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#1
04-23-2002, 08:45 PM
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who is interested in titanium exhaust?
ok... here is the deal...
my friend owns an aerospace products company, and he has access to high grade stainless and titanium... he is interested in making exhausts out of titanium for alot of applications... here is the low down... hydroformed muffler with no packing, it uses a baffle inside, similar to corsa i will be running one of these shortly, he is making mine this week... what he is looking for is what kind of cars would be the best to target, and what kind of price range people are looking at... on price consider that you'll never have to replace it, it wont rattle...all that good stuff... also... if it is more expensive than a company on the market (you pick) would you buy it if it were lighter, lasted forever and made similar/more power? these are the things he is looking for to gauge interest... please email me with any opinions.... thanks [email protected] (also... if this is in the wrong forum, please move it to where it will be seen by the most people... thanks) 
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#2
04-25-2002, 08:46 PM
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Not to nitpick or anything, but good exhausts don't make power (none do), they only minimize power loss.
And they won't rattle? Doesn't that depend on things other than the material itself?
__________________
Some things are impossible, people say. Yet after these things happen, the very same people say that it was inevitable.
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#3
04-26-2002, 04:08 AM
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I'm assuming this a pretty much straight-through design? If it equals other low backpressure exhausts and is several pounds lighter, you may have something. What grade of Ti is he using? You said he ran an aerospace company, so I'm guessing aero grade? That would be 6% aluminum, 4% vanadium; or 6% aluminum, 6% vanadium, and 2% tin - I think that's right. That stuff is rather expensive as I understand it. The people who flock to titanium are going to be the ultra high performance crowd looking to shave off a few pounds wherever possible. For this reason, he might be better off doing full cat-back systems, or just pipe sections.
I'll tell you what I might be interested in. If he made some mandrel-bent joints and inlet sections for welding together turbo manifolds, he could probably peak the interest of a few builders. Making sections would probably be better since he would be limiting applications significantly by making whole manifolds. He could sell the pipe sections to shops that make manifolds, and I guarantee you the shops would find a good way to market them. It would be nice to have a true alternative to cast iron manifolds (tubular aluminum does not work. I'm not sure if ExtrudeHone does titanium, though, since it's a bit harder than other materials they work with. Ti exhausts seem to be most popular on high performance import motorcycles. That would be a good start. Only problem there might be all the new variable exhaust systems they're fitting on those. Hmmm... I don't really give answers, do I? I just come up with more questions... :smoker2:
__________________
"There are no substitutions for revolutions."
Member of AF's Slide Squad (Member #05)
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#4
04-26-2002, 09:32 PM
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IIRC, HKS made a 4" titanium exhaust for the Supra.
__________________
Some things are impossible, people say. Yet after these things happen, the very same people say that it was inevitable.
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#5
04-27-2002, 02:56 AM
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Top Secret makes Ti exhausts for the Skyline, Supra, S2000, and Integra Type R, plus a few other cars I believe. I think the 1000 hp RB26DETT-powered Supra that Kuzihiko Nagata drove on the A1M had one of these. If not, it was the one at the Tokyo Auto Salon.
HKS also made a complete Ti exhaust for the 3rd gen RX-7s. You see the trend? High performance Japanese cars. It might be a good idea to offer them for the 2nd gen Pulsar NX, too. I know somebody would buy it. :smoker2:
__________________
"There are no substitutions for revolutions."
Member of AF's Slide Squad (Member #05)
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#7
04-27-2002, 02:34 PM
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the reason an exh rattles is directly related to materials etc...
i'll find the grade, but it is really nice... the only reason i am only getting a muffler right now is b/c that is really easy to make as a guinea pig for sound/performance etc... and he isnt looking just at cars, he is looking at bikes, planes,etc... but he is looking at making full cat backs... and on the too expensive trip... if it is worth it, people will buy it... ti exhausts wouldnt be around if people didnt buy them... if ti is too expensive though, he has access to every grade of s/s out there as well... there are lots of options... but thanks for the replies... the other board i posted on almost ate me alive
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#8
04-27-2002, 08:33 PM
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Quote:
Quote:
__________________
Some things are impossible, people say. Yet after these things happen, the very same people say that it was inevitable.
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#9
04-30-2002, 12:01 PM
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packing material and welded parts tend to loosen and rattle.
if there is a baffle that is formed into the muffler (not all one piece, but basically, the insert and tube are put together and hydroformed into the shape of the canister together) then there would be no rattle... a hydroformed muffler/exh has no welds... the ti is high qual in its properties... the finish is going to be a mirror polish... unless other wise specified... i most likely will have a satin finish on mine...
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#10
04-30-2002, 07:05 PM
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Quote:
__________________
Some things are impossible, people say. Yet after these things happen, the very same people say that it was inevitable.
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#11
04-30-2002, 07:06 PM
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Quote:
__________________
Some things are impossible, people say. Yet after these things happen, the very same people say that it was inevitable.
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#12
05-01-2002, 10:55 AM
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welds tend to break down.
my point is that there are no welds in the muffler, so there will never be that problem... it has nothing to do with ti, the s/s stuff will be hydroformed as well
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#13
05-01-2002, 05:03 PM
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Quote:
Quote:
__________________
Some things are impossible, people say. Yet after these things happen, the very same people say that it was inevitable.
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#15
05-02-2002, 10:45 AM
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Titanium does come in many diffrent grades (rated from 1 an up), many of them are used in aeroplane constructions. An good overall titanium alloy is grade 5 (used in SR-71 Blackbird as one exampel), high strength (around 800 MPa in room temperature) but it can never break stainless in the module of elasticy, but it doesn't need to do that since it is so light (around 4,5 g/cm^3). Titanium also have good corrosion resistance and a relativly high melting point.
As a material for turboengine manifolds I would rather consider a "superalloy" like Inconel or Nimonic. The turbos turbinewheel us usually made in Inconel, and this material is specially good in high temperatures but sadly it's expensive, tubular inconel in dimensions for turbo pipes cost around $300 /m.
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