Well my friend is all bragging about his engine being boared out .50 over and that its alot better than stock or .20, whats the difference and what is better or worse?

 

Sounds like there mixing inches and millimeters.Usually its .020" which equals .5mm. Because 1mm equals .0395".

 

The more u bore the thinner the sleeve. if you only have to bore .20 over then do it. If something were to happen and u already bored it out .50 thou then ur boring it out thinner and thinner. And we all know what happens to thin things

 

i dont know, what happens to thin things or what? Ive never experienced with thin things, all I have is wide like my...skateboard

 

Well if you are going to boost it the walls that are thin usualy break, Like a thin piece of wood