Like i posted, i have a one ball mod, just wanted to experiment, and came out pretty cool, love the sound, however, in my vocabulary the biggest purpose of an exhaust mod is to gain more hp through derestricting the gas flow, and this leads me to make a purchase of a complete system. Here is what i narrowed down my selection:
ALTA header+catback
Milltek header+catback

although the price of $1,500.00 plus is a big hit for my wallet, i will do the mod together and get over it. I want SS, for durability and longevity.

I really would like to hear from the owners that have the systems, instead of hypotetical talks. But at the same talking any positive input is appreciates.

And finally a question, with headers and exhaust, do i need to program the ECU? How much power gains am I looking?

Thanks for the help.

 

Well, hypothetically speaking...

 

XALFA, here you go again, i will ban you from my threads

 

Well, now, there you go again.

 

what's wrong with the magnaflow you have listed as one of your mods?

 

If I remember right he has a one-ball made with a magnaflow muffler. Sorry to answer for you Scuderia, but I am trying my hardest to procrastinate working today.

 

Why doesn't he just get the whole magnaflow exhaust?

 

have you decided on either one yet?

 

Yes

 

go miltek - miltek

 

GO Go

 

I have the Miltek header and exhaust with Alta CAI,my comment is the car is LOUD.Loud is good if you like the car to sound that way.Q

 

Well, i still am thinking, btw, yes i have Magnaflow muffler on my car, which me and a buddy of mine implemented for experimental purposes, which works real nice as far as the sound is concerned, however serious power gains is the ultimate intention and at that given point dropping a lot of money is unevitable. So the bottomline without contradicting myself or the fellow readers, if you are chasing nice sound, no need for an aftermarket catback system, oneball or a custom system is fine, however, for performance gains and FINE TUNING, aftermarket catback/header is the way to go. But still, so hard to justify all that money for pipes and mufflers, i guess we go back to the original point that Dr. and i were discussing/sharing previously; is it worth it?

Oneball, in professional hands would provide a nice, deep, torquer sound, which is currently accomplished on my car, well under $200.00, on the other side, if you add a resonator, the custom system becomes a little more complicated yet from a price point higher than oneball. All these are based on good quality or near quality materials used on the custom systems. With the resonator your cost, again, assuming that the same or near quality parts used, the total price will come near to a catback system. Might as well, get one and enjoy it.

I have been following the OBX header thread since last couple of days, and it follows the same path as my dilemna, aftermarket stuff for Mini are overpriced, which makes no sense, which is besides the point here anyways.

A lot of people are practicing oneball, creating different systems, which will lead the realization of how overpriced the aftermarket stuff are.

But for now, in the name of FINE TUNING, and having the mod combinations work in harmony in optimum performance, buying a catback/header is the easiest solution, so hurting to spend the money, but the car will sure benefit.

 

If you've been following the OBX thread then you've read the 100 reasons to buy and the 100 reasons not to buy BUT OBX offers an entry level header ($200) and an entry level exhaust ($300) for a grand total of 500.00. Hard to ignore.

Is it the best system out there? NO, but it allowed me to get $1000 worth of other HP adding mods which in my case was impossible to ignore.

If you want to see the best design concept system, go check out TonyB gallery. I say best because it uses least amount of tubing and least amount of bends. The beauty of this system is its clean simplicity. I am surprised that non of the vendors have developed a TonyB kit (especially with these new mini batteries available). For those that want to build their own system - this is the only way to go as far as I'm concerned.

 

Went with OBX Header and Milltek exhaust,but with a cabrio. not to many options.Satisfied with result.

 

Actually, Bart, a single exit, straight through, has more back pressure than a similarly configured dual-exit exhaust. It's all about surface area through the tubes: twice the area in the latter case means less back pressure. Dual-exit exhausts also tend to sound deeper/less raspy because of the extra resonance of the dual tubes. Yes, if you have two mufflers it reduces the gain by going to two pipes, but I can assure you that most of the dual-pipe systems have less back pressure than a single tube. The way to get maximum performance out of a straight through is by getting an adjustable backpressure muffler system, like the supertrapp, which lets you dial in the pressure for power purposes. Bottom line, the single exit, though it may look smooth, is more about weight savings and simplicity than about power...

Statement of intent: I really respect TonyB and like the guy a lot, so don't read this the wrong way. His approach to tuning is very intelligent, and I'm kinda really jealous of his weight savings accomplishments. But, I believe that I've seen him say that he did the straight through mostly for the weight loss [including lightweight battery and no battery box delete]. !

 

Your proabably correct on all accounts.

So is there a pressure difference if you have dual pipes - each 1.75 or a single pipe that is 3.25 ?

 

actually, a 2.5" (area of 4.91 sq.in.) pipe would flow about
as well as two 1.75" pipes (2.405 x 2 = 4.81 sq. in. total).
a 3.5" pipe has the same cross section as about 4 1.75" pipes.

 

So in theory - can a single sided system "equal" a dual system" And by equal I mean produce matching results - TQ and HP.

 

I talked to couple of Magnaflow dealers and they all said that the existing product is for up to 2004 models, and i really can not figure out but am thinking maybe the hangers? Anyways, Magnaflow is getting of the list, and lately i have been hearing about the Invidia, but am hesitant since not too many feedback recieved. Anyways, more than likely Milltek, i still have time on it, but will definetely order it tomorrow.

 

miltek / miltek !! otherwise obx/miltek works

 

Absolutely correct. But, not all dual-sided designs have 1.75" secondaries... Generally speaking, two from one reduces back pressure unless the two are kinda small, just as cristo has said.

 

Yes, but a single exit is very hard pressed to match the acoustic characteristics of a dual. They traditionally sound quite raspy, given that they have less surface area of tube per unit volume, and hence less sound attenuation.

 

So TonyB design with the right diameter tubing and correct muffler could match the HP & TQ of any other system out there. You just saying it wouldn't sound as good.

 

I suppose that's possible.