I know a little about this, but you know what they say about a little knowledge......

whats the difference between a .48, .55, .60 exhaust housing? is it smaller number = less lag but less top end power?

size of the compressor wheel effects what?

Trim? whats the differencebetween 52 or 56 trim in the turbos performance?

I assume the compressor maps require the flow rate of a head and the required pressure and you work off of an area of the map.

If anyone can explain some of this SIMPLY I would be thankfull.