Re: The most EXPENSIVE moped exhaust ever: Build thread

simon thokaar /

weldwizard Jake Wrote:

> --------------------------------------------------

> So start planning your

> trip to Minneapolis for Casserollers Totfest 4

> August 29th-31st!

>

Damn that pipe is amazing. My mother recently moved to Eden Prarie.. maybe i can find a way up there to visit her and go to the rally instead!

Re: The most EXPENSIVE moped exhaust ever: Build thread

Sweet grilled cheezus! Sound clip please. And would love to hear how the super trapp-like baffle works out for you.

Re: The most EXPENSIVE moped exhaust ever: Build thread

Ѭ ɞŦЯʚOluv Ѫѫ /

Maize tried to touch my pee pee

Re: The most EXPENSIVE moped exhaust ever: Build thread

Wow. Having gone to school for machine shop and working in the field for many years I can appreciate the time to design and fab something and this turned out awesome. I'm sure it also took a lot of time to figure out how to best use the scrap for the right pieces.

Excellent write up and pics of the process. I'm also wanting to hear what this thing sounds like.

Re: The most EXPENSIVE moped exhaust ever: Build thread

barney gierer /

Good job.

Lets hear it... ive made several silencers but havent tried that style. I might try somrthing like that.

Thanks for documenting it so well.

Whats next?

Re: The most EXPENSIVE moped exhaust ever: Build thread

wow, Jake, that shit is incredible. So well planned and executed.

oh also army of one butt hole, the destroyer chamber is a copy of the doppler chamber with a different header.

Re: The most EXPENSIVE moped exhaust ever: Build thread

EVERYTHING IS TERRIBLE Wrote:

-------------------------------------------------------

> the destroyer chamber is a copy of the doppler chamber with a different header.

Right? So I've had a whole bunch of people tell me lately that I really should copy the destroyer chamber because its like the best and legendary performance. So yesterday I finally sat down and looked it up and it appears to be almost exactly the same as the Doppler! Ha! I guess that means I've already got one.

I really need to get my hands on a Destroyer to pull the dimensions and see just how similar it is.

Re: The most EXPENSIVE moped exhaust ever: Build thread

I didn't know that. i thought the destroyer was tuned from the average port numbers of a polini and gila.

Re: The most EXPENSIVE moped exhaust ever: Build thread

What temp does that metal melt? Looks good!

Re: The most EXPENSIVE moped exhaust ever: Build thread

So if I'm reading that price chart accurately then using 0.032" 12"x12"sheets of it at $326 per sheet, with 19 sections (not including the stinger section) comes to about $6194 for material. I don't know how much the welding rod is for inconel but I'm sure it's not cheap either. Plus the tubing section, and the whole titanium muffler you have almost $7k in the material itself. Damn.

Re: The most EXPENSIVE moped exhaust ever: Build thread

Whoa!, hold up on that thought! Its definitely very expensive but not 7K expensive.

Properly laid out I'm pretty sure the whole thing could be made out of a 3'x4' sheet or less, which would be 12- 12"x12" sections. So thats putting it at something like $3,912 according to that websites price of $326, which was also the only place I could find pricing that didn't require a quote. BUT, I'm pretty sure that price is extremely inflated over what we, or any company, can buy it for. I'm gonna try a bit harder next week to track down the price my company paid for the 601 Inconel sheet.

I know we get the Titanium tube for $33 a foot and the ferrule is around $90 (which I'm told we are getting a hella deal on)

If I ever get a decent estimate on the materials price I'll post it up, as for a price on the time I have into it, I dont even know really where to start, I'm just gonna leave that one alone.

Re: The most EXPENSIVE moped exhaust ever: Build thread

Mr diffley, do you not remember asking me this very question?

a whole year ago.

Re: The most EXPENSIVE moped exhaust ever: Build thread

^ hahah. i totally remember now!

