Cat elimination question
Drifting
Joined: Jul 2005
Posts: 1,533
Likes: 0
From: az
Drifting
Joined: Jul 2005
Posts: 1,533
Likes: 0
From: az
Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
Pro
Joined: May 2000
Posts: 610
Likes: 1
From: Midland Texas
St. Jude Donor '09-'11
I have run them both with and without cats. If you don't mind your car smelling like a '67 big block all the time, leave the cats off. I can't stand it on a driver so I leave the cats on. I even have a catted x-pipe to use on the race car when I need to drive it for a few days during tuning/shake-downs, like after the turbo install.
I have a '67 without cats, of course. Smells up the garage after a weekend drive for hours, way too much for me.
Near as I could tell from numerous dyno runs on what is now a primarily a race car, negligible difference with cats at 350 hp, maybe 3 hp at 500 hp. Your results may be different. Doesn't matter to me, my preference is to run cats on a street car. Car is just less obnoxious to me, the owner.
Joe
I have a '67 without cats, of course. Smells up the garage after a weekend drive for hours, way too much for me.
Near as I could tell from numerous dyno runs on what is now a primarily a race car, negligible difference with cats at 350 hp, maybe 3 hp at 500 hp. Your results may be different. Doesn't matter to me, my preference is to run cats on a street car. Car is just less obnoxious to me, the owner.
Joe
