Jump to content
SAU Community

Quiete Exhaust, Without Sacrificing Performance?

R33GTS25

By R33GTS25,
in Engines & Forced Induction

 Share

Recommended Posts

R33GTS25 Collaborator

R33GTS25

Posted
Posted

Hey all,

I was having a look at hitech mufflers which claim to have the same noise level as a stock exhaust but allow the same power output as a performance exhaust... how true is this claim? I really do not want to attract any attention to the stagea im about to purchase but i would like to mod it for more power. Which exhausts can you suggest that will out put the same noise level as the stock exhaust but also allow extra power to be made.

Also which turbo would you suggest to replace the stock one to make about 18 psi. A friend of mine said to buy a 2nd hand wrx sti turbo which could reach 18psi no problem and still spool up pretty fast... what do you think?

sewid Grand Master

sewid

Posted
Posted
I cant read jap... who is the distributor in australia for kakimoto?

Justjap is the official Australian distributor for Kakimoto. I have the O6&R Regu exhaust by Kakimoto and it is about as silent as a stock exhaust.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

92-94 is quiet enough.

Quiet to a level that it cant be heard inside the car while cruising. I can only really hear mine under full song and thats about it. Will keep me out of trouble easily, and thats 3.5"

courier33 Enthusiast

courier33

Posted
Posted

Every 3 db increse the sound volume doubles. I had epa test done with stock system from cat back (split dump and hi-flow cat) and came up to 90.4 db. Limit is 90 db in vic. So 93 db is twice as loud as stock, and 96 db is four times as loud.

I have a Jasma 3 into 3.5" system. Was tolerable with standard turbo, but fitted a gt30 0.86 and bacame a lot louder. I ended up fitting another muffler between the diff and the cannon bit at the back, which only decresed the noise level slightly.

benl1981 Grand Master

benl1981

Posted
Posted

Nice thread.

My kakimoto was ok (3.5" cat back) but I have now added a highflow and is just that bit worse. Slight drone at 2000-2500rpm if loading it up a bit.

Looking to quieten her down. It already has a centre and rear muffler.

Courier - Are you saying you have 3 mufflers on yours now?

Im thinking the SS is slightly louder than MSteel also..

mesmerized Mentor

mesmerized

Posted
Posted

hi-tech mufflers are true to their claim, very quiet without sacrificing performance, no in-cabin drone

i'm running 84db at 4800rpm, only mods are turbo back exhaust, pod filter, FMIC, standard ecu - 188rwkw on stock boost :wave:

courier33 Enthusiast

courier33

Posted
Posted

Yeah i am running three, although ive been told the center one is a resonator. The extra muffler i fitted was one of those straight through chamber mufflers which doesnt seem to have any insulation to dampen out the noise. Instead it used the shape of the inside to cancell out noise. I should have used a straight through with the insulation packing in it instead.

Ronin 09 Grand Master

Ronin 09

Posted
Posted
Hi Nismoid , when you say 3.5" who's exhaust is it and is this on the HR31 or the GTR ?

Cheers A .

His is a 3.5 behind a RB26 in the HR31

Mine is the same twin muffler 3.5 design behind RB26 in R32GTR (slgihtly different shape to fit, obviously)

there are some pics of Ash's exhaust somewhere in here...

I can get some of mine on the weekend

NRV155 Proficient

NRV155

Posted
Posted

Im also after a quiet cat back for my rb20. Ive been looking at Kakimoto but 92db is still too loud. I had a 5Zigen exhaust on my last skyline and was very quiet, however i didnt think too much about it before but i wish i had it now. I dont know what model from 5Zigen it was though. Im not even sure how many models they have.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Mine is a custom jobbie Adrian as Marus has covered :rofl:

So a one off being a HR31... everything is 'one off' for me! Especially exhausts

There are pics in the other exhaust thread (in FI section), cant remember the name but it was only a few weeks old.

sewid Grand Master

sewid

Posted
Posted
Im also after a quiet cat back for my rb20. Ive been looking at Kakimoto but 92db is still too loud. I had a 5Zigen exhaust on my last skyline and was very quiet, however i didnt think too much about it before but i wish i had it now. I dont know what model from 5Zigen it was though. Im not even sure how many models they have.

