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bugger... failed EPA test by 4db

GiJOr33

By GiJOr33,
in Victoria

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predator Grand Master

predator

Posted
Posted
I got cat back HKS Super Dragger, it has 1 small muffler and 1 resonator in the middle pipe. However I have to change my blitz bov to std bov before the exhaust test done, as the tester said that after market bov will not pass EPA noise test.

HKS Super Dragger II is fine.. That is the system that I've got. Mine was fine at 89db and passed, and i think it was on 10psi at the time. Full 3.5" system with a big 5" tip.. all fine, weird .. doesn't look any different to any muffler out there.

p.s. if you have a big turbo, that should even pass as long as you wind the boost right down.

GiJOr33 Experienced

GiJOr33

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yeah... boost controller was off so 0.6bar would have been the max it would have been pushing and as it spools up late in the rev range there was probably no boost there anyway. Maybe the guy at the place i went to Daalder Exhausts didn't set it up right. How far away from the exhaust is it meant to be and at what angle?

i disconnected my bov altogether...

Terminal Grand Master

Terminal

Posted
Posted

Hey guys, i'm in a similar situation, i got done at 96.5dB the other night, and slapped with a bloody fine. they've told me i need to get an inspection to clear it, but they didn't check under my hood, of which contains an aftermarket BOV and a Pod filter. does anyone know if this will also effect me getting the inspection? also, how dodgy is the steel wool in the muffler trick? i don't want to have to change the bloody muffler, i just bought the car.

GiJOr33 Experienced

GiJOr33

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I took my car to an Exhaust Place, not the actual EPA testing place. The guy that did the inspection didn't worry about the Pod filter or BOV (my bov is hidden in the front bumper). Never done the steel wool in the muffler trick. I'm gonna get a center pipe made up that's full of resonators/mufflers that i use just for when i get EPA'd (cos my new exhaust is gonna be loud). If your only gonna keep the car for a year then it's probably not worth it, but it's an option.

  • 3 weeks later...
GTRgeoff Grand Master

GTRgeoff

Posted
Posted

When i was rallying 1600's we used to have a couple of holes in the tailpipe so we could sick steel wool in and put a bit of wire behind it to stop it coming out at the wrong moment during scrutineering :) then we would drive round the corner, take out the wire and blip the throttle to spit the wool. Don't know the answer for a 3" or 3 1/2" tho

dAVE Grand Master

dAVE

Posted
Posted

GiJOr33 - changing exhaust is pretty easy. I had to do it on my gravel drive way with only the normal skyline jack.

Took about 30mins like that flat on my back.. hardest bit was lifting it up to get the hooks out.

Also, one idea I had for a temporary silencer is to unbolt your exhaust at the cat and make a metal plate that matches the shape of the flange, drill holes in it and bolt it all back up. I would say that the exhaust place would have no idea and if they looked it would just look like the gasket in there.

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