OR, you can set the injection timing to the n/a spec and end up with better flow and reduced pumping losses.Andrew
And I bought a new head because the shop told me it was toast since one of mine would fall out? :evil: Guess I have a spare head now.
Peen the edge in 3 places.
Remove pre cup, take center punch and make a mark on the inside of the head where the pre cup sits, hit the side of the area where the precup is supose to sit against. Do this on at least 3 opposing angles and then the precup will need to be taped in place to get it in. Another term would be swedging. What your doing is deforming the metal in small areas around the precup so the deformed (swedged) metal will cause friction on the sides of the precup. This is inside the head not on the out side/ cumbustion chamber area. Although that may work as well.Does that make sense at all?dan