Originally Posted by
mk1 rob
Also if you have the time try to round off the lip on the valves at the edges of the seat area. I find this can add almost as much power as the headwork itself. I put valves in a pillar drill which makes it nice and simple.
Rob
ive heard of 3 angle valve seats obviously but never heard of that before. makes sense to do it but do you really believe it makes a noticable difference? im planning on doing some DIY porting to a 1.7 puma head of mine, only mild stuff, but would it really be worth doing that? what about machining down the stems slightly at the same time? worth doing?