Quote:
Originally Posted by oil pan 4
I didn't need an STS system to add my turbo.
Since the turbocharger is a heat engine why would I want to remove it from its heat source?
That is what I have and yes they do it better.
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Turbos use drive pressure... more heat means more drive pressure but they still function normally. You just need to use a properly matched housing.
Its easier... also the air density is greater from an sts system so it compensates for the lower thermal energy at the turbine. Plus heat isn't in your engine bay.
Biggest problem is sending turbo oil back via scavenging pump.
Also in regards to BMW... they use rather small turbos capable of boost under 2k rpm stock. I'd bet they keep their waste gate open at cruise to help their mismatched turbine housing.
When I went compound turbo on my CTD... I gained another mpg and lost absolutely nothing at high altitude... but a hundred spool rpm