Hey everyone, i live in the Chicagoland area and i found out about this german guy that builds custom exhausts and headers for people, from a friend of mine who took his Bimmer and STI to him. He doesn't have a shop, but he does it from his home on the side because he has the experience, knowledge, and tools. I went by his place to see if i can get an exhaust and a quote, and i asked how much it would be for a y-pipe and catback. Its not only the price and quality that impressed me, but his y-pipe was exactly like the new Motordyne with the removable cat and such. and i asked him if he searches on the forums on here and he said no. So its weird because he calculated that the y should be made earlier and he even installed a metal cat after the ypipe and recommended i put test pipes where the stock cats were. He did this all on his own, and the price for the ypipe with resonator is 350, and with cat 400. not a bad price at all, considering it is hand made and 304SS with all quality components and the motordyne one costs 535 with resonator i believe. Not bashing at all, but its a cheaper alternative. i was gonna go with motordyne off the bat, i even emailed Tony, but found this just now and it looked great. I might install my own resonator tho to save some cash. So i might just have to get that, and i asked if i can possibly get a deal for the forums. so after i get mine i'll post pics and vids, and if anyones interested i can get a group buy possibly? just wanted to give people the heads up, sorry i don't have pics yet, i'm just excited. the exhaust is a 3" from ypipe and he also builds 2.5 true duals made from same components as AAM exhausts but for less price.

 

I already got a headache from seeing that....

someone put it in paragraph form pleasee

 

Don't forget dyno also.

 

Just cuz I'm bored. . .

Hey everyone, i live in the Chicagoland area and i found out about this german guy that builds custom exhausts and headers for people, from a friend of mine who took his Bimmer and STI to him. He doesn't have a shop, but he does it from his home on the side because he has the experience, knowledge, and tools.

I went by his place to see if i can get an exhaust and a quote, and i asked how much it would be for a y-pipe and catback. Its not only the price and quality that impressed me, but his y-pipe was exactly like the new Motordyne with the removable cat and such. and i asked him if he searches on the forums on here and he said no.

So its weird because he calculated that the y should be made earlier and he even installed a metal cat after the ypipe and recommended i put test pipes where the stock cats were.

He did this all on his own, and the price for the ypipe with resonator is 350, and with cat 400. not a bad price at all, considering it is hand made and 304SS with all quality components and the motordyne one costs 535 with resonator i believe. Not bashing at all, but its a cheaper alternative. i was gonna go with motordyne off the bat, i even emailed Tony, but found this just now and it looked great.

I might install my own resonator tho to save some cash. So i might just have to get that, and i asked if i can possibly get a deal for the forums. so after i get mine i'll post pics and vids, and if anyones interested i can get a group buy possibly? just wanted to give people the heads up,

sorry i don't have pics yet, i'm just excited. the exhaust is a 3" from ypipe and he also builds 2.5 true duals made from same components as AAM exhausts but for less price.

 

I find the bold kind of funny. Not everyone just runs out and buys a system, many folks have spent a lot of time studying the dynamics of the exhaust and built it to work with the car they are building. I would be willing to bet this guy could tell you more than you could absorb in an hours time.

I'm researching the components for building my system. The first thing I noticed was the Y pipe is located in the wrong location, it's too far back to make good use of any worth while scavenging.

Also to keep costs reasonable, I'm using 16 gauge aluminized steel tubing. Stainless is nice, but the aluminized steel tubing will last longer than I'll own the car and it a lot cheaper.

Grab yourself a good book on exhaust dynamics and do some reading before you go back to the guy. Then you'll be able to ask some decent questions. Knowing most of the folks that do this type of work, they are more than happy to chit chat about it if they think you really want to learn.

 

hey man, i'm actually quite knowledgable about exhaust systems and pretty much anything aftermarket. i've researched everything possible, and in terms of ypipes the Motordyne design yields the best results according to Tony because the Y is closer to the engine, thereby creating the perfect amount of backpressure needed to gain horsepower while at the same keeping or adding torque that most people destroy when adding a true dual system to an NA car. I think the perfect exhaust for the an NA Z is test pipes, motordyne y-pipe with high flow cat, plus resonator and muffler. anything after the the motordyne y pipe won't really affect backpressure much, so you can just experiment with different mufflers and resonators to create the desired sound. i've been on the boards since 2003 and i know about pretty much everything that has gone through the boards.

- now this guy has a great system. and no he didn't fill my head with anything, he actually didn't talk good english, so he didn't talk at all. i scoped out the system myself and it is very close to the motordyne system which is proven in terms of where the bends were, the diameter of piping and the merge of piping. all perfect, and at a great price.

 

Ok read all post. ummm Whats the point of this thread?

 

yea i stated i'll get pics asap

 

I was not trying to insult you, I was trying to give you some advice for a person that can help you.

I've been at this stuff since I was 14, I'm 50 now. Great, so you've been on the boards. Most of the stuff I've seen on the boards is total BS, most folks have no clue as to what they are doing, but they can read the boards and spout the BS that they read.

