True Dual setup

[JonintheRedZ28]

I'm looking to run a true dual setup on my 98 Z28, it's not running quite yet, but I got a short-block and a 228/230 cam, and I'm looking to have my car sound like the world is ending lol. Anyone have some suggestions?

[Rhinohuey]

I've been looking into true duals also, and so far the best deals I've found are just to have a shop make them. Either way, dumped or over the axle, I've found this to be cheaper than ordering something and having to pay for shipping, etc.

[JonintheRedZ28]

That's what I was probably going to do, since I live about 8 minutes from a muffler shop.

[aerojt]

Are there dyno numbers out there to show a huge power gain? I'm just curious if this is really worth it or not....I'm sure it its, just wondered what the actual gains are.

[JonintheRedZ28]

Well, I was interested a little more in the sound than the power gain, since the stock idle is so quiet, all the ricers where I live go after my Z, "It's quiet, it can't be a real V8" so I got a cam and am most likely going true duals, if my math is correct, (from the stock exhaust) true duals will add about 30-40 hp (on crank)

[Rhinohuey]

I don't think there is a huge gain with true duals over a catback, but there is definately a noticable sound difference.

[JonintheRedZ28]

Yeah, when I said true duals add 30 hp, I meant from the stock exhaust.
I want them more for the sound.

[StuntmanMike]

Look into a good 3" or 3.5" single exhaust. I read an article in hot rod a awhile back, they said a good single can flow just as good as a dual setup.

As far as being loud, run a cutout, or maybe the SLP Loudmouth. I haven't heard one in person, but from what I've read on the board, it's pretty damn loud.

If you get one custom done, make sure they use a mandrel bender, you don't want the kinked bends that hurt the flow.

I really don't think duals make any difference when it comes to sound, and unless you're going with headers, X-pipe, high flow cats, etc., I think 30-40hp is really optimistic.

[mrr23]

I don't think there is a huge gain with true duals over a catback, but there is definately a noticable sound difference.

not huge, but definate gains throughout the entire rpm range

this is from the wife's car. had a 3" adjustable borla on her car with bassani headers and y-pipe. took the y-pipe and borla off and put the bassani tru-duals on. it comes with a x-pipe. this was on stock tune and stock cam.

http://stealthram.com/familypics/formula/dynos/borlavsbassani.jpg

[JonintheRedZ28]

A buddy of mine found a system (H pipe, mandrel bent) on LS1tech and I got in contact with the seller and paypaled him for it. Thanks for the input guys.
I'll post up a thread about the progress on my Z28 once I get back on it (I have to clean the garage and my parts first)

[ls1blackbeauty98]

when i was looking into TDs i was told that some fab had to go into them, which with me on a tight budget it was out of the question for me. i wasnt thrilled with the pipes dumping at the axle either, if u have the cash and dont mind the dump then go for it.

[9t8z28]

If you are gonna fab up a dual setup, go with an X-pipe.
H-pipes are old news and don't do as much as an X will.

[Rhinohuey]

H-pipe seems to sound a little better. X-pipe shows better gains though.

[9t8z28]

H-pipe seems to sound a little better. X-pipe shows better gains though.

Yes, an H-pipe will sound more like true duals that never cross. But it wants it real loud, so I can only assume he is gonna have it dump before the axle. You will barely be able to tell the difference from an X and an H on a setup like that. Go with an X and increase throughout the entire RPM range.

[NvyBluMtlc02WS6]

Texas Speed sells a true dual set-up. Dumps before the axle and sounds bad ass. Debating on whether or not to get this set up or go with a y pipe with dual cutouts when i get my headers.

[JonintheRedZ28]

Yes, an H-pipe will sound more like true duals that never cross. But it wants it real loud, so I can only assume he is gonna have it dump before the axle. You will barely be able to tell the difference from an X and an H on a setup like that. Go with an X and increase throughout the entire RPM range.

Actually the TD setup I found is an over-axle setup.
The Z28's already going to be close to 400 hp, so I'm not too worried about a few gains from an X pipe over an H pipe. I got pacesetter LTs coming, heads from an 02, Comp XER cam. Like I said, I want the exhaust to improve the tone.
The cam is what I want to add power :devil: the car's also getting dyno tuned once it's going. If I hit 380 rwhp I will be happy.

[9t8z28]

Actually the TD setup I found is an over-axle setup.
The Z28's already going to be close to 400 hp, so I'm not too worried about a few gains from an X pipe over an H pipe. I got pacesetter LTs coming, heads from an 02, Comp XER cam. Like I said, I want the exhaust to improve the tone.
The cam is what I want to add power :devil: the car's also getting dyno tuned once it's going. If I hit 380 rwhp I will be happy.

You found a TD system new or used?

[BULLET_WS6]

if you want to make it sound like the worlds ending.. i would have to recomend the tsp rumblers... i have heard those things on a car that runs a 6 second 1/8th... a little extreme yes... and a lot of the sound was coming from the high horsepower but that setup will let anysound you got come out

[JonintheRedZ28]

You found a TD system new or used?

Used.

[Wheeler99WS6]

TSP True duals for me. Docile at idle but Scream at WOT. I love em. No mistaking my car for anything under a V8. As MRRR23 showed you, its about 10-15 rwhp gain (TD setup) over a cat back.:seesaw:

[Wheeler99WS6]

www.LS1Sounds.com you can find the TSP true duals on here and listen, see what you think.

[slims00ls1z28]

I have TD's with flowmaster 1 chamber with nothing after the mpacesetters and MS3 cam. It definately will give you an unmistakable Cammed V8 sound.
Heres mine
http://s117.photobucket.com/albums/o60/slims00ls1z28/?action=view&current=IMAG0002.flv

http://s117.photobucket.com/albums/o60/slims00ls1z28/?action=view&current=IMAG0007.flv

http://s117.photobucket.com/albums/o60/slims00ls1z28/?action=view&current=IMAG0004.flv

Untuned so its a bit rougher than what it will sound like. Getting it dyno tuned this wednesday and will try to get some more vids of it up.

[TwiSSter418]

for what it's worth I went true dual on my car and with a bone stock ls1 and 1 3/4" longtubes it sounded like death. It really did sound like I had a big cam in it. I have 3" all the way back to dynomax (i think? the straight through mufflers). dumped before the axle. I hear that if you have turndowns it will rumble more. Which might be fun.

Here's the best picture I have of the exhaust
http://i7.photobucket.com/albums/y257/sslow2000/IMG_1970.jpg

and here's a crappy video
http://s7.photobucket.com/albums/y257/sslow2000/?action=view&current=70267898.flv

[BULLET_WS6]

for what it's worth I went true dual on my car and with a bone stock ls1 and 1 3/4" longtubes it sounded like death. It really did sound like I had a big cam in it. I have 3" all the way back to dynomax (i think? the straight through mufflers). dumped before the axle. I hear that if you have turndowns it will rumble more. Which might be fun.

Here's the best picture I have of the exhaust
http://i7.photobucket.com/albums/y257/sslow2000/IMG_1970.jpg

and here's a crappy video
http://s7.photobucket.com/albums/y257/sslow2000/?action=view&current=70267898.flv

niceeeeee car.. i lovee it