LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

chambered true duals?

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Old 09-09-2003, 12:16 PM
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chambered true duals?

Anyone attempt this set-up?
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Old 09-09-2003, 01:30 PM
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im going to have mine done in a week or two...........using chambered mufflers from http://www.sweet-thunder.com

not really sure what lenght to use though, probably the shortest one 18" stainless
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Old 09-09-2003, 01:36 PM
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Yea thats where I found the mufflers. Which ones did you use?
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Old 09-09-2003, 03:12 PM
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Originally posted by FacelessZ
Yea thats where I found the mufflers. Which ones did you use?
i havent done it yet...........but im probably gonna order the 18" 304 stainless steel general use muffler, with a 3" diameter.

i have jethot longtubes..........so it will go to an Xpipe, then the mufflers, then dumps.
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Old 09-09-2003, 03:18 PM
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sounds good to me...do you think the 18" with the 3" inlet and outlet will fit?
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Old 09-09-2003, 04:18 PM
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Originally posted by FacelessZ
sounds good to me...do you think the 18" with the 3" inlet and outlet will fit?

im pretty sure it will..........look at this picture and you can see, those mufflers are about 12-14" im guessing...........so there seems to be room for 18" in the same location.

ill take pics when mine is done.
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Old 09-09-2003, 04:26 PM
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it does look that way...
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Old 09-09-2003, 04:28 PM
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anyone care to explain exactly how chambered mufflers work? My iroc had true duals with chambered mufflers when i bought it and i dont completly understand how the mufflers work. All i know is my car is LOUD and sounds awesome.
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Old 09-10-2003, 09:53 AM
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I got this reply from a guy at that web site:

2.5" diameter systems seem to be the most popular on Z-28's.

We're making them now and they will be ready the first of next week.

Call if we can be of more help.
231 775 0258 9 to 4 est.

Thanks for checking us out.
Mike C.

I've asked if the 3" inlet will work as well...will post...

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Old 09-10-2003, 09:57 AM
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Anyone can tell me if there is HP gain from true duals or are they strickly cosmetic?
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Old 09-10-2003, 10:00 AM
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Yes there is a hp and torque gain through true duals rather than any other cat-back. It simply 'opens' up your exhaust so that there is less restriction, therefore producing more torque and hp in general.

Having headers causes a small loss in torque, but it is compensated...
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Old 09-10-2003, 10:28 AM
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Originally posted by S.J.S.
Anyone can tell me if there is HP gain from true duals or are they strickly cosmetic?

it doesnt do much on a stock motor

but on a heads/cam or stroker, it can be an improvement.
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Old 08-24-2005, 04:24 AM
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Re: chambered true duals?

i have the same idea.

^concepts.. the first one would work out better because its nearly impossible to route pipes over the drivers side of the axle. The mufflers you see will be 18" sweet thunder chambered.
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