Is gutting converters bad for my truck?
#31
06-24-2010, 09:38 PM
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Oh, I was going off of an earlier post. If stock is clamped, then yes it is. Please explain what you meant. I didn't really understand about taking such and such off.
#32
06-24-2010, 09:46 PM
Cut off the ends of the converter (the mounting flanges) measure the overall length of the converter between the cut off flanges, add 2-1/2". Go to a muffler shop have them cut a piece of appropriate diameter pipe to length, flared on each end to go over the mounting flanges, buy some exhaust system permatex and 2 HEAVY duty muffler clamps. Smear the permatex liberally inside the flared ends of the straight pipe, assemble it to the mounting flanges and bolt down the muffler clamps on each end.......job finished, no muffler shop ever sees it.
Cutting the flange off the Y pipe leaves it with two pipes side by side to deal with, the O2 sensor is a couple inches or so forward of that point between the two pipes.
Have to cut the cat just behind the flange and weld up a "wide mouth" kinda deal to change to a single pipe at that point, using part of the cat to do it.
New section of pipe needs split down the middle and spread out, then a section added top and bottom to meet up to the flanged section your left with.
My 94 has already been done, I could post pictures if you don't follow what I mean. Was easy to do but yea you need a small welder to do it.
The cat has been removed and replaced with a section of 3" pipe/muffler/3" tail pipe.
#33
06-24-2010, 09:49 PM
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Don't know about the 302 but you can't do that with the 351, the Y pipe ends at the flange for the cat, no way a shop can make him a pipe to take its place as you suggest.
Cutting the flange off the Y pipe leaves it with two pipes side by side to deal with, the O2 sensor is a couple inches or so forward of that point between the two pipes.
Have to cut the cat just behind the flange and weld up a "wide mouth" kinda deal to change to a single pipe at that point, using part of the cat to do it.
New section of pipe needs split down the middle and spread out, then a section added top and bottom to meet up to the flanged section your left with.
My 94 has already been done, I could post pictures if you don't follow what I mean. Was easy to do but yea you need a small welder to do it.
The cat has been removed and replaced with a section of 3" pipe/muffler/3" tail pipe.
Cutting the flange off the Y pipe leaves it with two pipes side by side to deal with, the O2 sensor is a couple inches or so forward of that point between the two pipes.
Have to cut the cat just behind the flange and weld up a "wide mouth" kinda deal to change to a single pipe at that point, using part of the cat to do it.
New section of pipe needs split down the middle and spread out, then a section added top and bottom to meet up to the flanged section your left with.
My 94 has already been done, I could post pictures if you don't follow what I mean. Was easy to do but yea you need a small welder to do it.
The cat has been removed and replaced with a section of 3" pipe/muffler/3" tail pipe.
#34
06-24-2010, 10:00 PM
#35
06-24-2010, 10:01 PM
Don't know about the 302 but you can't do that with the 351, the Y pipe ends at the flange for the cat, no way a shop can make him a pipe to take its place as you suggest.
Cutting the flange off the Y pipe leaves it with two pipes side by side to deal with, the O2 sensor is a couple inches or so forward of that point between the two pipes.
Have to cut the cat just behind the flange and weld up a "wide mouth" kinda deal to change to a single pipe at that point, using part of the cat to do it.
New section of pipe needs split down the middle and spread out, then a section added top and bottom to meet up to the flanged section your left with.
My 94 has already been done, I could post pictures if you don't follow what I mean. Was easy to do but yea you need a small welder to do it.
The cat has been removed and replaced with a section of 3" pipe/muffler/3" tail pipe.
Cutting the flange off the Y pipe leaves it with two pipes side by side to deal with, the O2 sensor is a couple inches or so forward of that point between the two pipes.
Have to cut the cat just behind the flange and weld up a "wide mouth" kinda deal to change to a single pipe at that point, using part of the cat to do it.
New section of pipe needs split down the middle and spread out, then a section added top and bottom to meet up to the flanged section your left with.
My 94 has already been done, I could post pictures if you don't follow what I mean. Was easy to do but yea you need a small welder to do it.
The cat has been removed and replaced with a section of 3" pipe/muffler/3" tail pipe.
