Cats or no cats?
Cats or no cats? Should i run cats or no cats? I have SLP headers with the random tech cats and the off-road pipes, last year the car actually ran better with cats but since then i've added LS6 intake, hotcam, TNT F1 kit and 12-bolt W/4.56's. the car is a complete bolt-on car. also been debating putting cutouts in the off-road pipes, good or bad idea?
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Joined: Jan 2002
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From: West Monore
Re: Cats or no cats? I took the cats off of my FLP Headers for better flow. Yes, I feel it is worth it. No verifiable evidence. Kent <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Re: Cats or no cats? A high flow cat that doesn't add any backpressure will help the system since it will keep the exh gases hot and help velocity.
But takeing them out always helps backpressure.
Bret
But takeing them out always helps backpressure.
Bret
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From: Schiller Park, ILL Member: #317
Re: Cats or no cats? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS1derfull:
<strong>I dont believe in losing emission legality for 10 hp or so.You can have great power and clean exhaust with good combo IMO.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That’s why you put them back on for the test, then take them off for the road. Who cares if you’re emissions legal when you’re not at the test center?
I don’t mind the smell at all. For any of us that ever owned an older muscle car that didn’t come with cats in the first place we’re used to it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<strong>I dont believe in losing emission legality for 10 hp or so.You can have great power and clean exhaust with good combo IMO.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That’s why you put them back on for the test, then take them off for the road. Who cares if you’re emissions legal when you’re not at the test center?
I don’t mind the smell at all. For any of us that ever owned an older muscle car that didn’t come with cats in the first place we’re used to it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
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On The Tree
Joined: Nov 2001
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From: Germantown, Maryland
Re: Cats or no cats? I have FLP's and recently put the cats on. The car is very quiet now. I don't know if I like it as much as the offroad pipes. With the offroad pipes people would come up to me and comment about how cool the car sounded, etc. I have had people walk up to me from 50 feet away and ask what type of cam I have. It really sounded like a race car.
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Re: Cats or no cats? Take 'em back off!! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
As long as you've got a muffler that doesn't rasp, then it sounds A LOT better without cats, IMO.
As long as you've got a muffler that doesn't rasp, then it sounds A LOT better without cats, IMO.
