Good work Greg..

[Daniel Ciobota]

William et al.,

 I can attest to the neat indy sound gained with the "x pipe" merge mentioned
in your post.  A couple of companies sell these for mustangs, mine is a Dr.
Gas unit.  I tried to custom make one myself, but the tight radius required
due to the short distance between the collectors made it nearly impossible
without using expensive tubing.  I believe Dr. Gas can sell you just the x
piece for about $80 in a 2.5" or 3" diameter tube size.
 Btw, the sound is really awesome; I've had more than one car follow me to
work and asking me how I got my stang to sound like a ferrari.  I always smile
when I tell them it's just exhaust...

 To William, can you e-mail me off line the details of your header system you
built?  I don't know what motor you have (mine's a late model 302), but I've
always believed a properly designed exhaust can be worth as much if not more
than all the other aftermarket boltons most people slap on their cars...  I'm
still searching for the best exhaust for my car.

Daniel


William Northrup wrote:

>   The header design you spoke of is a very good design. There are easy
> ways and lazy ways to kinda accomplish the same thing but they will
> never reach that potential. I had a set try y's on my street Mustang that
> worked and sounded awesome. As my Mustang grew into the full race
> (road race) mode my needs changed. I built a set of custom try's (not a
> set of fancy under the pan types) with oversized tubing. The oversized
> tubing was used to soften jagged torque peaking. When you are in a long
> right-hand sweeper at 120mph in oversteer, the sudden application of
> torque is a bad thing. These headers teamed up with a merge in the
> tertiary pipes works very well. The merge was accomplished by cutting
> off the outside 1/2 off of two 3 inch 90's and welding them together in an
> x or )( fashion. At about 6000 RPM this setup would develop a beautiful
> Indy car like whine through 7500 RPM. Check out the next NASCAR
> restrictor plate race. Look carefully at the exhaust system as they fly
> through the air and you will see what I am talking about.
>
> Greg can you please elaborate more on that resonance/expansion
> chamber you were talking about? Thanks!