Max lift on Vitz valve lifters

[Bean]

pretty much all said already. but to sum it up again in stages.

all stock parts will limit lift to about 8.5mm due to th springs binding

better springs, rest stock will limit lift to about 9-9.5mm due to risk of the cam grabing the shim and leading to disaster.

better springs and solid lifters: lift will be limited by the head design due to the cam hitting the casting around the lifter hole.

if you change all the above accordingly you can go all the way up to around 13mm of lift

I run springs and solid lifters from the yaris (1SZ-FE) with 9.5mm lift - might switch to 11mm once I get it dynoed if there is enough room in the rev range left.

PS: If you go with the yaris lifters I have a set of the thinnest ones (8 pieces) to use for measurement so you can order the right size. You'd have to pay for postage back and forth.