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Reply With QuoteTake the dumpers off and put smaller ones on, they give the megaphone effect. Fit 2 1/4" tips temporarily, this will quieten it down.
Exhaust Noise
recently got pulled over by the boys in blue, my car was to low etc etc, anyway now i need a full roadworthy and the guy whose done it has tapped me up for my exhaust among 25 other stupid things, its not "really" that loud, twin 2 1/2 system, two mufflers and two hotdogs after the diff and 3 inch dumpers on my 5 litre....anyway he wants me to get it tested at an exhaust joint....now how do i make her a little more mundane....any ideas quick fix solutions???
cheers
Exhaust Guru
Take the dumpers off and put smaller ones on, they give the megaphone effect. Fit 2 1/4" tips temporarily, this will quieten it down.
Donating Member
If you want to make the system roadworthy and keep it roadworthy do what Not and Abba Fan Said. If you just want to make it roadworthy to pass and then want it back to normal whack a restrictor plate behind your cat for the test then remove it afterwards.
its a bit of a hit and miss attempt though hey...or should i replace the hotdogs and dumpers.....dont really want to chop and weld the exhaust and then convert it back once i get the paperwork....cause its not exessively loud....arrrrrrggghhhhhh maybe ill just buy a harley they seem to be able to have straight pipes no questions asked.....even though its frigen ear peircingOriginally Posted by Not_An_Abba_Fan
this so called restrictor plate....just an exhaust flange gasket made from metal with a whole in the centre???how big a hole would you drill into it, ive done this with a 15mm hole and the backpressure kills the motor at 35oo revs and it creates this high pitched wizzing sound lol, they will probably think its turbo.......
cheers
Donating Member
Its just a metal plate with a whole bunch of smaller holes drilled into it. As for the number of holes to drill, it is going to be a bit of trial and error and your car probably wont rev past 4000 with the plates in.
Exhaust Guru
The other option would be to find a stock system from a wreckers and bolt it on to pass roadworthy.
stock system not an option as the extractors are welded on, no flange, more hassles..one last question how far do they rev the car when testing.....any ideas just so i know before i take it in....thanks for the help fellas
Exhaust Guru
Hey, just out of curiosity what state are you in. Not too sure about the other states but i'm i Vic and when i got done for too loud i fixed the problem and after i'd had it checked at vic roads and the canary was taken off i then got a letter from the EPA saying i must have it checked at a licenced exhaust tester at my expense.
So just be carefull if you're going to fix it and change it straight back. You may have to do it all twice.
lol they the epa love people down in vic...
just go buy a bunch of steel wool shove it up the exasut if u just wanna pass a roadworthy....
lol the guy who owns one of the exasut shops here had to test my mates car and it wasnt quite up to par so he just told him to go down the supermarket buy as much steel wool as he could and cram it in and come back for another test lol...
wrecking VL COMMODORE 5 speed
FOR SALE : supra 5 speed box suite holden v8 $800
thanks for the advice fellas dunno about the steal wool wont that ignite, we used to light it up and swing it around for amusement.....mmmmmm flame thrower here we come lol...think ill just put two "bigger" mufflers in and be done with it.
cheerss
Exhaust Guru
Fit a twin in and out rear resonator, it brings both sides of the exhaust together in the rear can and will act to cancel out most of the loud note. Will deepen the note too.
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