Cats are gone!
#1
Cats are gone!
So, after 325,000km I cut out the cats on my '03 S'crew. Making a long story short.............. its now a bit noisier, but my milage went up by approx 6MPG (maybe more) and it feels like I gained a few HP. The top cats were almost plugged completely and the bottoms werent far behind. I have no "air care" so there isnt any issues and the truck runs fine. The new engine can now take advantage of the balance of the goodies I installed when the new engine went in.
#2
So, after 325,000km I cut out the cats on my '03 S'crew. Making a long story short.............. its now a bit noisier, but my milage went up by approx 6MPG (maybe more) and it feels like I gained a few HP. The top cats were almost plugged completely and the bottoms werent far behind. I have no "air care" so there isnt any issues and the truck runs fine. The new engine can now take advantage of the balance of the goodies I installed when the new engine went in.
That was brilliant.
Sure, you may get better mileage than you were with defective converters, - no brainer, just like the rest.
Cool mod buddy.
Last edited by jbrew; 05-27-2012 at 12:58 PM. Reason: Coolness factor
#4
Yea, you won't loose torque or hp removing all four. What happens is you move the power band to higher rpms without tuning for it. Thus, losing your low end and some midrange IMO.
#5
You'll need a tune for it. If you just off the rears and run the smaller upstreams you won't have to tune; your still within parameters. All of them is the problem. I've never seen these plug in with material, but it's possible w/carbon. I've seen plenty that melt and close shut in a perfect circle from running additives lol. Mainly that Sea Foam crap. That stuff is a converters worst nightmare.
Yea, you won't loose torque or hp removing all four. What happens is you move the power band to higher rpms without tuning for it. Thus, losing your low end and some midrange IMO.
Yea, you won't loose torque or hp removing all four. What happens is you move the power band to higher rpms without tuning for it. Thus, losing your low end and some midrange IMO.