Pros and Cons to deleting the cat?
#1
Pros and Cons to deleting the cat?
Ok so I've grown up in a state where we have yet to have emissions tests, and I've never heard anything good about a catalytic converter. But I've had 2 different people tell me lately that deleting the cats on gas or diesel engines will hurt gas mileage and performance. What are the true facts about his? I've got a friend wanting to know if he should pull his off of his 06 6.0 or leave it.
#2
I have mine deleted. It will help mpg's on diesels because of less resistance/ back pressure. Gas engine exhaust requires alot more back pressure. So i dont know about gas. I have seen a slight difference. Plus i have a straight pipe. I now get a highway average of 18.5 mpg's. I personally think anybody who says it doesnt help or will hinder the performance of a diesel by deleting the CAT doesnt mnow what their talking about. But i know alot of people who dont like them without the CAT cause of the noise.
#3
I have mine deleted. It will help mpg's on diesels because of less resistance/ back pressure. Gas engine exhaust requires alot more back pressure. So i dont know about gas. I have seen a slight difference. Plus i have a straight pipe. I now get a highway average of 18.5 mpg's. I personally think anybody who says it doesnt help or will hinder the performance of a diesel by deleting the CAT doesnt mnow what their talking about. But i know alot of people who dont like them without the CAT cause of the noise.
#6
#7
That's what he is saying...he drives it 2 hours on the interstate every weekend and clocks it. I'm not there with him but I mean he knows his math pretty well so I doubt he's doing some dummy calculations.
We thought about that, but if they start doing actual tests after doing the visual tests then he'll have to get a new cat...
We thought about that, but if they start doing actual tests after doing the visual tests then he'll have to get a new cat...
Trending Topics
#9
#10
Get a cat delete pipe!
I had bad turbo lag with the stock exhaust. Would step on the GO pedal and sometimes it was dead. Took out the cat and installed an MBRP delete pipe. Lost 50% of the turbo lag. Then put on the 4" MBRP T-back exhaust and disconnected the EGR valve and lost all turbo lag. Now I have a very old version of ECM software but with the MBRP, EGR cooler plugged and valve unplugged and the SCT tunes, I have never had another turbo lag issue.
I got 21 MPG with my X going from MD to AL running 70 to 80 MPH about 3 years ago with 4 adults, 2 kids, the back loaded and a trailer hitch carryall. At that time I had the Edge Juice tuner set on level 3. Now I get 18 MPG going from MD to MI with the SCT and the street tune.
I need to clean my MAF sensor and get ED @ FICM Repair to upgrade my FICM before it goes tango uniform. I'll probably see an improvement in MPG and performance.
DSMMH
I got 21 MPG with my X going from MD to AL running 70 to 80 MPH about 3 years ago with 4 adults, 2 kids, the back loaded and a trailer hitch carryall. At that time I had the Edge Juice tuner set on level 3. Now I get 18 MPG going from MD to MI with the SCT and the street tune.
I need to clean my MAF sensor and get ED @ FICM Repair to upgrade my FICM before it goes tango uniform. I'll probably see an improvement in MPG and performance.
DSMMH
#12
He said he resets his dash gauge right before he leaves and that's what it tells him. He said the first 10 or so times me hade the drive he did the calculations himself at the pump and it was within .5 of what his dash gauge says. He said his gauge has always been accurate, whether it's highway, city, or pulling his trailer. But he said he gets 21 highway, about 16 around town, and 12-13 pulling his 5,000lb trailer. And that's stock untuned. He just got a tuner and tunes yesterday but haven't been able to run them because the stupid plastic CAC pipe blew on his way to meet me with them.
#14
If your going to keep your stock exhaust...you can substitute a "factory delete" pipe from a '98 to '02 7.3L powered truck that was equpped with the slushbox. That's what I did with my truck. And my mileage improved about a mile to the gallon. I've still got the factory cat sitting on the shelf just in case the day comes and the tree huggers get their wish.....50 state emissions testing.