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4door4x4
Dodge Dakota
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5/20/2002
17:24:22

Subject: hi-flo cats
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thinking about getting a hi-flo cat, and was wondering what the difference between "with air" and without is, and is one "better" than the other. currently looking at either carsound or magnaflow. any comments???

Ray



R/Truck
Dodge Dakota
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5/20/2002
18:36:11

RE: hi-flo cats
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First off Magnaflow makes Carsound, they are one in the same. I got the one without air. They do flow better then the stock ones, I have the carsound on mine.



4door4x4
Dodge Dakota
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5/20/2002
19:04:32

RE: hi-flo cats
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i knew they were made by the same co. the stock converter is no air, and that's the way i was leaning. thanks for the input.



4door4x4
Dodge Dakota
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5/20/2002
19:04:59

RE: hi-flo cats
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i knew they were made by the same co. the stock converter is no air, and that's the way i was leaning. thanks for the input.



4door4x4
Dodge Dakota
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5/20/2002
19:08:40

RE: hi-flo cats
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i knew they were made by the same co. the stock converter is no air, and that's the way i was leaning. thanks for the input.



4door4x4
Dodge Dakota
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5/20/2002
19:10:11

RE: hi-flo cats
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stupid computer!



hardbody
Dodge Dakota
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5/21/2002
01:24:41

RE: hi-flo cats
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"With air or without" refers to whether or not the factory cat has an air tube going to the cat, I know my 4.7 doesn't have the air tube pretty sure none of the dakota cats do. If yours doesn't, get the "no air" cat, if you get the one "with air" all you'll end of doing is leaving the cap on it anyway



hardbody
Dodge Dakota
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5/21/2002
01:24:42

RE: hi-flo cats
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"With air or without" refers to whether or not the factory cat has an air tube going to the cat, I know my 4.7 doesn't have the air tube pretty sure none of the dakota cats do. If yours doesn't, get the "no air" cat, if you get the one "with air" all you'll end of doing is leaving the cap on it anyway



hmmm
Dodge Dakota
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7/20/2004
23:54:01

RE: hi-flo cats
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what does this air tube do?



Bob Lincoln
Dodge Dakota
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7/21/2004
08:43:48

RE: hi-flo cats
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It allows air to be suctioned into the catcon from the air cleaner via a one-way check valve. It lowers CO emissions quite a bit, and HC to a lesser extent. Use it if ya got it.



hmmm
Dodge Dakota
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7/21/2004
19:15:21

RE: hi-flo cats
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so basically air from the air intake is suctioned into the exhaust stream to add oxygen?



Neil
Dodge Dakota
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7/26/2004
15:44:43

RE: hi-flo cats
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It's not going to go from the intake to the cat. The intake is a vacuum. I believe you are confusing an EGR system. Some vehicles have an engine driven air pump which discharges into the exhaust to aid with comblete combustion of the exhaust gases.



mikey
Dodge Dakota
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7/27/2004
15:13:06

RE: hi-flo cats
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any body got a part number for carsound hi flow precats for my 5.9?



Bob Lincoln
Dodge Dakota
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7/27/2004
19:57:21

RE: hi-flo cats
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"so basically air from the air intake is suctioned into the exhaust stream to add oxygen?"
Yes. This is how it is set up on the 4 cylinders, anyway. Don't know if other engines used this technique.

"It's not going to go from the intake to the cat. The intake is a vacuum. I believe you are confusing an EGR system. Some vehicles have an engine driven air pump which discharges into the exhaust to aid with comblete combustion of the exhaust gases."
No, it DOES suction the air from the air cleaner through a one-way valve and into the catcon. The exhaust flow provides enough suction to do this. That's what the "with or without air" option means. I know about the 1970's vintage air pump to which you refer, but that's not what they're specifying. Those old air pumps had a soft metal tube that led to the exhaust manifold and injected the air there. They often backfired and caused all kinds of problems.



Neil
Dodge Dakota
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7/28/2004
08:26:03

RE: hi-flo cats
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I do appologize if there was such a system. My 89 Mustang 5.0 has a belt driven air pump discharging to the thermactor system. The thermactor system has a diverter which during warm up sends the air to a passage in the exhaust ports of the heads for warm up emissions. After warm up, the air is diverted to the air tube on the second set of catalytic converters. (4 cats total. 2 pre cats, two main cats). The Mustang also has an Exhaust Gas Recirculation System EGR (as did the older Daks) that routs exhaust gas back into the intake for emissions.



Neil
Dodge Dakota
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7/28/2004
08:26:49

RE: hi-flo cats
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I do appologize if there was such a system. My 89 Mustang 5.0 has a belt driven air pump discharging to the thermactor system. The thermactor system has a diverter which during warm up sends the air to a passage in the exhaust ports of the heads for warm up emissions. After warm up, the air is diverted to the air tube on the second set of catalytic converters. (4 cats total. 2 pre cats, two main cats). The Mustang also has an Exhaust Gas Recirculation System EGR (as did the older Daks) that routs exhaust gas back into the intake for emissions.



mikey
Dodge Dakota
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7/30/2004
17:45:47

RE: hi-flo cats
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darn it i need a part number.



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