can i run dual-cats on AS&M headers?
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Joined: Dec 2001
Posts: 1,026
From: Ohio
can i run dual-cats on AS&M headers?
i have a dual cat camaro. was wondering if i could use the 93-95 AS&M midlengths and still use my cats. reasons being: 1. i heard emissions are headed to my county. 2. i just bought new 02's. 3. unless we're burning racing fuel, our cars smell horrible w/o cats, i like breathing clean air.
so do i have any option of keeping both cats or am i gonna have to convert to single cat and have my 02's programmed out.
i was thinking maybe some sort of custom y-pipe if i could find a good muffler shop.
thanks,
Michael.
so do i have any option of keeping both cats or am i gonna have to convert to single cat and have my 02's programmed out.
i was thinking maybe some sort of custom y-pipe if i could find a good muffler shop.
thanks,
Michael.
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Joined: Aug 2002
Posts: 986
From: texas
you sure can, you'll need the random tech dual cat y-pipe
http://www.thunderracing.com/index.c...ategoryid=1052
its on that link towards the middle of the page
http://www.thunderracing.com/index.c...ategoryid=1052
its on that link towards the middle of the page
Thread Starter
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Joined: Dec 2001
Posts: 1,026
From: Ohio
Originally posted by Terran2k
you sure can, you'll need the random tech dual cat y-pipe
http://www.thunderracing.com/index.c...ategoryid=1052
its on that link towards the middle of the page
you sure can, you'll need the random tech dual cat y-pipe
http://www.thunderracing.com/index.c...ategoryid=1052
its on that link towards the middle of the page
they do sell a package for the AS&M headers plus dual cat ypipe but if i already have the headers that doesn't help me...
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Joined: Oct 2001
Posts: 1,007
From: Folsom, CA, USA
Originally posted by mkent
the y-pipe they show says it's only for shorties or stock manifolds.
they do sell a package for the AS&M headers plus dual cat ypipe but if i already have the headers that doesn't help me...
the y-pipe they show says it's only for shorties or stock manifolds.
they do sell a package for the AS&M headers plus dual cat ypipe but if i already have the headers that doesn't help me...
Dave
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Joined: Dec 2001
Posts: 1,026
From: Ohio
Originally posted by LPEdave
That part 13-943003 should be what you need. When you install the AS&M headers on your car, the collectors end up where stock or shortie collectors are on the '93-5 cars. Double-check it when you order, but that looks like the right part. You'll probably also need an "S-pipe" on the outlet of the y-pipe. They probably sell them, I've got one I'd sell too.
Dave
That part 13-943003 should be what you need. When you install the AS&M headers on your car, the collectors end up where stock or shortie collectors are on the '93-5 cars. Double-check it when you order, but that looks like the right part. You'll probably also need an "S-pipe" on the outlet of the y-pipe. They probably sell them, I've got one I'd sell too.
Dave
thanks dave. what exactly are we calling the "s-pipe?"
i'm guessing that part number you just gave me cost about $550, do you know? and an s-pipe, what do they cost?
this sounds like it's going to be more expensive to do it the dual cats way so it will take me a few paychecks to save but this is the way i want to go.
right now it looks like i should just buy the FLP's.
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Joined: Oct 2001
Posts: 1,007
From: Folsom, CA, USA
Originally posted by mkent
\
thanks dave. what exactly are we calling the "s-pipe?"
i'm guessing that part number you just gave me cost about $550, do you know? and an s-pipe, what do they cost?
this sounds like it's going to be more expensive to do it the dual cats way so it will take me a few paychecks to save but this is the way i want to go.
right now it looks like i should just buy the FLP's.
\
thanks dave. what exactly are we calling the "s-pipe?"
i'm guessing that part number you just gave me cost about $550, do you know? and an s-pipe, what do they cost?
this sounds like it's going to be more expensive to do it the dual cats way so it will take me a few paychecks to save but this is the way i want to go.
right now it looks like i should just buy the FLP's.
This is the setup I run, it's been good.
Dave
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Joined: Mar 2002
Posts: 196
From: Tucson, Az
Its kind of ironic how timely some of these threads can be. Just today I ripped out my Random Dual Cat Y-Pipe that I had only bolted to my AS&Ms 400 miles ago. I have to say I was not impressed. They could be very nice components if they had engineered them correctly.