Re: The most EXPENSIVE moped exhaust ever: Build thread

Lifted from that thread for context:

Nathan Kiehn Wrote:

-------------------------------------------------------

> no need to apologize I am happy to answer any

> questions. well the destroyer was based off of

> the mbk/peugeot doppler pipe. At the time I

> figured that with my limited resources there was

> no way for me to out engineer a pipe that was

> already out there. It's one thing to do the math

> and design a pipe using a program but there is no

> substitute for experience and time spent testing.

> Over time we found that it worked on

> many different setups. The destroyer has evolved

> slightly over time since I am always fine tuning

> my parts, trying to make each one better than the

> last.

Thanks for clearing that up Nathan, I hope you don't think I was saying anything bad about you or the destroyer, it was just an interesting realization.

All of what you wrote there is perfect and exactly my thoughts right now. It also helps me to answer another question people asked; I didn't try to design a chamber myself for exactly the same reasons you lay out there.

Kudos on making great products that people love, you make damn fine stuff from metal, by hand, and that is something I can really appreciate.

Re: The most EXPENSIVE moped exhaust ever: Build thread

the whole story goes back even further as to why I based the destroyer off of the doppler. reall old thread

and to the OP^^^ nice welds. making pipes takes way too much time.

Re: The most EXPENSIVE moped exhaust ever: Build thread

Ѭ ɞŦЯʚOluv Ѫѫ /

So how do I get one? Can we start farming this out to DNK labor camps yet? It should cut down on the cost.

I asked Jake for a destroyer and he wanted 2nd lien position on my mobile home.

Re: The most EXPENSIVE moped exhaust ever: Build thread

RADIUM CITY JO$HUA Wrote:

-------------------------------------------------------

> Side questions, what weld machine do you have that

> handles all of these crazy alloys? What hood do

> you use?

I use a Jackson Halo hood with a NexGen auto-darkening lens. The Halo hood is light and comfortable. Looking through most lenses has a green color to them, the nexgen lens has an amber color that looks better and gives awesome clarity.

These alloys don't really require any kind of special machine. I did all of this work with a TIG machine on DC-, a variable pedal, with the amperage set at 70 and no special pulse settings, just straight current. So any machine that can do that (pretty much any TIG machine in existence) could theoretically make these welds. Of course, some older machines and a lot of newer machines will just generally work better than others and thus make things a bit smoother and easier to do.

What alloys like this and pretty much any material requires for TIG welding is extremely clean work, that is always well gas covered. Abrasive clean all the surfaces to be welded, inside and out, scotch brite pads work good for that. Wipe down the area to be welded and your filler rod with acetone or other cleaner that will remove dirt and oil but evaporates and leaves no residue. With materials like Stainless, Inconel, and Titanium, gas coverage is extremely important. Always use a gas lens on the torch, seriously, if you are not using gas lenses you are really missing out. They also must be back purged, that means there must be gas on the back side of the weld too, if you dont do this, you are majorly fucking up the metal and may as well just make it out of mild steel.

I'm gonna stop there because I can really go on and on about this. Welding and fabrication is my passion, sometimes I cant shut up about it.

Re: The most EXPENSIVE moped exhaust ever: Build thread

When I put a little faith into the members of this community, people like you remove all doubt of assclown syndrome. Do you feel a little better now that the maker of Moto pipes is correcting you?

Based off of, not a duplicate you jackass.

Re: The most EXPENSIVE moped exhaust ever: Build thread

Thanks for the kind words Jake you have an impressive skill set. Keep up the good work!

Re: The most EXPENSIVE moped exhaust ever: Build thread

Ha! OK guy. Nothing you just said happened at all. I never said it was a duplicate nor meant any ill by what I did say. Nobody corrected me, an explanation was there, it was shown, and I understood. I really understood having built a pipe myself. It was all good, ya know, the way normal interaction and conversation should be.

I see that it is your internet job to be difficult and you are very good at it. At least you are good at something because I'm sure the rest of your life really sucks.

Re: The most EXPENSIVE moped exhaust ever: Build thread

^^^ that was for mr. army of one

bah, I shouldn't have even responded.

Anyway,

Thanks Nathan!

