Better than an X or H pipe?
TECH Regular
Joined: Nov 2001
Posts: 470
Likes: 0
From: Plano, Tx.
Interesting idea with that box, I like to see somebody test it out.
I run Lane's true duals with a x-pipe 3" dumped at the axle with 12" bullets which are about 95% open air, and it's just a little bit more quiet than open headers (which I have drove around with
).
For true dual muffler guys I can see gaining some power with that chamber, but not on my setup.
I run Lane's true duals with a x-pipe 3" dumped at the axle with 12" bullets which are about 95% open air, and it's just a little bit more quiet than open headers (which I have drove around with
).For true dual muffler guys I can see gaining some power with that chamber, but not on my setup.
Has anyone pursued this?
I am thinking about it, but I am worried that the "wrong" sized box could cost power in terms of all of the crazy pressure waves doing the wrong thing. I have Kooks headers and was thinking of cutting an x-pipe in half, since I already have one for the dual system I am planning, and using it as the in and out section of the box. So something like this >=====< then go over the passenger side out to 2, 6" round magnaflow mufflers, with no cats. I am thinking that I can get off a little cheaper by not buying cats, and just having someone fab up this box with half x-pipe in and out. And hopefully if all of the theories are correct it wont be much louder than having gone with an x and cats.
What do you all think? If this seems like it could work then I am going to give it a try and save the money on cats. Does anyone know of any negative effects of the resonator box?
I am thinking about it, but I am worried that the "wrong" sized box could cost power in terms of all of the crazy pressure waves doing the wrong thing. I have Kooks headers and was thinking of cutting an x-pipe in half, since I already have one for the dual system I am planning, and using it as the in and out section of the box. So something like this >=====< then go over the passenger side out to 2, 6" round magnaflow mufflers, with no cats. I am thinking that I can get off a little cheaper by not buying cats, and just having someone fab up this box with half x-pipe in and out. And hopefully if all of the theories are correct it wont be much louder than having gone with an x and cats.
What do you all think? If this seems like it could work then I am going to give it a try and save the money on cats. Does anyone know of any negative effects of the resonator box?
Some exhaust companies are selling very big oval exhaust tubing. If you could buy a piece wide enough you could just run your pipes into a length of it. It would be easy to fabricate, you would have the option of welding in bends, and may even be cheaper than fabbing one out of sheet metal.
If I understand the theory correctly, then Vizards size recomendation would be a minimum size. If the idea is to trick the exhaust into thinking it has reached the atmosphere then a bigger chamber probably wouldn't do any harm, although it probably wouldn't have any benefit either.
Ken
If I understand the theory correctly, then Vizards size recomendation would be a minimum size. If the idea is to trick the exhaust into thinking it has reached the atmosphere then a bigger chamber probably wouldn't do any harm, although it probably wouldn't have any benefit either.
Ken
Teching In
Joined: Dec 2004
Posts: 8
Likes: 0
From: Minnesota
The company that built my 408 for my vette, has a shop car that they built also with a 408. They built and tested an exhaust "box" it was worth 20 horsepower to the wheels over the 3" x-pipe they had on it previous. The exhaust on their car consists of:
Stainless 1 7/8
Stainless Works 3" cat back. It's a pretty trick looking set-up with the box tucked neatly up under the car.
Stainless 1 7/8
Stainless Works 3" cat back. It's a pretty trick looking set-up with the box tucked neatly up under the car.
Good luck fitting them under the car too. They do sound good and make a defenity perf. difference, a buddy has them on a 5.0 stang. It hangs pretty low though and it really isn't that big.
Thanks for the ideas fellas, I am looking at 2 different routes right now, I want to have the "box" be larger enough so that if I chose to go the 383 or 402 route down the road everything will still be good to go. First would be the x in/out on a 30"x8"x3.5" box for 840in3. Second would be to cut 2, 3" pipe sections down one side, weld them together and do the x in/out ~6" = 28.27in2 area x 30" for a tube section of 848in3. (if the math did not own me) I like the second way a little better since I already have the materials, but it won't be a true 6" pipe, it will be 2, 3" pipes stuck together, so I'm not too sure what affect that would have on the volume. Any math guys have any input?
Once this is resolved, I can git-er-dun, once I find a good exhaust shop...
Once this is resolved, I can git-er-dun, once I find a good exhaust shop...
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Originally Posted by SSDude
I have never been interested in true duals. However, this thread fascinates me. If Tony Mamo or some other sponsor manufactured this box for mass sales, it would be a major hit. Imagine, the hp advantage of true duals with the racket of true duals.
If it could be fit well under an F-body with good clearance, flow, and power, I'd most definitely consider it!
Thread Starter
Joined: Nov 2001
Posts: 8,246
Likes: 34
From: Victoria, TX
Parallel thread in advanced tech section:
https://ls1tech.com/forums/advanced-engineering-tech/539757-terminator-boxes-underway-comments-appreciated.html
https://ls1tech.com/forums/advanced-engineering-tech/539757-terminator-boxes-underway-comments-appreciated.html
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
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Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
hmmm, why is that?
I was just going ot go from the half x-pipe into the box, where the box is initially the same width and height as the half x-pipe, and then in an inch or so go to full size. What benefit does the pipe going into the box a little have?
I was just going ot go from the half x-pipe into the box, where the box is initially the same width and height as the half x-pipe, and then in an inch or so go to full size. What benefit does the pipe going into the box a little have?
TECH Enthusiast
Joined: Jul 2002
Posts: 653
Likes: 0
From: Mannheim, Germany
Before anyone goes crazy cutting and welding, you might want to review the info directly from Vizard's book. There is more to it than just the volume. If that were the case, my 4" I pipe would serve as a pro chamber but we all know large diameter straight pipe isn't exacly quiet.
There are relationships between the dimensions that must be considered. I don't know what they are but I'm sure there are ideal dimensions to aim for.
.02
There are relationships between the dimensions that must be considered. I don't know what they are but I'm sure there are ideal dimensions to aim for.
.02
I finally got around to making the box, it is 24x8x4 for 768in3. So it is more than large enough for the stock displacement, and will still be big enough for a 383 should I go that route later on. I used 20ga cold rolled steel, welded it together, cut rough holes in the ends and painted it with high temp black paint. I should have everything that I need now to put it together. I hope to do a pre-dyno next week and then after getting it in doing another dyno to see what it does for the car. I will keep you all informed.
Last edited by Blk02Ls1A4; Oct 18, 2006 at 09:20 AM.
Originally Posted by Patrick G
I don't have merge collectors. This is what my exhaust looks like now...notice the dual 3" pipes going into the single 3" pipe and the 3" cutout. After that it goes back into my SLP dual dual from one of the flanged openings. The way my exhaust is right now, I lose about 6 rwhp going from open headers with extensions to my catted y-pipe and cutout. The difference between the cutout open and closed is an additional 12 rwhp/12 rwtq loss. Basically, I'm trying to pick up the 18 rwhp I'm losing running between my closed street exhaust and open headers. For my test, I'd have to do a before and after dyno test. I would run dual Dynomax Ultraflow mufflers on each bank near the bumper.
By the way, that's Paul from Thunder Racing on the left and Shane on the right.
By the way, that's Paul from Thunder Racing on the left and Shane on the right.
TECH Fanatic
Joined: Nov 2003
Posts: 1,241
Likes: 0
From: MD
Just buy an O-pipe.
More information in this link.
http://kalecoauto.com/index.php?main...&products_id=2
Sorry, it's Friday.
More information in this link.
http://kalecoauto.com/index.php?main...&products_id=2
Sorry, it's Friday.
