NA Vs TT Exhaust

Discussion in 'Technical' started by DrongoMan, Jan 21, 2008.

  1. DrongoMan

    DrongoMan Sir

    Can anyone tell me the difference between and NA and TT exhaust?

    Somewhere in the back of my mind i have:

    NA = 2 1/4"
    TT = 2 1/2"

    My main question is, would i be able to buy a stock exhaust (cat back) from a TT for my NA?

    Also would the difference in size effect the performance very much?
     
    Last edited: Jan 21, 2008
  2. JEDI-77

    JEDI-77 Jedi Master

    yes

    as long as the TT exhaust bolts onto stock dump pipes, the same TT exhaust will connect directly to the NA exhaust manifold...

    I know this because in attempt to try and quiten my car down for an EPA inspection, we tried 5 different exhausts on the car, 3 of those were from TT's..:)

    Cheers
     
  3. bigbaz

    bigbaz New Member

    If the TT exhaust is bigger then it would sit lower aswel, say hello to a healthy 3cm clearance
     
  4. loud'n'proud

    loud'n'proud Challenge Accepted

    wont sit that much lower... if there is only .25" difference then it should only sit about .125" lower if the center lines are the same

    and if its custom it all depends on where they decided to weld the hooks on how high or low or how much the rubber hangers have weakended..
     
  5. ZedEx

    ZedEx Dr No

    i have a much larger exhaust than a tt exhaust and the ground clearance on it is manageable, though quite low. .25 to .125 of an inch isn't much
     
  6. DrongoMan

    DrongoMan Sir

    Thanks all, will give it a whirl.

    Bigbaz, i don't know what you're worrying about... I'll just raise the car 0.3175cm's ;) ... might even be time to raise the car to a more practical height eh.
     
  7. 300zxt

    300zxt Well-Known Member

    Are both the TT systems and NA systems press bent? If so then why bother?
     
  8. ZedEx

    ZedEx Dr No

    oh dear, not this argument again! :rolleyes: but yes i must agree, unless on a tight budget.
     
  9. 300zxt

    300zxt Well-Known Member

    Well I just meant that if the only difference is .25" in diameter or whatever, then it's hardly worth it. I guess if you got a TT exhaust for $50 then maybe! lol
     
  10. DrongoMan

    DrongoMan Sir

    Bingo. My exhaust is pretty much rusted through and wanting a cheap quick alternative
     
  11. 300zxt

    300zxt Well-Known Member

    That's cool then, just making sure it wasn't being done with the impression of adding a gazillion hp! :D
     
  12. DrongoMan

    DrongoMan Sir

    ...i was expecting to add another 50rwkw? hehe

     
  13. ZedEx

    ZedEx Dr No

    no you only get that with stickers and decals. I mean seriously! :bash: :rolleyes: lol
     
  14. LOWZX

    LOWZX Banned

    Wheres chad when you need him :) :) he has done alot of research on exhausts,maybe do a search of his last months threads
     
  15. Tektrader

    Tektrader Z32 Hoe, service me baby

    While doing 300zx lover's NA to TT conversion. The TT exhaust he supplied me to fit was rooted. Full of holes and bad welding.

    I modified his NA exhaust which by the way WAS THE SAME DIAMETER AS THE TT ONE.

    It fitted up perfectly with some cutting and welding up the front to fit it to the dumps instead of the manifolds.

    Cant see any difference TT to NA if fitted correctly.
     
  16. ZeDHeD

    ZeDHeD Well-Known Member

    Something to consider.......

    it seems during this discussion so far no one has raised the issue of 'back pressure' in a good NA exhaust system???

    I don't know the technical aspects of 'why' this is required & to what extent?? maybe someone else can enlighten us all??........BUT I do know that when I had my system fitted it was an important consideration by Mark at Exhaust Tech in Adelaide & he knows his stuff!

    I've also had other discussions with some of the 'Z gurus'.......& they too confirmed that too much 'flow' in an NA exhaust system has the potential to produce power losses not gains if adequate 'back pressure' is not maintained?? :eek:

    Something to keep in mind perhaps?? :rolleyes:
     
  17. Bolts

    Bolts New Member

    Back Pressure

    It you change the exhaust to breath better you should also tune the car because the reduction in back pressure will cause the engine to flow better and you therefor need more fuel or you may burn an exhaust valve. Some people claim that increased back pressure creates more torque at low RPM's for reasons I don't want to go into.
     
  18. Benny_C

    Benny_C About as subtle as...

    Yes correct. and....

    consider the noise factor.
    Turbo'd engines don't need as much baffling as an n/a. So if you put a tt exhaust on an n/a it will most likely be very loud. (maybe illegally loud)
     
  19. Peter Black

    Peter Black Active Member

    So if I was looking to get a higher flowing exhaust for my NA I should wait until I can also get a chipped ecu or equivalent and get a custom tune done at the same time?
     
  20. Bolts

    Bolts New Member

    Yes

    If you are gong to make modifications to the car I suggest doing them all at once and getting it tuned that way.
     

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