Jump to content
SAU Community

Bloody Exhaust!

SKYLINED

By SKYLINED,
in Engines & Forced Induction

 Share

Recommended Posts

paulr33 Grand Master

paulr33

Posted
Posted

what car/engine are you talking about? i had a friend with an rb30 vl commo and it basically vibrated a shit load when it got over about 80km/h and it was in high gear and running at about 2000rpm so he would have to run it it in power to kick the revs upto 3000 so it didnt make the noise. i believe the noise is purely ****ed exhaust. he insists on running it at 3000 (in power mode) all the time vs getting it checked/fixed

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-899067
Share on other sites
Ryno Experienced

Ryno

Posted
Posted

Get another resonator fitted to your exhaust, and it should solve the problem.

When my car was NA, I had two resonators and the rear muffler, it may sound like overkill, but the car sounded bloody smooth. When the extractors where fitted, it did sound a little "throatier", but you'd have to know the car pretty well to tell any difference.

__________________________________________________

For sale: Cobe Extractors to Suit RB25/20DE - $200

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-899800
Share on other sites
Ryno Experienced

Ryno

Posted
Posted

It's been a while since I've bought a resonator, but I'd be very surprised if it cost more than $200. As for fitting, they just cut out a section of your exhaust pipe and weld the resonator in place.

After listening to that attached flie, it sounds like a secondary vibration of some sort, and not the exhaust note. I'd have a good listen to find out where the noise is coming from, it maybe as easy as the exhaust bolts needing a tighten.

__________________________________________________

For sale: Cobe Extractors to Suit RB25/20DE - $200

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-900147
Share on other sites
pstanbis Enthusiast

pstanbis

Posted
Posted

i recently had to have my resonator changed to get a sticker off - went from 3" hotdog to 2.5", large barrel muffler (stuck in the middle of the 3" piping) and it has a simmilar sound - just over 2750 rpm, it howls so sharply and for sucjh a short time, that i too thought it was a rattle, but when held on the revs, it still makes the noise - it rally pisses me off too... not that it wasn't loud before ;) but at least it was constant... will change it all later, but thats another story (and thread)

good luck with getting rid of that noise mate, coz your right, its nasty !!

:cheers:

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-906222
Share on other sites
geordie Proficient

geordie

Posted
Posted

My exhaust history - standard exhaust had the very noise you are speaking of noise at 2800-3100rpm, but being stock was fairly quiet, then fitted rice cannon, which acted like a huge amplifier and the noise was massively loud , eventually i was pulled over and defected, went to the exhaust shop had a 2.5inch sytem fitted with the largest resonator they could fit, but keptthe cannon muffler, i now get a slightly hollow pipe noise but still sounds decent, the snappy high noise is there but much more muffled and contributes alot to the pipe noise. Personly, it scares ppl cause they think you have some crazy mods or something ???? but yeah, basicly...

Moral of the story - i think its something to do with the cams as mentioned above cause i cant get rid of it, muffle it as much as you can and live with it...sorry buddy

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-911530
Share on other sites
NA_R33 Grand Master

NA_R33

Posted
Posted

dude its called resnonance sp* all na rb25 have it as mentioned about its due to the degree of overlap in the cams, u cant get rid of it, only way i got my car to sound better was hollow cat and 2.5" straight through to a cannon, my exaust is still stting at home if u want it including a set of headers. Its very very hard to get rid of the noise without the car being loud, i tryed different exhaust shops and only fixed it when i started working at a performance shop.

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-911536
Share on other sites
SKYLINED Collaborator

SKYLINED

Posted
  • Author
Posted

Ok, found last night there was a rust hole in the joining weld between the pipe and rear muffler. The noise is really loud when the exhaust is cold, but slightly got quieter when hot.

Trying to find a s/s muffler or cat back system 2.5".

If anyone has or can get it. let me know.

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-925294
Share on other sites
White-R33 Contributor

White-R33

Posted
Posted

a while ago, i had an exhuast system on the NA motor before i swapped over... 2.5 inch system.. the resenator/muffler had a lose baffle inside... it was making the noise at certain rpm's

maybe swap the resonator.. they dont cost much at all. cheap as chips in comparison to fitting new system.

