Just curious if im using Surge and have a hextect revolver ( Unique passive: +12% spell vamp). When spell vamp procs does this mean much more health returned to me?

"Spell vamp is calculated from the damage dealt to the enemy after reductions such as magic resistance, armor or effects like Unbreakable Will."

Wouldnt this make surge more viable?

yes the bonus ability power would slightly increase your hp gained but not much with most ap ratios.
surge works best on hybrid damage champions like akali and jax, due to 35% AS buff and AP buff
in fact i prefer it to ignite on akali due to her passive.