Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
For reference, I got a quote for alle rocker arms + cam shaft for £420 all in all. That is quite a bit cheaper than buying new. Now I just gotta figure out how to ship into the country. Don't know what changed since Britain left in regards to shipping into the country, but it would seem that I could still save a lot by going this route.Unless someone has a cam shaft and rocker arms they wanna sell me?
Phil, just say you want 5 degrees more overlap and 10 degrees more duration and let them worry about it. It's the way the lobes are profiled, overlap is the time both valves are open at the same time, duration is the time the camshaft holds the valve open. According to Mark it really wakes up the 500/550 engine, there are other little things you can do like making a pocket above the inlet valve, they always say "Don't lower the floor, raise the roof", and raise the exhaust ports about 2-3mm and smooth the port out. That's to aid the flow of exhaust gases as they exit the engine.