seals would be good if it was modified to overhead cam with buckets of oil sploshing about, just saying
Hi Berger,
There should be lots of oil sloshing about in the A7/A10 rocker box as its mostly a splash system. The rocker and valve tips need to have quite a lot of oil for lubrication as do the valve stems.
The rocker shafts are well lubricated via the rocker feed so they are OK. However, Air cooled engines because of the higher temperatures they run at, generally require larger running clearances including valve guides than water cooled engines.
If we are able to decrease valve guide clearances and still provide adequate lubrication we have the advantage of dissipating heat from the guides quicker and therefore more efficiently from the engine.
There are also several more advantages in using valve guide seals as outlined in my previous post to Neil.
As regards converting to OHC it's on my project list and i have some parts gathered already. Got a crank from Draganfly yesterday.