My Kakimoto is nowhere near 92db.

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

    • fatz
      Neil's R33 Gts-t Build

      By fatz · Posted

      Have a vb in honour of the car comming back
    • The Bogan
      Neil's R33 Gts-t Build

      By The Bogan · Posted

      It was a great, but typical track day, and some VB was ingested at the night time debrief 🤪
    • Duncan
      Neil's R33 Gts-t Build

      By Duncan · Posted

      And so, to round this out, I couldn't be happier to confirm @MBS206 has decided to buy the car. He drove down from sunny QLD with a trailer last week and it is off to its new home today. I'll let Matt confirm on next steps but I understand broadly that the plan is to leave it pretty much as is, and just get some quality wheel time with a nicely balanced car that is pretty much track ready. There are a few a jobs still to be done first but nothing too major and I think its a very smart buy Dinner last night at the Paragon with a round of VBs (mostly) for Neil
    • Duncan
      Neil's R33 Gts-t Build

      By Duncan · Posted

      Well, 50 pages and the end of a chapter for this car. We took it out for a shakedown at Wakie yesterday, and everything went well. There were a couple of niggles: - Oil cooler fitting leak - tightened, cleaned, stopped leaking - Radiator cap overflow fitting was leaking....Mark called it, the overflow fitting was threaded in and not tight....tightened, tested and held pressure - Small oil leak at the rear of the block, probably the turbo oil feed - too hot to get at it comfortably but probably just needs to be nipped up - leak at the driver's side rear brake line where it meets the hardline. Fitting wasn't loose, so Matt backed it off and back on, no further leaks - there's also a leak somewhere on the top of the fuel tank, maybe that cross over fuel line - that was has been left to fix when its on a hoist Otherwise than those niggles the car went great, turned great and stopped great so it was a very successful day out. I'm always really nervous when a car first hits the track after a long break, especially with a brand new engine as well but it was great. VID-20251011-WA0007.mp4  Big thanks to @The Bogan who dropped by and helped out, @MBS206 and my nephew Lachlan the apprentice.  Neil's wife Mel also surprised the hell out of all of us by dropping by; she's up in Tamworth these days but was travelling to Melbourne so had plausible deniability for turning up at the garage, it was great to see her but also obviously a bit sad all round.
    • perry_r33
      Skyline R33 Sedan Tail Lights S2 - (2 SETS Available) Silver & Grey

      By perry_r33 · Posted

      Skyline R33 Series 2 sedan tail lights in excellent condition. These are becoming harder to find, especially in this state.    BOTH SETS ARE IN FANTASTIC CONDITION (REFER TO PHOTOS)    ✅ No broken covers or cracks ✅ Lenses are in flawless condition ✅ All rear mounting lugs intact ✅ Comes complete as pictured ✅ Perfect for restoration, replacement, or upgrade   These lights are ready to go, no surprises just quality OEM parts.   These are definitely one of the better sets we have seen in a while. With minimal wear and tear they will come as you see. Bear in mind they are not brand new they are almost 30 years old now. To find them in this condition isn’t easy they can only be obtained on the second hand market.   Australia Wide Postage Available At Buyers Expense. Silver Set:$850 Grey Set:$850 PM Me for purchase or any other questions  IMG_2166.dng IMG_2165.dng IMG_2172.dng IMG_2173.dng IMG_2174.dng IMG_2179.dng IMG_2180.dng IMG_2260.dng IMG_2258.dng IMG_2259.dng IMG_2261.dng IMG_2266.dng IMG_2273.dng IMG_2274.dng IMG_2276.dng
×
×
  • Create New...