hi
have a few questions about cams. i have a silvertop 20v in my ae86 btw

#1 is genrally the rule of thumb the bigger the cam the more it needs to rev to make its power?

#2 how much do cams go for genrally and do they come up for sale 2nd hand that often?

#3 do all cams sacrafise power somewhere to make more power somewhere else in the rev range?

#4 is this the next mod i should be doing to make more hp considering i have a silvertop runing off a mircotech?
looking forward to see what u guys have to say.,..