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 Post subject: Re: How Are These Pipes Made?
PostPosted: Sat Jun 16, 2018 1:11 pm 
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Check out the carbon cover on the left side titanium pipe.

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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jun 27, 2018 10:44 am 
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How it's done.

https://m.youtube.com/watch?v=F0YRg1J9Vig


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jun 27, 2018 11:05 am 
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Does anyone have info or knowledge about using your hand to "feel" the exhaust output?

I always see 2-stroke mechanics holding their hand at the end of the pipes.

I assume they are "feeling" the temperature and pulse pressure, but not sure. Sometimes I see mechanics holding their hand there for 30 seconds or more.

What can be determined with this technique?


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jun 27, 2018 11:44 am 
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Location: Bay Area. CA.
Yep, Its a temp thing, Make sure its on all cylinders...


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jun 27, 2018 2:20 pm 
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Smoker wrote:
Check out the carbon cover on the left side titanium pipe.


I wonder what the point is? Support thinner metal? Hold heat in?


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jun 27, 2018 3:50 pm 
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It stopped people seeing the exhaust design, kept heat in, added some aero and eased minor knocks so the pipe stayed good in a minor spill.


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Sat Jun 30, 2018 1:42 pm 
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Simon Kvas, the dude in the above video, also made these RD500 pipes with Akraopovic silencers.

Bad news (for me), he lives in CZ.

https://m.youtube.com/watch?v=XcUfYUpBuPk&t=1s


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jul 11, 2018 8:43 am 
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How it's done.

https://m.youtube.com/watch?v=uxViZYNoqcA&t=25s


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jul 11, 2018 10:16 am 
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Titanium vs steel (From Simon Kvas):

As we all know, exhaust is very important component on two stroke engine. Two stroke exhaust is usually made of five components. Header, difusor, mid section, cone and stinger. Each of them has its own role. The most important thing is temperature inside exhaust. The bigger the temperature, the faster the exhaust gases. So for example if we make a exhaust of a certain length and compare it to a shorter exhaust. Engine with longer exhaust fitted will work on lower RPM then the one with shorter exhaust because temperature in it will be smaller, also the the gases will be slower. The same thing is with changing the exhast material. Titanium has a very weak thermal conductivity, smaller heat transfer coefficient and smaller thermal emissivity, compared to steel. The end result is the same as shortening the exhaust or to heat wrap it to achive higher RPM. I hope i was understandable enough. Take a look at the picture below to see the difference of one exhaust compared to the other. You guys can probably figure this out from a legend, but anyways.
Black curve - steel exhaust
Red curve - titanium exhaust

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 Post subject: Re: How Are These Pipes Made?
PostPosted: Wed Jul 11, 2018 11:48 am 
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...and stainless steel has similar thermal conductivity to titanium, although it increases with temperture whereas steel and titanium are fairly constant.
If you find a source for the Akropovic end cans I would like to hear, I contacted them directly and they replied through their Canadian distributor that they were specially made for Suter only. Perhaps he purchased them as spares from Suter.


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Thu Jul 12, 2018 12:24 pm 
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RuZty wrote:
If you find a source for the Akropovic end cans I would like to hear, I contacted them directly and they replied through their Canadian distributor that they were specially made for Suter only. Perhaps he purchased them as spares from Suter.

Akrapovic is in Slovenia.
Simon Kvas is in Slovenia.

I don't see them for sale to the general public.


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Thu Jul 12, 2018 9:41 pm 
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Smaller silencers on top.

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 Post subject: Re: How Are These Pipes Made?
PostPosted: Fri Jul 13, 2018 8:41 am 
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RuZty wrote:
...and stainless steel has similar thermal conductivity to titanium, although it increases with temperture whereas steel and titanium are fairly constant.
If you find a source for the Akropovic end cans I would like to hear, I contacted them directly and they replied through their Canadian distributor that they were specially made for Suter only. Perhaps he purchased them as spares from Suter.


I agree, if a source was found for those cans I would also be interested. Those look great!

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 Post subject: Re: How Are These Pipes Made?
PostPosted: Fri Jul 13, 2018 9:36 am 
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does anyone know the weight savings of titanium vs stainless pipes?
must be considerable compared to stock.


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 Post subject: Re: How Are These Pipes Made?
PostPosted: Fri Jul 13, 2018 10:35 am 
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I have a titanium upper pipe and one in stainless, I will put them both on a scale in the next few days. I would guess the savings for a full set of pipes is probably 2 kg, but alot more vs. stock pipes of course.


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