rave valve is something more mechanical
if i m not wrong, i think someone told me before RC valves is open on a progrssive basis, the more u drag, the more it open
rave valve one shot open full..
thats y the surge u get on rave valves will be stronger on RC valves,kawa integrated powervalve or YPVS
but then on the contrast the RAVE valve is the hardest to maintain,
my friend TZR 2 yrs neber wash valve, still work fine, my rave valve mus decarbonise once a month...
as i mentioned again, this is based on wad i heard abt rc valves
and from wad i know abt my rave valve

i not sure also !!!