#36
06-24-2010, 10:01 PM
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#37
06-24-2010, 10:06 PM
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On F series, dual cats can be replaced w/ a single hi-capacity Cat. Cheaper/ better! Make sure they go up a size at the exhaust leg of the Y. (the Y should have a larger diameter leg out)
#38
06-24-2010, 10:09 PM
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#39
06-24-2010, 10:10 PM
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Well, you lost me. If stock 95's have a single one, then that's what I have.
#40
06-25-2010, 04:40 AM
#42
06-25-2010, 11:18 AM
What I would do if this was my truck was drop the Y pipe cut the exhaust right after the first cat. (Your truck will have two stock) Take a peice of pipe hollow out the front cat. Use some air to blow out all the reminates of the old cat. Put the Y pipe back up and take it to a muffler shop tell them you want your cat back exhaust. They will install the exhaust because you still have a cat there. (It's just empty but thats not their problem). It will then pass a visual inspection as well.
#43
06-25-2010, 11:27 AM
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What I would do if this was my truck was drop the Y pipe cut the exhaust right after the first cat. (Your truck will have two stock) Take a peice of pipe hollow out the front cat. Use some air to blow out all the reminates of the old cat. Put the Y pipe back up and take it to a muffler shop tell them you want your cat back exhaust. They will install the exhaust because you still have a cat there. (It's just empty but thats not their problem). It will then pass a visual inspection as well.
#44
06-25-2010, 01:06 PM
Ok here is a couple shots of my 94, snow plow truck that sits in the back field during the summer months so its a tad rusty. Makes it a little harder to see each piece.
First picture you can see where the inlet of the cat was cut off and used as a collector for the new section of pipe.
Should have taken one straight up but you should be able to see its two into one right there by its over all width.
Second picture, the section of pipe before the muffler takes the place of the one very large cat it used to have.
Third picture, a "off the rack" pre made 3" tail pipe available at any auto parts or muffler shop.
I didn't do the work, I could but don't like working on exhaust any more then I have to, I paid the local muffler shop 150 to do if for me. For that price and what was done, hardly worth messing with it myself. By the time I buy the muffler, the section of straight pipe and the tail pipe and add in my time its not worth it.
That and it was done late fall, they bring em inside where its warm rather then me laying in the cold rain in the driveway!
Now if yours has a 302 it might be different, based on some of the other comments posted here it must be. I don't see where you stated what motor yours has, if you did I missed it.
Best to make up a sig including that information on your truck.
You need to go look under it, see what you have to work with. If the Y pipe is rusty it might not be worth saving to start with. The Y pipes tend to be the longest lasting part of the factory system. Myself I use a pair of channel locks, squeeze the pipe here and there to gauge how stout it is yet before deciding what is usable yet and what has to go.
Anyway yea I agree with Old93junk, if you can swap it out with an easily produced straight section of pipe that is expanded at one end to fit over the Y pipe just do that.
Should fit over the Y pipe and inside the muffler, two clamps and your done.
Just jot down the length and diameter needed at each end and have em make you one up a minute.
Or remove the cat or cats, knock the crap out of them and put em back. If muffler clamped in place at both ends, don't recall ever seeing one like that, doing so without proper tools to deal with it, its not going to be a easy task.
First picture you can see where the inlet of the cat was cut off and used as a collector for the new section of pipe.
Should have taken one straight up but you should be able to see its two into one right there by its over all width.
Second picture, the section of pipe before the muffler takes the place of the one very large cat it used to have.
Third picture, a "off the rack" pre made 3" tail pipe available at any auto parts or muffler shop.
I didn't do the work, I could but don't like working on exhaust any more then I have to, I paid the local muffler shop 150 to do if for me. For that price and what was done, hardly worth messing with it myself. By the time I buy the muffler, the section of straight pipe and the tail pipe and add in my time its not worth it.
That and it was done late fall, they bring em inside where its warm rather then me laying in the cold rain in the driveway!
Now if yours has a 302 it might be different, based on some of the other comments posted here it must be. I don't see where you stated what motor yours has, if you did I missed it.
Best to make up a sig including that information on your truck.
