What was your Gas Mileage/HP after Losing the Catalytic Converters

[YUOnDaGround]

Just as the title reads, for those of you who have gutted/deleted their cats or just welded in a test/straight pipe:

1. What was the change in your gas mileage?

2. What was the change in your HP/Torque?

Thanks for your time.

Bruce

 

[YUOnDaGround]

Maybe I should have asked:

Has anyone gutted their cats?

 

[smyrna13]

I could feel a little extra grunt to it, and it sounded a bit better, but gas mileage wise I'm not so sure about. I barely drove it before I cut em off. Sometime they will start throwing codes when you take them off tho. I cured that problem with spark plug non-foulers.

 

[YUOnDaGround]

I could feel a little extra grunt to it, and it sounded a bit better, but gas mileage wise I'm not so sure about. I barely drove it before I cut em off. Sometime they will start throwing codes when you take them off tho. I cured that problem with spark plug non-foulers.

What are "spark plug non-foulers"

---------- Post added at 04:41 PM ---------- Previous post was at 04:39 PM ----------

Just looked it up, never mind. Wouldn't a Black Bear tune take care of that situation too?

 

[JennaBear]

If your cats aren't plugged, I wouldn't recommend gutting them. Also, I would recommend just swapping them out for new ones if they are plugged.

 

[YUOnDaGround]

If your cats aren't plugged, I wouldn't recommend gutting them. Also, I would recommend just swapping them out for new ones if they are plugged.

Why wouldn't you recommend gutting them?

 

[HMFDZ28]

backpressure is not nessisarily a bad thing. These trucks come with a pretty well flowing exhaust to begin with. By gutting the cats the minimal gains on the topend you would gain AFTER A TUNE is not worth the loss of low end. Just get an exhaust and a tune. You'll be much better off.

 

[JennaBear]

For one, it is illegal, two, the stock cats are high flow cats so you are really not benefiting anything. Most people hate the extra noise as well.

 

[dwmmatt23]

i got one plugged cat throwing code p0420 i believe. however i live in california and what places are telling me is that i have to get them replaced from the dealer for like 1200. anybody gone through this here or done something else?

 

[YUOnDaGround]

i got one plugged cat throwing code p0420 i believe. however i live in california and what places are telling me is that i have to get them replaced from the dealer for like 1200. anybody gone through this here or done something else?

I think that I'd take the $70 per cat chance and have them put on by some body and see if it passes.