Hey all,
I'm the proud owner of a 92 RS. Pretty much stock but my stock exhaust (shafty) is getting bad (leaks, messed up cat, ect.). So I need a new one very quickly. But check out my problem, and please bear with me. I have a stock 305 but I'm going to change it to a very modified LS1 in the next year or two. So, it doesn't make sense to by a exhaust system that I'll have to replace again next year. So check out my idea.
-I'll stay with stock manifolds for now (again, doesn't make sense to change em again next year)
-Now this is where we get to some problems. My manifolds come together into one pipe (Y pipe right?) But I'd rather run duels. Can this be done? What do I need so I'll run two pipes instead of one.
-Ok, back into the meat. Next, each pipe will have an exhaust cutout (is this legal?) with a switch (Like im really crawling under my car before a race to remove the wingnuts).
-Next, Dynomax Cat on each pipe ( I know, I know. But here in VA, Cats are manditory).
-Straight pipes back to a Borla Muffler on each pipe. ( havn't decided on which one yet).
-Four pipes leaving out the back. All inline like the new Vettes.
What do you think? Can It be done? Yes, I know it will cost alot, but can it physically be done? The big question is about the Y pipe conversion to true duels.
Thanx for all your help.
Jeremy
92 RS
Just in cause the above confuses you, this is a rough diagram to how its supposed to look.
(__) <~~~305 engine
| |
* * <~~~ Exaust cutouts
| |
{} {} <~~~Cats
\ /
[] [] <~~~Mufflers
|| || <~~~ Pipes out da back
I'm the proud owner of a 92 RS. Pretty much stock but my stock exhaust (shafty) is getting bad (leaks, messed up cat, ect.). So I need a new one very quickly. But check out my problem, and please bear with me. I have a stock 305 but I'm going to change it to a very modified LS1 in the next year or two. So, it doesn't make sense to by a exhaust system that I'll have to replace again next year. So check out my idea.
-I'll stay with stock manifolds for now (again, doesn't make sense to change em again next year)
-Now this is where we get to some problems. My manifolds come together into one pipe (Y pipe right?) But I'd rather run duels. Can this be done? What do I need so I'll run two pipes instead of one.
-Ok, back into the meat. Next, each pipe will have an exhaust cutout (is this legal?) with a switch (Like im really crawling under my car before a race to remove the wingnuts).
-Next, Dynomax Cat on each pipe ( I know, I know. But here in VA, Cats are manditory).
-Straight pipes back to a Borla Muffler on each pipe. ( havn't decided on which one yet).
-Four pipes leaving out the back. All inline like the new Vettes.
What do you think? Can It be done? Yes, I know it will cost alot, but can it physically be done? The big question is about the Y pipe conversion to true duels.
Thanx for all your help.
Jeremy
92 RS
Just in cause the above confuses you, this is a rough diagram to how its supposed to look.
(__) <~~~305 engine
| |
* * <~~~ Exaust cutouts
| |
{} {} <~~~Cats
\ /
[] [] <~~~Mufflers
|| || <~~~ Pipes out da back
Sorry, They kinda butchered my diagram. Hopefully you still get the jist.
JS
JS
Duals on an L03 seems like a waste to me, if you're just gonna rip it out.
Why not, look into a Hooker or Pacesetter cat-back. The Hooker is $200 , will need minor fab work, or get the direct bolt on for $260.
sound clip in the sig.
Congrats on the car, click my sig pic.
Getting cutouts when using stock manifolds, isn't a smart choice, as you'll still have that bottle neck before the cut outs, they're illegal to uncap on the street as well.
Why not, look into a Hooker or Pacesetter cat-back. The Hooker is $200 , will need minor fab work, or get the direct bolt on for $260.
sound clip in the sig.
Congrats on the car, click my sig pic.
Getting cutouts when using stock manifolds, isn't a smart choice, as you'll still have that bottle neck before the cut outs, they're illegal to uncap on the street as well.
Thanx for the reply, but I think your a little confused. The whole point of the duels is because Im ripping out the L03 and putting in the LS1. I need a new exhaust now, so It doesn't make sense to change the exhaust with a new engine. It's a waste of money. But Mark, do you think this set up is possible? Sense we do have low cars you know.
JS
JS
Duals are possible, just search on here for them.
