A culmination of exhaust questions
A culmination of exhaust questions I've been looking around for quite a bit, and have finally decided what I want to do with my exhaust. Now, I have to worry about the CA smog *****, though, so I was hoping you guys could help me out with it.
1. I read in a post here that dumping before the axle was actually not illegal, as long as they were dumped a couple inches away from the fuel lines, etc. He said that the documentation was buried in the dmv website somewhere. I looked for quite awhile, but to no avail. Could anyone help enlighten me?
2. Is it possible to do a true dual, x pipe setup that bolts to the stock cats? What are the costs involved?
I plan on getting some of the edelbrock shorties (or TES, to be official), and would like to run that through the stock cats, to a fabbed x-pipe, through a pair of Sweet Thunder chambered mufflers, then dumped before the axle. Is this possible?
Someone posted this videoclip of the Sweet Thunders making a whooshing sound: http://www.ls1poweredta.com/videos/s...underincar.wmv . Contrary to the other peoples' opinions, I actually really like that sound. Almost sounds like a turbo, to me. It's quite appealing. Would my planned setup sound similar? That particular video is through the stock manifolds and y, then through a loudmouth with the Sweet Thunder in place of the resonator.
Thanks to anyone who helps. I know it must seem like I'm lazy and don't want to do my research, but I've been searching for quite awhile, but finally decided to ask you guys for help, since I couldn't find what I needed.
1. I read in a post here that dumping before the axle was actually not illegal, as long as they were dumped a couple inches away from the fuel lines, etc. He said that the documentation was buried in the dmv website somewhere. I looked for quite awhile, but to no avail. Could anyone help enlighten me?
2. Is it possible to do a true dual, x pipe setup that bolts to the stock cats? What are the costs involved?
I plan on getting some of the edelbrock shorties (or TES, to be official), and would like to run that through the stock cats, to a fabbed x-pipe, through a pair of Sweet Thunder chambered mufflers, then dumped before the axle. Is this possible?
Someone posted this videoclip of the Sweet Thunders making a whooshing sound: http://www.ls1poweredta.com/videos/s...underincar.wmv . Contrary to the other peoples' opinions, I actually really like that sound. Almost sounds like a turbo, to me. It's quite appealing. Would my planned setup sound similar? That particular video is through the stock manifolds and y, then through a loudmouth with the Sweet Thunder in place of the resonator.
Thanks to anyone who helps. I know it must seem like I'm lazy and don't want to do my research, but I've been searching for quite awhile, but finally decided to ask you guys for help, since I couldn't find what I needed.
1st off CA sucks! Technically none of your plans are legal. You need to maintain the stock exhaust configuration(IOW single exhaust). If your exhaust comes out the back in stock form, then it has to stay that way technically. You can basically run a CARB legal shorty and good catback for 100% legality, or say screw it, run longtubes and go somewhere that won't fail you on the visual. This whole CA visual thing is STUPID anyways. All that should matter is that your car passes the sniffer!
Well, I guess I can live without true duals =/. I *really* wanted the extra 'oomph' from the X pipe, though. Not to mention, I love turndowns dumped before the axle. I hate CA 
. Did you know that gas prices are going down like, $0.50 in every state except CA?
Anyway, what about the shorties, to the stock cats, to a TSP Rumbler with a Sweet Thunder muffler welded in the I pipe, and the dynomax bullet removed? Does anyone have any idea the gains I'll see? Right now I have the stock system, with a flowmaster muffler welded in place of the stock one. Came that way, with the car.
Is there a california legal replacement Y pipe? The stock one is so flat, I couldn't see that being good for flow. Are they included in catbacks?
. Did you know that gas prices are going down like, $0.50 in every state except CA?Anyway, what about the shorties, to the stock cats, to a TSP Rumbler with a Sweet Thunder muffler welded in the I pipe, and the dynomax bullet removed? Does anyone have any idea the gains I'll see? Right now I have the stock system, with a flowmaster muffler welded in place of the stock one. Came that way, with the car.
Is there a california legal replacement Y pipe? The stock one is so flat, I couldn't see that being good for flow. Are they included in catbacks?
Originally Posted by MrDomino
Well, I guess I can live without true duals =/. I *really* wanted the extra 'oomph' from the X pipe, though. Not to mention, I love turndowns dumped before the axle. I hate CA . Did you know that gas prices are going down like, $0.50 in every state except CA?
Anyway, what about the shorties, to the stock cats, to a TSP Rumbler with a Sweet Thunder muffler welded in the I pipe, and the dynomax bullet removed? Does anyone have any idea the gains I'll see? Right now I have the stock system, with a flowmaster muffler welded in place of the stock one. Came that way, with the car.
Is there a california legal replacement Y pipe? The stock one is so flat, I couldn't see that being good for flow. Are they included in catbacks?
. Did you know that gas prices are going down like, $0.50 in every state except CA?Anyway, what about the shorties, to the stock cats, to a TSP Rumbler with a Sweet Thunder muffler welded in the I pipe, and the dynomax bullet removed? Does anyone have any idea the gains I'll see? Right now I have the stock system, with a flowmaster muffler welded in place of the stock one. Came that way, with the car.
Is there a california legal replacement Y pipe? The stock one is so flat, I couldn't see that being good for flow. Are they included in catbacks?
On The Tree
Joined: Dec 2005
Posts: 159
Likes: 0
From: Pacifica, CA
Originally Posted by Redneck Z
Dual exhaust is not legal though.
As far as I have been able to determine, running a true dual after the stock cat pipes is perfectly legal.
Am I missing something?
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Originally Posted by nautiboy
What about it is not legal? When I talked to the CA bureau of automotive repair and also to the smog referee (I'm working on a conversion, so need to make sure I'm going to pass), they indicated that you can do whatever you want after the cats.
As far as I have been able to determine, running a true dual after the stock cat pipes is perfectly legal.
Am I missing something?
As far as I have been able to determine, running a true dual after the stock cat pipes is perfectly legal.
Am I missing something?
ps. Is the car you are converting a 75 or older car?
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Joined: Dec 2005
Posts: 159
Likes: 0
From: Pacifica, CA
Originally Posted by Redneck Z
I think it depends on who you talk to. I have spoken to a ref as well. Not only that, but I believe it even says on the CARB website that you need to maintain the stock exhaust configuration.
But I guess if there's any question you (the person asking the original question) should talk to them directly.
I know I'm going to do a full dual-exhaust and I'm going to have the smog referee look at it when I'm done.
ps. Is the car you are converting a 75 or older car?
Originally Posted by Redneck Z
I think it depends on who you talk to. I have spoken to a ref as well. Not only that, but I believe it even says on the CARB website that you need to maintain the stock exhaust configuration. In otherwords no single to dual conversions. I also knew a guy with an LS1 conversion that tried to run duals, and was told by the ref to change it to a single, because the original car the LS1 came out of had a single setup from the factory.
ps. Is the car you are converting a 75 or older car?
ps. Is the car you are converting a 75 or older car?
The thing is, the sound of my exhaust is really important to me. The clip I posted is just about perfect sounding, including the whooshing. I really like the sound of chambered mufflers, but I can't afford to drop the dough for GMMG.
So, my two, hopefully final questions are this: what kind of gains might I expect? And, I know that whooshing sound I like is indeed restriction, but how much do I really stand to lose from it?
Thanks.