Inconel is a trade name for nickel based alloy, much like Panadol is trade name for acetaminophen. There are might millions of inconel turbine wheels for diesel.. but not for gasoline engine it is still very relatively rare.
It doesn't make much of a difference in rotating assembling, but it makes a lot of difference in complexity and reliability.. also the final system weight.. eg you don't need a wastegate and a more compact packinging... things that Porsche cares.
To make spool faster is the lower the PSI.. make the whole thing smaller.. yes it has nothing to do with the nickel, but if you look again what I wrote, I didn't say that.
Which other turbo that can handle 2000F as you mention that is commercially available and for gasoline engine?
Quote:
Originally Posted by sdubfid  You stated inconel was lighter and spools quicker which is not true. Then you changed it to nickel. It's nothing special, there are millions of vehicles with inconel turbine wheels. Mechanical or electronic vgt actuation makes no difference on the rotating assembly weight. The only difference mechanical or electrical will have is on spool time is because the electronics will allow more parameters for feedback for better tuning.
I am not sure what the testing requirements are for gasoline vgt systems like on that 997 but I have seen diesel vgt turbos operate on the test stand at work over 2000F. |
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