The problem you will have though, is running duals off the stock manifolds.. That may end up being tricky, and by the time you put in the LS1, the exhaust will have to be changed, since I'm sure you'll have headers and the pipes will need a different routing.
Don't just think that the duals you might install now will hook right up to an LS1.
You could always buy a cat-back like I suggested then resell it later on. You shouldn't have any trouble selling a Hooker cat-back, the way I advertise them on this board, lol.
Maybe someone can give you some info to push you in the direction you want, I'm just not seein it happening.
The problem you will have though, is running duals off the stock manifolds.. That may end up being tricky, and by the time you put in the LS1, the exhaust will have to be changed, since I'm sure you'll have headers and the pipes will need a different routing.
Don't just think that the duals you might install now will hook right up to an LS1.
You could always buy a cat-back like I suggested then resell it later on. You shouldn't have any trouble selling a Hooker cat-back, the way I advertise them on this board, lol.
Maybe someone can give you some info to push you in the direction you want, I'm just not seein it happening.
Supreme Member
yeah Mark doesnt seem to understand what you are talking about at all...just ignore him..
if you want to build a system like that, you certainly can. you will need flanges on the "down pipes" (the exhaust pipes that come down off the manifolds and then bend into the exhaust under the car; thats not the best description...sorry) to attach to the factory manifolds (this part would really be easier with some headers, flowtech shorties are great for the money, and they dont want alot of money for them). as for the cutouts, the McCord power plate II is one option. they have small electric motors that open and close the cutout via a switch inside the car. the rest of the system is okay, but i would consider just dumping the exhuast before the rear axel. this is the cheapest way to do it. you could get pipes bent to go over the axel, but i would rule out the quad pipes at the end. that makes it too complicated and stuff. dynomax makes round bullet mufflers which flow great and will give you the most ground clearance. do a search for dual exhaust, there are some great setups here and some excellent pictures of them.
as for when you swap in the LS1, you will have to change (ie cut off and weld in new pipe) the "down pipes" the pipes that bolt to the manifolds or headers to line up with the LS1 headers or manifolds but it wont be too hard. they even make longtube headers for the LS1s, so you could use those, weld the collectors to the exhaust pipe and them bolt the system up to the headers.
good luck with the project.
if you want to build a system like that, you certainly can. you will need flanges on the "down pipes" (the exhaust pipes that come down off the manifolds and then bend into the exhaust under the car; thats not the best description...sorry) to attach to the factory manifolds (this part would really be easier with some headers, flowtech shorties are great for the money, and they dont want alot of money for them). as for the cutouts, the McCord power plate II is one option. they have small electric motors that open and close the cutout via a switch inside the car. the rest of the system is okay, but i would consider just dumping the exhuast before the rear axel. this is the cheapest way to do it. you could get pipes bent to go over the axel, but i would rule out the quad pipes at the end. that makes it too complicated and stuff. dynomax makes round bullet mufflers which flow great and will give you the most ground clearance. do a search for dual exhaust, there are some great setups here and some excellent pictures of them.
as for when you swap in the LS1, you will have to change (ie cut off and weld in new pipe) the "down pipes" the pipes that bolt to the manifolds or headers to line up with the LS1 headers or manifolds but it wont be too hard. they even make longtube headers for the LS1s, so you could use those, weld the collectors to the exhaust pipe and them bolt the system up to the headers.
good luck with the project.
I'd check with local laws first, here in MD exhaust exiting before the rear tires is illegal.
Also, I know what he wanted to do is possible, but I look at it like this 1-2 yrs is a bit of time, why not enjoy a nice cat-back that won't be overkill on an L03? and then just sell it later on .
What size piping are you going to get? I bet if you plan to get 2.5" sizing or so, that will be overkill for your LO3, and it won't perform as well.
Talkin about doing all this, to only go back and cut what you did to reinstall something else, seems like just as much work and money as buy a quality cat-back, then just selling the cat-back.
Just my .02.
Also, I know what he wanted to do is possible, but I look at it like this 1-2 yrs is a bit of time, why not enjoy a nice cat-back that won't be overkill on an L03? and then just sell it later on .
What size piping are you going to get? I bet if you plan to get 2.5" sizing or so, that will be overkill for your LO3, and it won't perform as well.
Talkin about doing all this, to only go back and cut what you did to reinstall something else, seems like just as much work and money as buy a quality cat-back, then just selling the cat-back.
Just my .02.