Re: The most EXPENSIVE moped exhaust ever: Build thread

Ѭ ɞŦЯʚOluv Ѫѫ /

Army of One Wrote:

-------------------------------------------------------

> Based off of, not a duplicate you jackass.

Re: The most EXPENSIVE moped exhaust ever: Build thread

Jason Jason Bobason /

As someone with a profession in the steel industry, I must say, that was porn. Good work, sir.

Re: The most EXPENSIVE moped exhaust ever: Build thread

I can't stop fucking cumming.

Re: The most EXPENSIVE moped exhaust ever: Build thread

weldwizard Jake Wrote:

-------------------------------------------------------

> RADIUM CITY JO$HUA Wrote:

> --------------------------------------------------

> -----

> > Side questions, what weld machine do you have

> that

> > handles all of these crazy alloys? What hood do

> > you use?

>

> I use a Jackson Halo hood with a NexGen

> auto-darkening lens. The Halo hood is light and

> comfortable. Looking through most lenses has a

> green color to them, the nexgen lens has an amber

> color that looks better and gives awesome

> clarity.

>

> These alloys don't really require any kind of

> special machine. I did all of this work with a TIG

> machine on DC-, a variable pedal, with the

> amperage set at 70 and no special pulse settings,

> just straight current. So any machine that can do

> that (pretty much any TIG machine in existence)

> could theoretically make these welds. Of course,

> some older machines and a lot of newer machines

> will just generally work better than others and

> thus make things a bit smoother and easier to do.

>

>

> What alloys like this and pretty much any material

> requires for TIG welding is extremely clean work,

> that is always well gas covered. Abrasive clean

> all the surfaces to be welded, inside and out,

> scotch brite pads work good for that. Wipe down

> the area to be welded and your filler rod with

> acetone or other cleaner that will remove dirt and

> oil but evaporates and leaves no residue. With

> materials like Stainless, Inconel, and Titanium,

> gas coverage is extremely important. Always use a

> gas lens on the torch, seriously, if you are not

> using gas lenses you are really missing out. They

> also must be back purged, that means there must be

> gas on the back side of the weld too, if you dont

> do this, you are majorly fucking up the metal and

> may as well just make it out of mild steel.

>

> I'm gonna stop there because I can really go on

> and on about this. Welding and fabrication is my

> passion, sometimes I cant shut up about it.

you ever see Brown Dog?

https://www.flickr.com/photos/browndogwelding/sets/72157626965718671/

so you just plug one end and back purge the other? no use of inert chamber or shit like that?

Re: The most EXPENSIVE moped exhaust ever: Build thread

It was a quick and poor calculation on one 12"x12" sheet per piece with sone added on for the muffler. Still would be very expensive either way. Good work for getting it for free.

Re: The most EXPENSIVE moped exhaust ever: Build thread

Gromosaurus Rex - Brad Pitt /

Scooter...the link suggests that iconel is good up to 2000F. Holy Shit !

Jake, props to you, Nate and others with the humility to recognize a good thing. There are plenty of cool looking, shitty performing pipes out there. As Nate said, calculating and fabricating a pipe is just one part of the equation. Why reinvent the wheel ? Tweaking and true-ing the wheel are good but there are few in the moped community that could let alone should reinvent it. Kinda like when people chop up motorcycle frames and do custom shit that they have no business messing with. Like they know more than the JDM engineers....lol

Again, nice work and thanks for sharing.

Re: The most EXPENSIVE moped exhaust ever: Build thread

this is amazing. you have such well planned out projects.

looking forward to seeing more of your work.

Re: The most EXPENSIVE moped exhaust ever: Build thread

interestingly enough i'm working with an inconel crucible for some glass stuff in the lab at this very momeny. it is about the size of a shot glass and cost 75 bucks.

Re: The most EXPENSIVE moped exhaust ever: Build thread

This is the most delightfully bonkers thing I've ever seen. Reminds me of pit cart I made out of expired carbon pre-preg. How often do you find inconel in the scrap bin? It could come in handy for a couple projects I had in mind...

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