Link to comment
https://www.sau.com.au/forums/topic/44001-bloody-exhaust/#findComment-930486
Share on other sites
  • 2 weeks 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

    • JC71
      new 1.5 LSD issues/concerns

      By JC71 · Posted

      looking for some help and maybe some insight on others experience with a new LSD. R34 GT ran and drove beautifully, but always alot of grip loss due to the open R200 rear end, so I just installed a new 1.5 LSD way into the stock open R200 for a ER34. Simple. Everything seemed right. I test drove for the first time this weekend. as I started to back out the garage the first time slowly with tires straight it sounded and felt like I had a loose or half disconnected drive shaft...that was clucking around loose and shaking entire vehicle, and making it feel like the trans clutch was spontaneously slipping then grabbing very roughly while just letting out pedal slowly. I backed it out went to pull forward with the same noise, shake and slip grab feeling with hesitation, I turned the tires to back out more and then pulled ahead some same thing but worst because of added wheel resistance (which that I expected) puzzled … pulling it back in checking everything over and finding nothing wrong, I tried it the next day. same thing, couldn’t believe how it shook everything again making a terrible noise and making it feel like the trans clutch was slipping and grabbing, but I got it out of garage into the driveway, got it straight, drove forward and then reveres a few times in a straight line everything shaking , causing what felt like clutch slip and grab every time, sounded like right behind front driver tire and I could feel it in the floor board with my feet,... worst right when beginning to let clutch pedal out to engage slightly, shuttering and sounding terrible along the way…I managed to slowly get down the road, babying it the whole way, once I was rolling (out of 1st) seemed to be better and between shifts, then clutch felt closer to normal…not slip/ grab etc., but back down to any stop, straight road or turning, same thing. Made no difference if all tires were straight or if I was turning. All other gauge read out correct. with in 2 miles as planned I reached the empty parking lot and performed the break in procedure that came with lsd, essentially to drive in a figure 8 a bunch.  Did this, binding chattering, and shaking the car the whole way. I drove it back home seemed somewhat normal once I was in straight line and past 10 mph or so, and I know it will “bind” on corners and cause some tires squeal when turning especially from a stop, but when I begin to move it still causes what feels like the trans clutch to slip and jerk badly as well as shaking the entire car, and sounds terrible, that I didn’t expect. I used the fluid they supplied with LSD kit and did the breaking, planning to change fluid as they suggest after breaking, but wondering will it get smoother or less aggressive with use? maybe a 1.5 is just too aggressive for normal road driving?   I have a LSD that I put in my 71 cuda when I restored it, with amazing smooth , quite yet effective results. Different style LSD but that ones a joy to drive. maybe expecting too much from this R200?
    • Matt Z
      SAU NSW - Archies Flame Grille Meet & Cruise to Kurnell

      By Matt Z · Posted

      Join SAU NSW for a flame-grilled feed & flame-spitting cruise! Sunday 17th August 2025 3:30PM Meeting Archies Flame Grille Sylvania Waters 4:45PM Cruise Departure 5:15PM Arrival at Cape Solander Kurnell Meet Location: Archies Flame Grille Final Destination: Cape Solander Kurnell *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
    • Ozdavroz
      WTAC 2025

      By Ozdavroz · Posted

      Yeah good luck out there! Will be good to see a mighty GTST going harder than the GTRs
    • bcozican
      WTAC 2025

      By bcozican · Posted

      i will be there 😁
    • patrickxdf12
      Squeaking clutch/throw out bearing

      By patrickxdf12 · Posted

      Hello!  i just finished manual swaping my r34 skyline with a r33 rb20de box(RB71C)box  When the car is running it squeaks crazy loud and it was smoking from the gearbox area. The gearbox is fine it was tested. The clutch slave cylinder seems like it doesn't fully releases the clutch. I want to ask if this noise is from the throw out bearing or could it be the clutch assembly or disk att.xFliq87Gzw6kImKBVqDebXkj0fBqymk0JaYeP3_3SlM.mp4
×
×
  • Create New...