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?
TECH Enthusiast
Joined: Jan 2002
Posts: 559
Likes: 0
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
Trending Topics
Joined: Nov 2001
Posts: 34,664
Likes: 2,599
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" />
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'
Brett Foote
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
On The Tree
Joined: Nov 2001
Posts: 138
Likes: 0
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
Posts: 34,664
Likes: 2,599
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.
