help with rach concerto 2-2

[toomuchrice]

in the middle part of the second movement where the right hand has a very very long continuation of sixteenth notes and the left hand has periodic eight note chords.  could i please get some advice on how to perfect the parts where it uses the fingering 4-5-4-5-4-5-4 faster and clearer?  

[Motrax]

This probably belongs in the repertoire section (just so next time you know. )

Remember that clearer is faster - clarity makes people's brain have to process each note distinctly, so it makes it harder to follow and thus seems faster (that's my pseudoscience explanation, I'm sure someone else could explain it better).

But to answer your question...

You have two options here - keep the suggested fingering, and practice your butt off building 4-5 finger strength and control (I recommend Dohnanyi excercises, they are quite golden), or you can switch fingers.  If you don't have Dohnanyi excercises, use the search function for "Dohnanyi" and you'll find one or two great topics about them.

Use 4-5-3-4-3-4, or 4-5-2-3-2-3 (this is a big switch and may really mess you up playing fast, but it won't hurt to try out if you find it comfortable). Remember that fingerings are always "suggested." Usually there is a reason behind suggested fingerings, but everyone's hands are different, so deviating from what's printed is no problem.

Good luck!

[Medtner]

Instead of the Dohnanyi (which can drive you insane at one point, and doesn't teach you repertoire), you can instead learn Chopin's 25-6 Thirds, that'll not only get your fingers working on the motion but you get thirds out of it, plus repertoire you can play. In my book, that's 3x better than the Dohnanyi.
Actually the 4-5 fingers should have had a lot of training in trilling since they get a lot of it. I would think that if you're working on this piece you're up for it, or just work on some repertoire that prepares you better for the piece.
What I believe is tougher than the section you mention is the upcoming tremolo played at fortissimo, true you use both hands, but their interweaved and I think the challenge is greater. I've seen it executed so amazingly well I'm never satisfied with how I do it...