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
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      Nah. You need 2x taps for anything that you cannot pass the tap all the way through. And even then, there's a point in response to the above which I will come back to. The 2x taps are 1x tapered for starting, and 1x plug tap for working to the bottom of blind holes. That block's port is effectively a blind hole from the perspective of the tap. The tapered tap/tapered thread response. You don't ever leave a female hole tapered. They are supposed to be parallel, hence the wide section of a tapered tap being parallel, the existince of plug taps, etc. The male is tapered so that it will eventually get too fat for the female thread, and yes, there is some risk if the tapped length of the female hole doesn't offer enough threads, that it will not lock up very nicely. But you can always buzz off the extra length on the male thread, and the tape is very good at adding bulk to the joint.
    • Duncan
      Mistakes were made, my R34 Story

      By Duncan · Posted

      Nice....looking forward to that update
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      Neg, the top one is actually for the front. The sizes are 18x10.5 +18 and 18x11 +32.   I measured many times but I'm sure I'll have problems as this is the thread for problems.
    • Duncan
      Mistakes were made, my R34 Story

      By Duncan · Posted

      Just one thing; tapping tapered threads is tricky. Taps are always tapered and you would generally run it as far as you can, but with a tapered thread you have to stop much sooner otherwise the wide part of the taper will run in too far and you will have to thread the sensor in too far too as well (possible that it will never make a good seal) BTW nice wide wheels, I guess the top one is for the back!
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      Welp, good to know. Will have to wait awhile until steady hands with drills and taps are available. In other news, these just arrived! I will weigh them for posterity. Edit: 11kg each (or 10.9/11.1 depending on what my scale decides over multiple tests, the 18x11 don't seem to weigh noticeably any more than 10.5)  
×
×
  • Create New...