The reason I removed them is that they are sticking down about 1.5-2 inches below my K-member and it scraped quite a bit. I was suprised when I jacked up my car to find how badly they had been scraped up in such a short period of time. I have a stock a stock suspension, and I do have to travel on some rather hilly roads but this seems a little excessive.
Pipe sticking down
Scrape
Y-Pipe
In addition I was never able to get the top nut tight on the drivers side header flange. AS&M puts a crease in the pipe so you can get a socket on the nut using an extension. This Random pipe requires that you come in from the passenger side along the K member with a universal joint and some extensions. This gets the nut snug but I still ended up with a leak.
I don't know what I'm going to do. I am considering welding the AS&M Driver side pipe onto the random pipe and see if that works better. Currently I have reinstalled my old system until I can figure out what to do with this Y-Pipe.
Overall though I must say that I was not very impressed with the engineering on this pipe for over $500. I feel like I wasted a lot of money on this thing. Make me an offer if you really want one.
The reason I removed them is that they are sticking down about 1.5-2 inches below my K-member and it scraped quite a bit. I was suprised when I jacked up my car to find how badly they had been scraped up in such a short period of time. I have a stock a stock suspension, and I do have to travel on some rather hilly roads but this seems a little excessive.
Pipe sticking down
Scrape
Y-Pipe
In addition I was never able to get the top nut tight on the drivers side header flange. AS&M puts a crease in the pipe so you can get a socket on the nut using an extension. This Random pipe requires that you come in from the passenger side along the K member with a universal joint and some extensions. This gets the nut snug but I still ended up with a leak.
I don't know what I'm going to do. I am considering welding the AS&M Driver side pipe onto the random pipe and see if that works better. Currently I have reinstalled my old system until I can figure out what to do with this Y-Pipe.
Overall though I must say that I was not very impressed with the engineering on this pipe for over $500. I feel like I wasted a lot of money on this thing. Make me an offer if you really want one.
Thread Starter
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Joined: Dec 2001
Posts: 1,026
From: Ohio
well guys, i'm gonna have to sleep on this.
94sleeper, you've scared me a bit as you seem very disappointed with this whole set up as far as the engineering goes, but what about the performance? do you really want to sell your stuff? did you mean the entire setup (headers/y-pipe) or did you just mean the y-pipe?... whichever let me know what you'd take for them. i'm not looking to spend near as much as the price of the new stuff since i don't have that much money. email me at mkent93@yahoo.com and let me know.
dave, you seem to love yours and didn't have any problems with it. by the way you have a very nice web page and a very nice car.
thanks everyone,
Michael.
94sleeper, you've scared me a bit as you seem very disappointed with this whole set up as far as the engineering goes, but what about the performance? do you really want to sell your stuff? did you mean the entire setup (headers/y-pipe) or did you just mean the y-pipe?... whichever let me know what you'd take for them. i'm not looking to spend near as much as the price of the new stuff since i don't have that much money. email me at mkent93@yahoo.com and let me know.
dave, you seem to love yours and didn't have any problems with it. by the way you have a very nice web page and a very nice car.
thanks everyone,
Michael.
Registered User
Joined: Nov 2002
Posts: 496
From: windsor,on
go here
http://www.randomtechnology.com/chevrolet.html
for stainless its 953002 or 943002 for the steel one
i just put in the stainless steel one and found some issues too
to tighten the y-pipe to the drivers side header i had to remove the header and assemble those together first while floating in the car because the k-member was in the way of a bolt
on the passenger side the outer most bolt between the header and y-pipe i couldn't tighten and could not get a socket on it
the build was very good quality and the pipe looks good, just the location of the bolt holes in the header flanges sucks or they could of atleast dimpled the y-pipe there since they blocked the line in with a socket.
http://www.randomtechnology.com/chevrolet.html
for stainless its 953002 or 943002 for the steel one
i just put in the stainless steel one and found some issues too
to tighten the y-pipe to the drivers side header i had to remove the header and assemble those together first while floating in the car because the k-member was in the way of a bolt
on the passenger side the outer most bolt between the header and y-pipe i couldn't tighten and could not get a socket on it
the build was very good quality and the pipe looks good, just the location of the bolt holes in the header flanges sucks or they could of atleast dimpled the y-pipe there since they blocked the line in with a socket.
