v8eaterbeater
Banned
i was wondering what is a 3 and 5 angle valve job, and what is done to the head when it is done? sorry if it is astupid question and is it worth doing to my head with cams and springs. thanks
about 3 and five angle valve jobs
- Thread starter v8eaterbeater
- Start date
First off, what motor do you have? The three and the five refer to the number of angle cuts that are made to the valve. With the bottom cut, a transition cut (between the bottom) and a valve seat cut. The valve seat cut ensures greater / better seal between to the valve seat and face, while the other two cuts (in a 3 angle valve job) smooth / quicken airflow. Mind you, angle valve jobs in and of itself don't produce the greatest gains unless it's mated with new valves. Swirled stainless valves (over stock valves) also increase airflow as they are smoother than stock units. Typically, valve jobs are performed on high performance, competition spec motors. On a daily driven stocker (non-forced induction / non-high compression) I don't think the cost justifies it.