I tried this about 15-20 years ago with my '79 Chevette. My problem was that it only got 20mpg (maybe up to 22) no matter how I drove. Easy on the gas, romping on it, city, freeway, didn't matter. I poked at that car for almost 200k miles trying to figure out what the problem was. One of the things I did was remove the cat...actually ran straight piped that tank. Only result was a headache from the noise and a stern look from a deputy sheriff.
The cat's there for a reason...as a kid I grew up in Smoggy LA...sometimes in the summer, especially back in the '60s it got pretty much impossible to get a deep breath! I appreciate anything which helps get the crap out of the air!
If your cat's plugged, you'll KNOW it! The car will just have no power. Discovered this on the way to work one morning...climbing my steep hill (1.8 miles to gain 800 feet altitude) in my Lincoln...suddenly had no power at all, but the car sounded OK. Everyone passing me (my boss gave me a strange look!). Crested the hill and was able to go fast again. Just couldn't accelerate.
__________________ "We are forces of chaos and anarchy. Everything they say we are we are, and we are very proud of ourselves!" -- Jefferson Airplane
Dick Naugle says: 1. Prepare food fresh. 2. Serve customers fast. 3. Keep place clean.
on that new of a car, you'll gain little to nothing from removing the cats. power/FE gains are most noticeable in turbo engines and cars at WOT. hypermilers rarely if ever enter the range where losing the cat improves the situation (high revs high throttle). that being said, every engine/car responds differently.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"