Jump to content
SAU Community

Custom Split Exhaust System

futurewa

By futurewa,
in Engines & Forced Induction

 Share

Recommended Posts

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Nismoid, what do you think of the centre muffler idea as opposed to your two new rear mufflers?

I have two, not both at the rear though.

One before the diff, one after it.

Whilst one middle muffler will make your set-up quieter for sure, its dependant on what you deem acceptable as to whether or not 'its enough'

Even putting in a middle muffler, it will still reverb/echo or whatever the term is and still be reasonable 'loud' as i would call it.

As lately we've been playing around with a few 'things' and the best gains are making things as quiet as possible at or near the rear muffler

rb26s13 Mentor

rb26s13

Posted
Posted (edited)

my system is simple.. twin 3inch dumps into single 4inch before cat.. 5inch body 4inch in and out metal cat and i only run one jun bl 3.5inch(couldnt find a nice 4inch muffler on the market at the time)mufflers at the back.. is a very quiet system ive found each car ive put a metal cat on its turned out to be extremely quiet

so yer.. as others asked are you running cats if so wat are they?

Edited by rb26s13
Beer Baron Grand Master

Beer Baron

Posted
Posted

that looks like williamsF1`s car (ben I thinｋ his name was?).

nice exhaust. not sure how good those mufflers are, but really the only way to quieten it is more muffler. thin wall stainless exhausts are also generally louder than an equivelant thicker wall mild steel system. but obviously one looks nice, the other doesn`t.

futurewa Contributor

futurewa

Posted
  • Author
Posted (edited)

I've had a muffler added where the crossover existed previously. (twin 2 1/2in and twin 2 1/2 out. ) It's still a bit too noisy so I guess the next step is to change the rear mufflers.

I can't be 100% sure but I think the muffler in place of the split has improved performance, especially higer in the rev range. Is it possible that the split was restrictive?

Yes, it is WilliamsF1 car, now in Perth.

Edited by futurewa

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 gtt rb25det neo timing belt kit

      By GTSBoy · Posted

      Just don't use ChatGPT or any other artificial stupidity for the equivalent of googling. Their demonstrated inability to discriminate reality from hallucination should be enough to make them totally untrusted. LLMs don't know anything and cannot think to even the smallest extent. They are just predictors of the next word, and that should never be confused with capability.
    • GTSBoy
      Another little story of weird shit happening

      By GTSBoy · Posted

      I think, given the usage model described in the OP, I'd never ever experience the wonders of the 400kW upgrade. What I really need is boost from 2000rpm and probably no more than 260-270rwkW. But I suspect that the highflow is not actually the turbo for that purpose, so I may in fact need to get a G25 or 30 or something right sized and very spooly. We shall see after it is tuned. I've had to back the boost and boost ramp off to stop the thing from pinging since the highflow went on, so I've been almost living the NA life for 9 months now! Injectors are recently in hand. AFM is in hand. Dyno is fixed. Just need to clear a queue of f**king Supras out of the way (and probably fit my new gearbox). So....some time this year? Lol.
    • GTSBoy
      braided lines for the turbos

      By GTSBoy · Posted

      For what I gather is a Sunday/summer car....braided is fine. You're not going to be left without a vehicle and you have plenty of time for inspection/maintenance. Oof. I wouldn't use them that way. They can probably handle the temperature** but the internal corrugations means that their flow characteristics are a bit shit. Lots of extra friction and pressure loss. Makes them flow like the next pipe size down. ** They are stainless, and the stainless can usually be at least something like 304L, which is pretty good at higher temperatures (unlike 316L, which I would use for a wrt/corrosive environment, but not a particularly hot environment). But the welding needs to be top notch. And even then, because you usually need at least one cone-seat end on them (because you can twist the hose and do up both ends at the same time unless one of them is a union) they can be prone to coming loose with heat cycles.
    • sunsetR33
      braided lines for the turbos

      By sunsetR33 · Posted

      I don't have the OEM oil feed lines though and the turbo-wraparound line is torn, only has water. My plan is to get replacements for these and just connect a braided line to there. And make sure it's leak free. Hoses like these are also sometimes used to connect external wastegates, so for an EGR I think you're good using them.
    • sunsetR33
      Unpeeling the Orange

      By sunsetR33 · Posted

      Alright I understand. The most likely case is probably gonna be that I just keep the OEM unit in the car as long as it works.
×
×
  • Create New...