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.

 

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?

 

Hello?!?!?!11!?!

 

I've never seen one on an f-body. Try it out and post pictures.

 

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

 

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.

 

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...

 

Exactly. I'm normally not much into true duals, but this "Prochamber for an F-body" idea has me thinking.

If it could be fit well under an F-body with good clearance, flow, and power, I'd most definitely consider it!

 

Parallel thread in advanced tech section:
https://ls1tech.com/forums/advanced-engineering-tech/539757-terminator-boxes-underway-comments-appreciated.html

 

If you guys fab one up, don't forget the the pipe needs to extend into the chamber on the inlet side

 

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?

 

Thats the way David Vizard described it in one of his books. If I can find the book later, I'll quote it.

 

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

 

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.

 

Very cool

 

You sure thats not Vin Diesel on the right?

 

I can't wait to see your before and after dyno results. Please post them immediately.

 

Just buy an O-pipe.



More information in this link.

http://kalecoauto.com/index.php?main...&products_id=2








































Sorry, it's Friday.

 

this one is great!

http://kalecoauto.com/index.php?main...products_id=22