3 angle or 5 angle, plus porting questions.
3 angle or 5 angle, plus porting questions. whats up guys, i have a extra set of 317s im setting up, going to do a valve job, i know a 5 angle should be better then a 3, what are everyones thoughts on this, also we are learning how to port in my machining class, on the 317s there is a small ridge at the top of the head(intake side), ive heard its part of the cooling jacket, does anyone know if thats true? thanks.
whats up guys, i have a extra set of 317s im setting up, going to do a valve job, i know a 5 angle should be better then a 3, what are everyones thoughts on this, also we are learning how to port in my machining class, on the 317s there is a small ridge at the top of the head(intake side), ive heard its part of the cooling jacket, does anyone know if thats true? thanks.
The "ridge" you're talking about, I think might be for the rocker bolt. If that's the case, it's okay to break through, but be sure to use a thread sealer on the intake rocker arm bolts instead of anti-sieze or loctite. Just be careful not to get too thin underneath the rocker arm and spring pocket. People have learned the hard way how bad that can be when the ceiling of the port rips off.
