OK, so those titanium valves do look good and probably work good too..

I agree, strength quite often means more weight which can be counterproductive when you are chasing a few extra revs..

I am going to be looking at titanium valves, pushrods, collets when my money tree finally matures and starts to fruit..

Chuck some fruit my way.

To increase speed (or revs/rev-response for that matter) add lightness

You can get completely hollow valves too, not sure how much though.

LOL 'completely hollow valves' sounds like they're made of nothing. Sorry I meant hollow stem and or hollow valve head.

rally1200 where are the valves from?
I would like a set of 44mm inlets and 38mm exhausts for my ca20e head.
The valve springs Im looking for smaller diameter double valve springs
so I can get away with more angle/height by machining the port higher.
The rocker arms are alloy already but I wouldnt mind using mazda or
ford roller tipped ones modded to fit.