So me and my friend were bored today and it was rainy so we decided to pull off the exhaust and just let it run the catalytic converter. Sounds deep, it really growls. Are there any disadvantages to doing this? I don't really wanna put the exhuast back on cause' it's a *****.

 

Less back pressure without the muffler which means a little less power, some back pressure is a good thing, but to much is a bad thing.

 

Is this for sure? I have the same set up and want to know what the deal is.

 

I'm running no cats w/ a Flowmaster 40. I love it.

 

Yeah thats what I thought too

 

Some back pressure is required to make gobs of torque, but on the top end, the less back pressure the better. In the real world, I lose a bit of driving power when I uncork my exhaust vs. Warlock muffler & 2.5" Pipe.

 

Hey, Zardoz! A forgotten Sean Connery classic. I take it you've seen the movie, John?

I've run mine without the muffler before when the muffler got torn off when offroading in St. Clair and Centralia. Sounded really nice but little too loud for me for my daily driver -- but not obnoxious overall.

Running without a muffler is slightly more dangerous because your exhaust gases exit a little close to the cab for my liking. I'd pipe something up to get it back by the axle and dump it down (which is what I'm doing now) or out to the side. Just get the exit away from the cab some so there's less chance of CO getting to you.

 

I have mine run out the back in to duals.

Mr. Grggs, when you ran yours with out a muffler did you notice any change in performance?

 

No -- but I have a 3.0 so there is no performance, lol.

Seriously though, with 5 cats on the exhaust I never lacked for back pressure. I have a Flowmaster 40 (old school one, not the newer quieter ones) on there and it's deep but not loud.

Probably be louder when I rebuild this exhaust this weekend with the replacements for my stolen parts as I eliminated the California CAT's and only kept the federal ones.

 

Well I have an update. Just straight cat's was popping like a b*tch and I had no acceleration like was stated so I went out and bought Flowmaster. Got duals now and got my truck back so I'm happy :)

 

So you could really tell that much of a differance between straight pipe and muffler?