300 exaust help
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Joined: May 2004
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Think I got it
Just took a good look on the underside and discovered the local muffler shop did not come directly off the cat but came back a few inches and left a couple of inches of the old restricted pipe before the new 2 1/2". Will take it back next week and have them start the 2 1/2" right behind the cat before the reduction.
Tell your buddy with the Dodge to go all the way with 3" and a magnaflow. I like it and have had lots of compliments.
Tell your buddy with the Dodge to go all the way with 3" and a magnaflow. I like it and have had lots of compliments.
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Joined: Nov 2003
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From: Kalispell, MT
i'm runnin' 2 1/4" straight back into a 30" glasspack, no cat or anything, and it rumbles a little bit, but not quite how i want, and is fairly loud, but not as annoyingly so as what i want, so when i finish all my mods, i'm considering dual 2 1/4 exhaust into a pair of matched 24" glasspacks to see if that's what i want....
MontanaFord
MontanaFord
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Solution
I believe you are right about the two cats muffling all the sound. I think mine would be almost stock quiet without a muffler. Appears one or both of my cats are clogged because I can't imagine Ford wasting money on a muffler if all the noise was already taken care of upstream.
I didn't want to get rid of the cats but if they are muffling as much as they are I doubt if they are working. Think I will remove that entire section and replace it with a piece of clamped on straight pipe until I get the time and parts to replace all of it correctly with one genaric high flow cat.
I didn't want to get rid of the cats but if they are muffling as much as they are I doubt if they are working. Think I will remove that entire section and replace it with a piece of clamped on straight pipe until I get the time and parts to replace all of it correctly with one genaric high flow cat.
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Joined: Feb 2004
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From: Chicago
Originally Posted by oldntrd
I didn't want to get rid of the cats but if they are muffling as much as they are I doubt if they are working.
Dude if the cats are not working you will know my mustang has no cats and you can't stand behind it when it's running it stinks that bad. If you start the car and leave it in the garage with the motor running you would die after about 5 mins it's that much of a diffrence. My friends can smell my car on the E-way driving at 65 if there behind me.
Boing.2000 Mustang GT
O2 Sims passed the Sniffer IL 2004 with NO CATS!!!! I love OB2
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Really getting confused
Good info, thanks.
If I take a vacuim reading at idle then another at 1500 and another at 2000 rpm how much drop in vacuim would tell me I had a cat problem? Is this even a valid way of checking them?
A few years ago a buddy was about to pull his hair out trying to figure out why his wifes Nissan was so gutless when he tried this. His vacuim dropped to less than half the idle reading. A baffle in the muffler had gave up and was blocking things. New muffler and it was fine.
If I take a vacuim reading at idle then another at 1500 and another at 2000 rpm how much drop in vacuim would tell me I had a cat problem? Is this even a valid way of checking them?
A few years ago a buddy was about to pull his hair out trying to figure out why his wifes Nissan was so gutless when he tried this. His vacuim dropped to less than half the idle reading. A baffle in the muffler had gave up and was blocking things. New muffler and it was fine.
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