Contemplating new exhaust
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Postmaster
Joined: Mar 2005
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From: Earth
Contemplating new exhaust
Been driving the heck out of the 96 F150 I picked up and it seems like the catalytic converter(s) are not so good. The exhaust stinks and it feels like the engine struggles to breathe a bit at highway speeds. Highway speed between here and the deer lease is ~80 mph. A better breathing exhaust has got to help.
I've got a 3" converter sitting around, so I'm thinking about a single 3" exhaust. I had a similar system on the 302 in my old F250 (sans converter) and it worked well. Anyone running a 3" single on their 300?
I've got a 3" converter sitting around, so I'm thinking about a single 3" exhaust. I had a similar system on the 302 in my old F250 (sans converter) and it worked well. Anyone running a 3" single on their 300?
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Been driving the heck out of the 96 F150 I picked up and it seems like the catalytic converter(s) are not so good. The exhaust stinks and it feels like the engine struggles to breathe a bit at highway speeds. Highway speed between here and the deer lease is ~80 mph. A better breathing exhaust has got to help.
I've got a 3" converter sitting around, so I'm thinking about a single 3" exhaust. I had a similar system on the 302 in my old F250 (sans converter) and it worked well. Anyone running a 3" single on their 300?
I've got a 3" converter sitting around, so I'm thinking about a single 3" exhaust. I had a similar system on the 302 in my old F250 (sans converter) and it worked well. Anyone running a 3" single on their 300?
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Postmaster
Joined: Mar 2005
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From: Earth
Sweet, I ordered a giant 30" long Magnaflow straight-through muffler to go behind that 3" 3-way converter I had in the shed. Should free up the flow nicely and still be pleasant at highway speeds.
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Joined: Dec 2006
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From: Spokane, WA
Not enough flow restriction to make a difference especially using a contemporary high-flow Cat.
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Postmaster
Joined: Nov 2012
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From: Langley, BC
It makes enough of a difference to justify not bothering to replace it.
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Joined: Dec 2007
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From: Boise, Idaho
It's a social responsibility to replace it, not just a government enforced one. They're on there for a very good reason, and as being someone who's eyes burn from smog whenever there's a local inversion, I'll take every bit of clean air I can get.
A healthy cat has very little detrimental change on performance.
A healthy cat has very little detrimental change on performance.
Moderator
Joined: Dec 2007
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From: Boise, Idaho
Seriously, that kind of sarcasm isn't constructive or needed.
It's a mentality that affects everyone everywhere because people want a "little extra" at the expense of everyone else. It's not a mindset that should be propagated on the forums.
It's a mentality that affects everyone everywhere because people want a "little extra" at the expense of everyone else. It's not a mindset that should be propagated on the forums.
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Joined: Sep 2014
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From: like subarctic, brrr man!
It's a social responsibility to replace it, not just a government enforced one. They're on there for a very good reason, and as being someone who's eyes burn from smog whenever there's a local inversion, I'll take every bit of clean air I can get.
A healthy cat has very little detrimental change on performance.
A healthy cat has very little detrimental change on performance.
However, I installed an EFI on it, and plan to add the cat as well, and hook up the EGR as well. Just because it ain't there doesn't mean it shouldn't.
Yup, Imma greenie
better to build an old truck than throw it away and buy new.
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Postmaster
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From: Earth
Well the truck still has to pass inspection, if it's throwing a code because the converter has been removed it won't pass.
Since I'm replacing the stock 2" headpipes and 2.5" exhaust with 2.25" and 3" pipes AND replacing the 20 year old 2 converter system with a single 3" the exhaust will flow significantly more than it does now. Why not use a part that's gathering dust in my garage to keep it legal?
Since I'm replacing the stock 2" headpipes and 2.5" exhaust with 2.25" and 3" pipes AND replacing the 20 year old 2 converter system with a single 3" the exhaust will flow significantly more than it does now. Why not use a part that's gathering dust in my garage to keep it legal?
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Postmaster
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From: Earth
Yes, the truck has two O2 sensors upstream and one downstream from the converter. I'm pretty sure that's why there's no tailpipe test required for OBDII vehicles in Texas.