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Bloody Exhaust!

SKYLINED

By SKYLINED,
in Engines & Forced Induction

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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

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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

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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

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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:

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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

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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.

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SKYLINED Collaborator

SKYLINED

Posted
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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.

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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.

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