Seems like North Americans like to use Mandrel Bent Piping for their exhausts and Japanese weld together sections of pipe to make the bend (seen in following picture).

I would have searched but I have absolutely no idea what this type of exhaust piping is called.

What I would really like to know is WHY it seems to be preferred by JDM tuners & companies over Mandrel Bends....


(Stolen from the ITR forum, thnx kengs )

 

Because it looks hard.

 

because they like all kinds of welding slage in there exaust piping??

 

Depends on the material, you often see the layer piping on very light titanium exhausts. I believe this is because the piping just cant take the stress of being mandrel bent because of the gauge of the titanium piping.

Most US produced exhausts are A. Cheaper B. No where near the lightness of a full Ti tuning house setup. On the S2000 you can lift the dual amuse titanium kit with your small finger. (Have to dig up pics.) Then again the prices start around 2.3K and go up from there for that setup.

 

Yep, it can't be bent, so they cut out angles of straight and make bends like that

 

thanks!!
now my curiousity has been fed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">Yep, it can't be bent</TD></TR></TABLE>

I beg to differ: http://www.burnsstainless.com/....html

To answer the original question, I can only think of two things. 1.)titanium bends are so expensive, it is more cost effective to cut and weld straight tubing (2) everybody loves the discolored ti color for whatever reason.

I know they have better metal in Japan, so I don't know if what I said about the price of the bends is 100% true.

 

so they can charge 3x more since its "jdm"

 

Maybe the welds cause miniture venturi effects

So that even though its hitting a bend and slowing down the slight compression-expansion-compression of the wave cause it to speed up, thus negating any velocity loss

<FONT SIZE="8">Oh Yea</FONT>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 743 &raquo;</TD></TR><TR><TD CLASS="quote">

I beg to differ: http://www.burnsstainless.com/....html

To answer the original question, I can only think of two things. 1.)titanium bends are so expensive, it is more cost effective to cut and weld straight tubing (2) everybody loves the discolored ti color for whatever reason.

I know they have better metal in Japan, so I don't know if what I said about the price of the bends is 100% true.</TD></TR></TABLE>


Notice how the internal piping diameter only goes up to 2 inches and the that the wall thinckness is larger then most JDM tuning houses use, well at least on that page. There are of course tradeoff's when you are working with a material like this.

Personally I think they do this to justify the proce of the exhaust's. If anybody could make a madrel bent ti exhaust for cheap then they have to make themselfs stand out from the crowd by doing somthing special.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">USDM piping vs. JDM piping, why the difference?</TD></TR></TABLE>

About $500.

 

would bending the pipe cause it to thin out compared to doing what they do? would that be a bad thing...im just wondering myself, and that is the only thing i can think of, and im sure that doesnt make any sense...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 743 &raquo;</TD></TR><TR><TD CLASS="quote">
I know they have better metal in Japan, so I don't know if what I said about the price of the bends is 100% true.</TD></TR></TABLE>


And just where might they get this magical JDM metal? That's just bullshit. Anything they have there we have here.

It has nothing to do with JDM and USDM, the titanium can't be mandrel bent. That is the only reason it is welded like that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Z &raquo;</TD></TR><TR><TD CLASS="quote">
And just where might they get this magical JDM metal? That's just bullshit. Anything they have there we have here.

It has nothing to do with JDM and USDM, the titanium can't be mandrel bent. That is the only reason it is welded like that. </TD></TR></TABLE>

Wow I agree with Z.

The end is near...

Their exhausts *MAY* use better metals (I'm not even sure about that) but any metals they get we have here.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Z &raquo;</TD></TR><TR><TD CLASS="quote">And just where might they get this magical JDM metal? That's just bullshit. Anything they have there we have here.

It has nothing to do with JDM and USDM, the titanium can't be mandrel bent. That is the only reason it is welded like that. </TD></TR></TABLE>


Yep, right on and where you think japan get all the metal from?

they paid us to buy car from junk yard so they can reuse the metal, why? because they dont get no raw material so much for jdm metal ..

Just for the kicks, Neuspeed fab. up a titanium pipe for their project rsx if I am not mistaken.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JMS JT &raquo;</TD></TR><TR><TD CLASS="quote">

Wow I agree with Z.

The end is near...

Their exhausts *MAY* use better metals (I'm not even sure about that) but any metals they get we have here.</TD></TR></TABLE>


The end is most definitely near. btw, finally saw the Mino vs Sapp fight. Sapp is a freaking monster.

Back on topic now, Where can I buy some magical JDM metal?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Z &raquo;</TD></TR><TR><TD CLASS="quote">The end is most definitely near. btw, finally saw the Mino vs Sapp fight. Sapp is a freaking monster.

Back on topic now, Where can I buy some magical JDM metal? </TD></TR></TABLE>

That must be in AD&D edition 5.

UFC event is on 1/31/04 btw. Oh yeah, remember the discussion about paramilitary vs UFC? You know CroCop right? He was a paramilitary member in the Crotian Military.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JMS JT &raquo;</TD></TR><TR><TD CLASS="quote">

That must be in AD&D edition 5.

UFC event is on 1/31/04 btw. Oh yeah, remember the discussion about paramilitary vs UFC? You know CroCop right? He was a paramilitary member in the Crotian Military.</TD></TR></TABLE>

Is this the Coutour vs Belfort fight that is coming up? I do know who CroCop is, I didn't know that about him though.

 

I think it looks shitty - like a giant earthworm.

And I think the discolored metal (be it titanium, nickel or SS) looks shitty too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evil Drew M &raquo;</TD></TR><TR><TD CLASS="quote">I think it looks shitty - like a giant earthworm.

And I think the discolored metal (be it titanium, nickel or SS) looks shitty too.

</TD></TR></TABLE>

I agree. I'll take a nice uniform color mandrel bent pipe, thanks.

 

UFC 46
Randy Couture vs Vitor Belfort
Matt Hughes vs BJ Penn
Frank Mir vs Wes Sims
etc.

Yes, that's the one. Will be a good one.

back to the thread, sorry.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Z &raquo;</TD></TR><TR><TD CLASS="quote">

I agree. I'll take a nice uniform color mandrel bent pipe, thanks. </TD></TR></TABLE>

You ever sell that JDM turd you had?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JstChilln120 &raquo;</TD></TR><TR><TD CLASS="quote">

You ever sell that JDM turd you had? </TD></TR></TABLE>

Nope, but now that you mention it, it may just be up for sale again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Z &raquo;</TD></TR><TR><TD CLASS="quote">

Nope, but now that you mention it, it may just be up for sale again. </TD></TR></TABLE>

&lt;cough&gt; appearance forum &lt;cough&gt;

 

those are some pretty welds ....i do admit that ...