You need to go look under it, see what you have to work with. If the Y pipe is rusty it might not be worth saving to start with. The Y pipes tend to be the longest lasting part of the factory system. Myself I use a pair of channel locks, squeeze the pipe here and there to gauge how stout it is yet before deciding what is usable yet and what has to go.
Anyway yea I agree with Old93junk, if you can swap it out with an easily produced straight section of pipe that is expanded at one end to fit over the Y pipe just do that.
Should fit over the Y pipe and inside the muffler, two clamps and your done.
Just jot down the length and diameter needed at each end and have em make you one up a minute.
Or remove the cat or cats, knock the crap out of them and put em back. If muffler clamped in place at both ends, don't recall ever seeing one like that, doing so without proper tools to deal with it, its not going to be a easy task.
#45
06-25-2010, 01:31 PM
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Ok here is a couple shots of my 94, snow plow truck that sits in the back field during the summer months so its a tad rusty. Makes it a little harder to see each piece.
First picture you can see where the inlet of the cat was cut off and used as a collector for the new section of pipe.
Should have taken one straight up but you should be able to see its two into one right there by its over all width.
Second picture, the section of pipe before the muffler takes the place of the one very large cat it used to have.
Third picture, a "off the rack" pre made 3" tail pipe available at any auto parts or muffler shop.
I didn't do the work, I could but don't like working on exhaust any more then I have to, I paid the local muffler shop 150 to do if for me. For that price and what was done, hardly worth messing with it myself. By the time I buy the muffler, the section of straight pipe and the tail pipe and add in my time its not worth it.
That and it was done late fall, they bring em inside where its warm rather then me laying in the cold rain in the driveway!
Now if yours has a 302 it might be different, based on some of the other comments posted here it must be. I don't see where you stated what motor yours has, if you did I missed it.
Best to make up a sig including that information on your truck.
You need to go look under it, see what you have to work with. If the Y pipe is rusty it might not be worth saving to start with. The Y pipes tend to be the longest lasting part of the factory system. Myself I use a pair of channel locks, squeeze the pipe here and there to gauge how stout it is yet before deciding what is usable yet and what has to go.
Anyway yea I agree with Old93junk, if you can swap it out with an easily produced straight section of pipe that is expanded at one end to fit over the Y pipe just do that.
Should fit over the Y pipe and inside the muffler, two clamps and your done.
Just jot down the length and diameter needed at each end and have em make you one up a minute.
Or remove the cat or cats, knock the crap out of them and put em back. If muffler clamped in place at both ends, don't recall ever seeing one like that, doing so without proper tools to deal with it, its not going to be a easy task.
First picture you can see where the inlet of the cat was cut off and used as a collector for the new section of pipe.
Should have taken one straight up but you should be able to see its two into one right there by its over all width.
Second picture, the section of pipe before the muffler takes the place of the one very large cat it used to have.
Third picture, a "off the rack" pre made 3" tail pipe available at any auto parts or muffler shop.
I didn't do the work, I could but don't like working on exhaust any more then I have to, I paid the local muffler shop 150 to do if for me. For that price and what was done, hardly worth messing with it myself. By the time I buy the muffler, the section of straight pipe and the tail pipe and add in my time its not worth it.
That and it was done late fall, they bring em inside where its warm rather then me laying in the cold rain in the driveway!
Now if yours has a 302 it might be different, based on some of the other comments posted here it must be. I don't see where you stated what motor yours has, if you did I missed it.
Best to make up a sig including that information on your truck.
You need to go look under it, see what you have to work with. If the Y pipe is rusty it might not be worth saving to start with. The Y pipes tend to be the longest lasting part of the factory system. Myself I use a pair of channel locks, squeeze the pipe here and there to gauge how stout it is yet before deciding what is usable yet and what has to go.
Anyway yea I agree with Old93junk, if you can swap it out with an easily produced straight section of pipe that is expanded at one end to fit over the Y pipe just do that.
Should fit over the Y pipe and inside the muffler, two clamps and your done.
Just jot down the length and diameter needed at each end and have em make you one up a minute.
Or remove the cat or cats, knock the crap out of them and put em back. If muffler clamped in place at both ends, don't recall ever seeing one like that, doing so without proper tools to deal with it, its not going to be a easy task.