Quote:
Originally Posted by NESW20
they basically do the same thing: allow for different intake flow characteristics for different RPM's. both allow for a more "normal" low RPM torque curve, and then allow for better-breathing high-RPM operation. more torque and more power.  different ways to achieve the effect, but still going after the same thing.
-Mike |
Don't forget to include Subaru's TGV (Tumble Generator Valves) and their camshaft phasing technology.
Just like TVIS, TGV gets ripped out to make big power. Let's hope the new car doesn't have it.
I like the boxer rumble, but I'd give it up to make power. BTW, the best sounding engines have an offbeat rumble (Harley Davidson) or have a whole bunch of cylinders (Ferrari V12).
Going back to the original post...did anybody understand the part about the intake runners? It sounded like the engine might use both long and short intake runners. That's sort of like TVIS, but each runner would feed both intake valves instead of switching between one valve (swirl) and both valves (tumble).
EDIT: I just re-read it and I think he confused me by using the word "runner" instead of "primary". Runner is an intake manifold term.