I've propably built more systems than you have underware, but fine, I was only trying to give you some advice for the guy you'll be dealing with. Once you start spewing what you've read on the boards, you can figure this guy will be rolling his eyes and wanting you out of his shop.

Sorry, I should know better than trying to give any advice to folks that already know everything.

 

hey man now u insulted me. i said nothing like that to u. thanks for the advice, but u did make me out to be stupid without knowing me. i can fabricate myself and know quite a bit too. we're probably on the same page. i've built custom turbo kits for cars that don't have kits available for them yet. check me out on the mazda6club forums if you'd like i've built three custom turbo kits for the v6 of which no kits exist yet, but got stumped by tuning because there is no piggyback or ems for the ecu because it has not been cracked yet.

 

i can has build tubro kits but I no can tpye coherently!

 

Sorry, but when you mentioned correct back pressure, I assumed that you didn't understand the gas laws and how they flow.

My normal everyday job is industrial controls, petrochemical industy, been at it for over 30 years. I deal with flow, temperature, level, pressures, etc etc everyday. On anything from 500 megawatt turbines to tiny little heat exchangers and everything inbetween.

The term back pressure in exhaust systems has always made my skin crawl because it's one of those terms that was created back in the early days and has lingered ever since, and it's a false statement. I can not think of any instance in my entire career where back pressure has aided flow.

The term was originally created when folks didn't have a full understanding of simple gas laws PV=nRT where
P is the absolute pressure of the gas,
V is the volume of the gas,
n is the number of moles of gas,
R is the universal gas constant,
T is the absolute temperature

We know that as the exhaust pulse leaves the cylinders it begins to cool, so T is dropping. We also know that as the pulse begins to move that P begins to drop. n and R are relatively constant so to keep the formula happy, V increases and as V increase, it's going to cause more resitance to flow.

Where the term back pressure came from was folks putting to large of a runner in and allowing the pressure to decrease at a quicker rate, which in turn caused a more rapid expansion of the gas and causing more restriction to flow. The restriction to flow decreases velocity and it is the lower pressure behind the pulse created by the velocity which aids the scavenging for the next pulse.

It's also why header wrap works, it keeps the temperature of the pulse up.

Sorry for the rant, early morning after a hurricane scare and a few cups of coffee.

 

No offense, but building a turbo kit, which is basically putting parts together and bending a few pipes to fit within the engine compartment with a laundry list of necessary parts, is not the same thing as understanding a concept such as how exhaust gases flow and its optimum geometry.

 

I understand everything that your saying and I do know proper geometry and gas flows. I'm a young guy, I just finished my Bachelors in Chemistry at the University of Illinois, so the stuff you explained to me is first year chemistry that i took. Sorry i didn't copy and paste something off of howstuffworks.com to try and prove to people i know what i'm talking about, but anyone can do that, all you have to do is read for one minute at the right website and you know. I don't know why you would lecture me about " PV=nRt " when we did no talking about exhaust geometry, pressures and temperature the whole time.

- I started this thread to tell people about a y-pipe and exhaust system I saw that i examined and found to be very well built. I'm sorry that i did not give everyone my background information and previously attained knowledge, that would have just sounded stupid.

- Yes building a turbo kit is easy by attaining the right parts and putting them together, but you just contradicted yourself. Reason being I do know about exhaust flow and optimum geometry, and that is essential to building a quality turbo kit. You mean to tell me that all these companies building kits for the forum just threw parts together and whatever fit and said "**** lets see if she runs"? No. They have to pick the right turbocharger based on the motor and flow maps. They need the correct size charge piping, the ideal place for the BOV, etc etc.Someone without knowledge of this wouldn't know the simplest things of building a kit such as :what size charge piping or exhaust piping is needed for optimum efficiency. So without basic knowledge like this, a turbo kit cannot be built and ran correctly.

 

Congradulations on your degree.

Sorry if I mistook you for some one your'e not, this is the I net and many times a first impression is derived by a persons typing. Many of the "i"s not being capitalized lead me in a wrong direction.

With your degree and interest in cars you should do well, pick the Germans brain, he'll have a lot of good info they didn't teach in school and he maynot completely understand the why's but he'll know what works. You can help him on the why's.

 

Thanks man! ya, its internet talk. i'm the young generation so we have what you call "internat chat typing" hahaha. its basically a lazy version of typing that is usesless but i'm used to it. I realize it may lead people to think that the person typing is illiterate or stupid, but i'm not. just the way i type informally. and since i'm not typing a paper or to a dean of a school, i think its okay to type like this. thanks again for the congratulations, i appreciate it.

 

Cool, tell me how the pipes work out. I would be very interested in what he proposes. See if you can get the "why's" out of him, it may not be easy.

I used to deal with an old ex-navy German for drive shafts, the man could balance anything, but he was rather a cranky old fert. He would talk to you the whole time he was working, but one wrong question and you were out of the shop with an **** eating from snell.

 

Oh, I forgot, say hello to Chicago for me, Waukegan born Navy brat.

 

Still no pic yet?