Okay, well I wasn't able to get my discussion today with the shop, but we have had some email discussions.
Basically, we want to use the valve train parts that we use in the Fireball. Beehive springs, Fireball spring retainers, etc.
But it will need to use new valves which are appropriate for the UCE. These valves will be specified to have a slightly larger diameter head for the intake, like the Fireball, which will allow the port profile in the bowl which we want to have. The valve stems will be a length which we will specify to ensure that the rocker/valve wipe geometry is correct, without any excessive side-thrust which might cause the early valve guide wear which has been seen in some UCE bikes. We will make sure this is correct in our modified heads, so that will not be a potential issue with our stuff.
We will address the valve lift issue. How we will actually do that is still undecided. Both cam and rocker modifications are under consideration. The final valve lift figure will depend on the port flow behavior at various valve lift heights. Our valve spring configuration allows a max lift of up to .500", if we should desire to go that high.
The exhaust cam auto-decompressor will be retained to protect the sprag.
We will be making an oversize piston for this system. The bore size is yet undecided, but it will be at least one overbore size bigger than stock, so that we can bore/hone correctly for the new piston. If we feel we need the bigger bore to load up the port demand higher for flow, we will size for that.
The piston crown will be set to achieve squish/quench with this chamber shape properly. Compression will "gingerly" be moved up as far as we can get it, while still keeping the ECU working for us without pinging.
The valve relief pockets in the crown will be deep enough to deal with whatever lift height we decide upon for the valves.
Hopefully the Power Commander bugs can be worked out, so we have some more freedom to move the rpm limits higher. We'll see how that comes along.