Quote:
Originally Posted by OrbitalEllipses
I wouldn't say there are PLENTY of people using them, but there is more than one manufacturer producing carbon or aluminum one piece driveshafts in the Subaru world. I don't really think it has anything to do with NA vs. FI though, as response is response no matter how you feed air into the engine.
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But lack of inertia has negative effects too, most notable in an FI application (RPM drop when up shifting increases time for boost to build). Also lower inertia is harder on starters and makes 1st gear launches trickier. Not a big deal for a track only car, but some of that can be a PITA for a DD. A one-piece drive shaft will also make for more NVH since it looks like part of the coupler is a harmonic damper.