hollowed cat?
Thread Starter
Instructor
Joined: Apr 2007
Posts: 215
Likes: 1
hollowed cat?
I have an 84 that had muffler eliminaters on it when I bought it. I replaced the eliminater with the stock mufflers in hope to get rid of that "garbage truck" sound. It didn't help, actually the drone/reverb got worse. I wonder if the cat is hollowed out creating this horrible noise. Has anyone hollowed their cat and ended up with this condition?
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
I have an 84 that had muffler eliminaters on it when I bought it. I replaced the eliminater with the stock mufflers in hope to get rid of that "garbage truck" sound. It didn't help, actually the drone/reverb got worse. I wonder if the cat is hollowed out creating this horrible noise. Has anyone hollowed their cat and ended up with this condition?
Racer
Joined: Oct 2002
Posts: 416
Likes: 2
From: Westfield MA
I have an 84 that had muffler eliminaters on it when I bought it. I replaced the eliminater with the stock mufflers in hope to get rid of that "garbage truck" sound. It didn't help, actually the drone/reverb got worse. I wonder if the cat is hollowed out creating this horrible noise. Has anyone hollowed their cat and ended up with this condition?
Safety Car
Joined: Oct 2008
Posts: 4,022
Likes: 30
From: Los Angeles CA
The honeycomb core inside the converter on my '87 cracked and started to make an annoying rattle. I gutted it and put it back on. I really didn't notice any major increase in drone/reverb, but the exhaust smell was really bad pulling in and out of the garage. There was absolutely no performance increase with the gutted cat. I took it off after a few weeks and installed a new magnaflo cat. The new cat did slightly lower the exhaust tone and the car runs well with no difference in performance.
i have an 89, the po supposedly gutted the precats, so you are saying no sound diff with the gutted cats vs. non gutted.
yet the 2.5 inch carsound y pipe with cats while bigger was quieter overall that the stock with cats,
i thought it would be freeflowing hence more sound, comments?
