P.J.S.

prototyping a mild steel test unit and dyno testing already in the works on another local rs

initial results are promising

:-)

silverboy

GT1studio, what is the diameter of the pipes in the exhaust manifold vs stock?

GT1Studio

Not sure what the stock one measures.
The race manifold is made of 2" Tubing. The exit of the collector is 3" all the way to the Muffler and out. Tips are 3 1/4"

Carrera GT

I think if there's a way to add in the cats and "back" O2 sensor, as mentioned in this thread, this system would be more "applicable" to street cars.

GT1Studio

The system has been designed this way. Adding a cat will not give any advantage to it. It would add weight and take power from it. This is for the person building a track car and does not mind having the sound of a true Porsche race car when driving the streets.

911SLOW

IMO if not for RSR homologation purposes of exhaust (if any) there is no need to spend that much money to buy this setup for a street car when you can have a similar system for far less money in any of the top quality tuners in the market today.

John

Carrera GT

I think US$10K is not unrealistic for a factory set in Inconel. If anything, I think this makes the Akro and Tubi stuff in Ti look a tad expensive.

For someone wanting this on a street car, just realize the implications of requiring cats and a secondary "after" O2 sensor point -- otherwise the factory electronics will need to be convinced to disregard the absence of a cat. Much easier to just clamp some efficient cats in there.

mobonic

piece of beauty!

Guest89

What's the benefit of Inconel vs Ti?

Carrera GT

For an authoritative answer, you'd be far better off Googling "Inconel" or the vendor site mentioned above perhaps.

At a conversation level of understanding, I can say it's used in extreme heat stress applications (race exhausts, engine and turbo bearing surfaces, etc.) It's a difficult material for fabrication, so you won't see it in everyday applications, but exhaust systems and cylinder linings are typical products.

I've read that the heat conduction properties make it especially good in sophisticated engineering applications like getting hot exhaust gases to flow without interruption due to the wall of the tubing having radical temperature variations.

In short, it's awesome. $10K awesome. : )

winkingchef

Comment of the month.
/agree

911SLOW

Inconel is a special alloy that shows better heat withstanding behaviour than other types of steel, but cracks and its very difficult to weld.
The disadvantage is that is heavier than Titanium (which also is prone to cracking).
On a street track car you dont need it unless you aim to race the next 24h event near you.
IMO With less money you buy a well made inox exhaust which will outlast you and the car.

John

edit : at least the Ti is lighter so you gain something with the inconel you gain the pleasure of having an RSR part in your car that new costs as much as small car.

GT1Studio

If Ti was a better alloy for fabricating exhaust systems my question is why is everyone using Inconel. From F1, nascar, wrc, dtm, alms, indy, grand am........

Jon70

McLaren is offering an iconel exhaust as an option on the new MP4-12C.

ritzblitz

Another thing about inconel is the corrosion resistance. You could throw this in the atlantic for 100 years and it would probably come out looking shiny...

Also http://www.bulletproofautomotive.com...il.php?ID=3833