3" or so) for these things or do you have to go custom?

dori34 Grand Master

dori34

Posted
Posted

i have a custom 3" front pipe if you are interested, $80 + post.

just needs to be flanged to suit your dump - been made custom so it sits as close to the body and doesn't sag unlike some off the shelf ones around.

From what i gathered, the R33 GTST length is same as R34 GTT but some hangers are different so have to be modded.

V28VX37 Veteran

V28VX37

Posted
  • Author
Posted
you could always just go your local exhaust shop and get them to supply and fit one?

you dont HAVE to order a japan / brand based exhaust

Yeah getting a custom one is the plan, it probably works out cheaper too.

i have a custom 3" front pipe if you are interested, $80 + post.

just needs to be flanged to suit your dump - been made custom so it sits as close to the body and doesn't sag unlike some off the shelf ones around.

From what i gathered, the R33 GTST length is same as R34 GTT but some hangers are different so have to be modded.

Thanks for the offer, I'll PM you with some further questions.

I'm going to get a quote from an exhaust shop over the next few days, let's see what they think.

  • 5 weeks later...
V28VX37 Veteran

V28VX37

Posted
  • Author
Posted

Just in case anyone is wondering, the approximate measurements of the stock exhaust system are as follows:

  1. Front pipe 50 cm
  2. Cat 39 cm
  3. Mid pipe 50 cm (looks shorter in the photo though)
  4. Mid muffler 30 cm
  5. Rear pipe 80 cm
  6. Rear muffler 50 cm (it is massive)
  7. Tips 10 cm

Please note that these are 'linear' lenghts, not actual pipe lengths.

Here's a quick photo:

2675963180102364341S600x600Q85.jpg

The catback is different between sedan and coupe and it seems that the rear end of the front pipe is mounted slightly differently, too.

  • 4 years later...

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      R34 GTR running rich and noisy turbo coincidence

      By GTSBoy · Posted

      Put a fuel pressure gauge on it. Replace the turbos. Probably completely separate issues.
    • Dose Pipe Sutututu
      R34 GTR running rich and noisy turbo coincidence

      By Dose Pipe Sutututu · Posted

      CAS maybe?
    • silviaz
      Recomended Coolant For Gt T R34

      By silviaz · Posted

      What copper washer do you guys use on the bleeder bolts? The existing one I have I had no idea where to find it in a local store, I did buy some online but that are only 1mm thick whereas my old one is 2mm+ thick and when I put the new washer out and squeeze the top radiator hose I can hear a bit of air but not with the old one. Does this matter? The new one doesn't leak, but the inner diameter is a bit loose whereas the old one threads on the bolt.
    • donut_kng
      R34 GTR running rich and noisy turbo coincidence

      By donut_kng · Posted

      Howdy all, after being out a few weeks ago on a spirited drive in my GTR I have 2 issues that oddly have appeared at the same time. Whilst accelerating quickly through the gears all of a sudden i’ve lost power at the top of third gear (below redline around 6000rpm) for no obvious reason.    From that point onwards the car has been running rich on idle, won’t really rev under load without a ton of black smoke and the odd backfire, and dying as a pull up to a set of lights unless I keep the revs up around 1500rpm. In addition when shutting down the car that same night (I was 10 minutes from home) I noticed one of the turbos was significantly noisy on wind down when shutting off the engine. After letting the car cool down overnight it starts up fine, although once it gets to temp the revs start to creep up and down, the exhaust is darker than it should be and it also sounds like it’s running rich (fat note) I’ve put a new set of plugs in it - no change, the old plugs all seemed OK with two of them being somewhat richer/fueled up than the other 3 with 1 being borderline. I’ve smoked tested the intake system via the front of the Turbos, found a split vacuum hose going to the factory boost gauge sender, which I have since replaced.  Also found another leak on the gasket coming off the rear turbo outlet, have also replaced this. After fixing both of these leaks - still have the running rich issue. I’ve also tried another pair of AFM’s - no change here After pulling off the front turbo intake pipes, there is obvious shaft play in the front turbo, which now hisses loudly on light revvs although I can’t see why this would make the car run funny even under idle. I’m curious to know why it’s running rich before I potentially replace/rebuild turbos. The car is completely stock <50,000kms  other than an exhaust. Oil and coolant are all clear. I haven’t bothered with coil packs as it looks like they won’t be the issue due to condition of the plugs. Any help appreciated as I cry myself to sleep!
    • Rezz
      R34 4 door side skirt identification

      By Rezz · Posted

      No probs at all. I used to love trying to dig up obscure info for those in need where possible going back 20+ years on SAU.  I did have another look and couldn't come up with any closer match. I'm leaning towards those skirts in your first pic are custom fitments, cut down/extended or from another car entirely and modded to fit an R34 sedan. I would've thought someone in Japan had them and taken a photo at some stage over the last 2 decades but there's nothing. Someone out there must know surely.
×
×
  • Create New...