Thread Starter
Registered User
Joined: Dec 2001
Posts: 1,026
From: Ohio
Originally posted by steve40
go here
http://www.randomtechnology.com/chevrolet.html
for stainless its 953002 or 943002 for the steel one
i just put in the stainless steel one and found some issues too
to tighten the y-pipe to the drivers side header i had to remove the header and assemble those together first while floating in the car because the k-member was in the way of a bolt
on the passenger side the outer most bolt between the header and y-pipe i couldn't tighten and could not get a socket on it
the build was very good quality and the pipe looks good, just the location of the bolt holes in the header flanges sucks or they could of atleast dimpled the y-pipe there since they blocked the line in with a socket.
go here
http://www.randomtechnology.com/chevrolet.html
for stainless its 953002 or 943002 for the steel one
i just put in the stainless steel one and found some issues too
to tighten the y-pipe to the drivers side header i had to remove the header and assemble those together first while floating in the car because the k-member was in the way of a bolt
on the passenger side the outer most bolt between the header and y-pipe i couldn't tighten and could not get a socket on it
the build was very good quality and the pipe looks good, just the location of the bolt holes in the header flanges sucks or they could of atleast dimpled the y-pipe there since they blocked the line in with a socket.
Registered User
Joined: Nov 2002
Posts: 496
From: windsor,on
not yet, i just finished installing them and the ls1 front brake upgrade.
i am still running the stock cat back on them so i don't feel that i'm getting the full effect on them being installed. from driving in the city i don't notice a difference in the low end, might of lost a bit its hard to say, but up high it definitely pulls alot harder, from a roll on the highway its like a v8 instead of a 4 cylinder
hopefully within a week i should have some new times, but the air is crappy here now and my best was run in april with good air
if you are thinking of them, they are definitely an awesome header as taner told me, i do like them and am happy with them. i think that any header/y-pipe combo will probably have its little querks but i'm no expert.
just remember to route your wires in a safe spot, i used stock locations and had to get a longer wire for #8, other than that use the steel plug boots on the back 4 and put the head shields on those wires as well, i also used the thermal wrap tape around the starter wires and so on around the passenger side and put some on the heater box(black plastic box) to help disapate the heat and have had no problems so far. i will have pics soon to
steve
i am still running the stock cat back on them so i don't feel that i'm getting the full effect on them being installed. from driving in the city i don't notice a difference in the low end, might of lost a bit its hard to say, but up high it definitely pulls alot harder, from a roll on the highway its like a v8 instead of a 4 cylinder
hopefully within a week i should have some new times, but the air is crappy here now and my best was run in april with good air
if you are thinking of them, they are definitely an awesome header as taner told me, i do like them and am happy with them. i think that any header/y-pipe combo will probably have its little querks but i'm no expert.
just remember to route your wires in a safe spot, i used stock locations and had to get a longer wire for #8, other than that use the steel plug boots on the back 4 and put the head shields on those wires as well, i also used the thermal wrap tape around the starter wires and so on around the passenger side and put some on the heater box(black plastic box) to help disapate the heat and have had no problems so far. i will have pics soon to
steve
Thread Starter
Registered User
Joined: Dec 2001
Posts: 1,026
From: Ohio
yeah let me know when you get new times i'd like to see them.
great times by the way on your car the way it is. what is it running in crapy air though? i ran my best (posted below) and ever since then it has been hotter and i've been running consistent 14.4-14.5's. the mph has stayed at 97.xx but the 60's have been awful...i ran a 2.27 60' the other night and dind't really spin at all since i have 2.73s! everyone else with stock lt1s have been running about the same up there, some even slower so i guess it's just the track and air.
great times by the way on your car the way it is. what is it running in crapy air though? i ran my best (posted below) and ever since then it has been hotter and i've been running consistent 14.4-14.5's. the mph has stayed at 97.xx but the 60's have been awful...i ran a 2.27 60' the other night and dind't really spin at all since i have 2.73s! everyone else with stock lt1s have been running about the same up there, some even slower so i guess it's just the track and air.
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