let me just make it simple for you guys

3.3 is the bestest engine ever
2.5r is 2nd bestest engine ever
.18tm sucks monkey testicals
.18tz is a .18tm wannabe
4.6 could possibly rule
plus 21-5 is iffy during break in stage
picco .21 DI rules
k&b .18 sucks
sirio .18 is sweet
fantom .18 is groovy
hpi .16 (lsp stock motor) sucks