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Canucker
Dodge Dakota
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8/20/2002
17:17:13
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 Subject: High Flow Cats
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Message:
Is the cat on the 4.7L (2000) just an in and out (i.e. no auxilliary air input)?
From what I remember it is, and there is air going into the exhaust through the manifold???
Anyone know for sure?
If you look close at pictures of JBA headers, there's a small tube that looks like its going from the head to the header tube.
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j@aol.com
Dodge Dakota
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8/20/2002
17:49:41
| RE: High Flow Cats
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do you void your warrarty if you put on a high flow cat?
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Canucker
Dodge Dakota
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8/20/2002
18:19:37
| RE: High Flow Cats
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No. I don't think so
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PJ
Dodge Dakota
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8/20/2002
18:26:35
| RE: High Flow Cats
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Cat is just in and out on a 2000. Theres no emissions connected to the cat or the headers.
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PJ
Dodge Dakota
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8/20/2002
18:27:59
| RE: High Flow Cats
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Message:
I must add... there is an O2 sensor after the cat.
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J
Dodge Dakota
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8/20/2002
18:48:47
| RE: High Flow Cats
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Message:
If you by a High flow cat.. Then gut it all the way.. Will they know? what about the sensor?
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handi2
GenIII
8/20/2002
22:30:38
| RE: High Flow Cats
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Did I just read this correctly posted above.
(If you by a High flow cat.. Then gut it all the way.. Will they know?)
I think I have now heard it all.
http://photos.yahoo.com/handi254310
2002 Quad Cab SLT Plus 4.7 Every Available Option
Access Tonnoue Cover/Bedrug/360 Air Intakez/Jet Stage 2
180 Robertshaw/Roadmaster Active Suspension
Street Scene Grill Inserts
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Canucker
Dodge Dakota
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8/21/2002
10:42:12
| RE: High Flow Cats
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Message:
why buy a cat and then gut it!? ... easier and cheaper to remove the cat and put a straight pipe in ... but that would screw with your aft O2 reading .. would need an O2 box.
BUT if you bought a high flow cat ... it _should_ be as good as removing it (or as close as possible).
Thanks for the posts guys
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Canucker
Dodge Dakota
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8/21/2002
14:29:40
| RE: High Flow Cats
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Message:
Check this web link ... look at the bottom header, on the far right side, there's a tube going into the collector ... isn't that an air tube? ... look at the gasket underneath too, there's a hole for it, right outta the cylinder head. ...
http://www.truckperformance.com/display.image.php?image=jba_1949s_500.jpg
what does everyone make of it?
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PJ
Dodge Dakota
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8/21/2002
15:57:20
| RE: High Flow Cats
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Message:
That tube goes right back into the header. Its not any kind of emissions. Trust me on this one, there are no emissions equipment in the header.
I've done headers on the 4.7L, 3 times. There is a small exhaust tube there but it goes straight into the header or manifold. Thats why you can see the hole in the gasket.
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Canucker
Dodge Dakota
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8/21/2002
16:56:38
| RE: High Flow Cats
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why is it there? seems odd to me. Where does the other end of the tube go? to a port in the head? where does that port go? is it part of an egr system?
I'm just curious that's all.
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99Dak5.2L4x4
Dodge Dakota
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8/21/2002
17:22:05
| RE: High Flow Cats
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If you have a bad Cat... do you end up getting worse gas mileage?
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PJ
Dodge Dakota
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8/21/2002
19:11:14
| RE: High Flow Cats
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Message:
Yes it goes right into the head. I thoungt it was strange the first time I saw it too.
Can I send you a picture of the manifold in your email?
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Canucker
Dodge Dakota
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8/22/2002
11:44:55
| RE: High Flow Cats
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PJ:
yeah fire away ... as long as it's not too big (I think yahoo has a limit). If it is big, email me and I'll send you a different email address.
99Dak5.2L4x4:
Yes you would likely get bad mileage and a decrease in power ... depends on how it went bad though (i.e. is it clogged or blown out). Either way, you should get a check engine light or something.
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PJ
Dodge Dakota
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8/22/2002
14:10:24
| RE: High Flow Cats
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Message:
You've got mail!! It's 68K.
The hole goes right into the manifold. Most likely they were going to use it but the engine ran clean enough.
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Matt
Dodge Dakota
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3/17/2003
23:42:34
| RE: High Flow Cats
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Message:
Where can I buy a direct replacement high flow cat for an 98 4wd dakota???
Thanks matt
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