Max lift on Vitz valve lifters

[jondee86]

From what I can see on the interwebs, the total height of the shimless
bucket is about the same as the bucket with shim. It also appears that
the thickness of the shimless and the bucket plus shim are similar. So
in theory at least, the maximum lift with either type should be much the
same. But unfortunately, I don't have buckets available for measuring.

Lighter weight will be helpful for higher rpm's, and no loose shim is good
for higher lift above 8.5mm or so. If you go above 10mm lift I believe
you have to notch the head for clearance. Plus you will need TRD or
similar springs, and you will need to check when coil bind occurs.

There is very little reliable information on exactly how much lift you can
get with any particular combination, and apparently there can be small
variations in dimensions between heads. Not much help I know, but if
you plan on pushing the limits for a 4AGE, you are going to have to get
hold of a sample Vitz bucket and do the measuring for yourself. That way
you can be sure it's going to work

Cheers... jondee86