Cats or No Cats???

[WARP TEN]

Originally Posted by RussMcB

I've never heard of non-cat cars getting smells into the interior of a car. Is there an explanation of how and why?

My initial gut feeling is there must be an exhaust leak for that to happen.

Or maybe it's because gasoline is formulated differently now? Still not sure how straight pipes in place of cats would cause a smell (much less going into the car's interior).

No exhaust leak, Russ. Just an excess of hydrocarbons that the cats usually eliminate. If the car is just standing on a windless day or there is a slight tailwind, it is noticeable in the car. Or if you are just standing nearby or behind it. As noted before, I only notice it on a cold startup, and usually in my garage when I back out. And if I am driving my car it usually means the windows are open.-Bob

[GOLDCYLON]

Originally Posted by PhillipsLT5

Random Tech

Both Phil and I are running RTs. Its the right thing to do. 2nd choice is magnaflows

[KILLSHOTS]

I went with no cats when I installed my headers. After a 5-minute ride, I'd return to the house with my clothes stinking of exhaust, and this was after Boudreau had datalogged my car and worked with Marc the get the calibration correct.

It's not worth 5HP. If you go without cats, you'll most likely be sorry. Good luck.

[Billy Mild]

Originally Posted by KILLSHOTS

I went with no cats when I installed my headers. After a 5-minute ride, I'd return to the house with my clothes stinking of exhaust, and this was after Boudreau had datalogged my car and worked with Marc the get the calibration correct.

It's not worth 5HP. If you go without cats, you'll most likely be sorry. Good luck.

This was my issue.

[RICKYRJ1]

I have had no cats for 5 years now with no issues, smell or other

[FU]

The 441 is cat-less. After 4 set's of various cats , we decided to X them. The 441 inch engine just blows them out. Some cats did last a little longer than others.
Recent tuning minimizes the "gag" to the point where it is just about non existent.

[Billy Mild]

Originally Posted by FU

The 441 is cat-less. After 4 set's of various cats , we decided to X them. The 441 inch engine just blows them out. Some cats did last a little longer than others.
Recent tuning minimizes the "gag" to the point where it is just about non existent.

The most mods I will do are longtubes, ported plenum and injector housings, and tune. Other than that my car will stay mostly stock since I have a limited fun car budget. haha. Too many toys not enough budget for them all.