Switched up the exhuast - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 04-07-2008
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Switched up the exhuast

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 *****.
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Old 04-07-2008
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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.
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Old 04-07-2008
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Originally Posted by Trigger01 View Post
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.
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Old 04-08-2008
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I'm running no cats w/ a Flowmaster 40. I love it.
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Old 04-08-2008
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Is this for sure? I have the same set up and want to know what the deal is.
Yeah thats what I thought too
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Old 04-08-2008
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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.
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Old 04-08-2008
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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.
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Old 04-08-2008
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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?
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Old 04-08-2008
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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.
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Old 04-12-2008
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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 :)
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Old 04-12-2008
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So you could really tell that much of a differance between straight pipe and muffler?
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