Whats the diffrence?

[hunterguy86]

Hey I know this is a stupid newbie question. However Im trying to learn all I can. So what is the diffrence between a roller cam and a flat tappet cam? And whats the diffrence between roller rocker arms and regular rockers?

Sorry this is dumb but please enlighten me.

 

[sweetk30]

regular scuffs against the lobs or valve tip. rollers roll on a bearing over the lobes or valve tips. rollers offer less friction and wear on items. and also give free hp to motor and rev just a bit faster.

 

[pauly383]

The lifters on a flat tappett are normal looking lifters , flat on the bottom where the cam touches it . Lifters on a roller cam have rollers on the bottom where cam touches it .

Rockers are stamped steel stock , and its metal to metal on teh fulcrum point and valve stem tip .

Cheap roller rockers are still stamped steel in the fulcrum point , but roller tip on the valve stem , creates less friction .

Real roller rockers have a roller fulcrum , roller tip , and vrtually no friction .
Which makes some power , is closer to its rated ratio than stamped steel , and lasts longer