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| wild_cleveland |
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just fitted some advance extractors with a punched out cat to my ef now my exhaust sounds like absolute crap compared to what it used to would that be because of the hollowed out converter?
_________________ If it has wheels or a skirt, You can't afford it. |
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| PIMP_LTD |
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It could be, most likely.
My mate did it to his, and it sounds s**t as.
_________________ Commodore australia's favorite car??? What a load of s**t |
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| FordFairmont |
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Posts: 6113 Joined: 8th May 2007 |
post a sound clip
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| effalcongli |
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yeh not cats tend to sound bit..... s**t
_________________ Pacey 4499 and 2.5 exhaust single muffler |
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| BenJ |
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I noticed quite a bit if difference after I put my Pacies and high flow cat on. Took me ages to get used to it.
It doesn't sound worse or better, just different. Oh, and I lost the burble and crackle on decelaration too. BenJ
_________________ BenJ's EB T5 DOHC Ghia Wagon - Current Ride |
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| TROYMAN |
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its probably the punched out cat..
it will have a hollow echo sound ???? i did it before and it sounded weired... |
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| rushed |
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mine sounded ALOT better with extractors/highflow cat, nice and raspy like a 6 should be, i hate that heavy bass fake v8 crap that some people go for.
yeah post a sound clip so we get an idea if its an odd sound. |
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| krisisdog |
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Note will change a bit with extractors, but it'd be the cat that makes the most difference.
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| wild_cleveland |
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yeah its a really hollow sound i only used this because it is the shortened one for the extractors as mine was the full length one that goes into the exhaust manifold.
_________________ If it has wheels or a skirt, You can't afford it. |
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| Ballast |
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TROYMAN wrote: its probably the punched out cat..
it will have a hollow echo sound ???? i did it before and it sounded weired... That is the same sound that I had when I had a punched out cat. I didn't feel that I got any real gains out of it. Just buy a high flow cat. That way, you will get the performance gains, and will not be risking the massive EPA fines Just my $0.02 Chris
_________________ Remember kids, the more pages of crap in your build thread, the bigger your e-penis is |
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| wild_cleveland |
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yeah i didnt punch it out it was on a car with gas, yeah already got a letter from the epa got a resonator on it but was still over by 20 db's ended up costing way too much.
_________________ If it has wheels or a skirt, You can't afford it. |
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| ratt351 |
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got extractors,punched out cat (but with a tube welded inside so's to make straight thru) 2 1/2in with small ultra flow muffler (the loud one) 2 1/2in tail into twin 3 1/2in tips (custom) sounds bloody magic
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| fiftyone |
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its the cat, the housing really isnt designed to be hollow like it is
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| Krytox |
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wild_cleveland wrote: yeah i didnt punch it out it was on a car with gas, yeah already got a letter from the epa got a resonator on it but was still over by 20 db's ended up costing way too much.
Its not the sound db that EPA are 'mainly' concerned about, they'll be more interested in the upto- $10,000¿ fines for running a car without a cat. And No, 'I run straight gas' and 'I didn't do and thats how it was how I bought it' doesn't apply The gas could also need a basic tune to give it back its bark.
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| Johnson stroker |
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hollow cat + 6cyl = Wet f@rt noise. good quality high flow cat will be better. also loose the rear muffler and throw a hotdog in, that will sound better.
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