Karl, I'm not a supporter of looking at timing maps and analysing them. It depends on alot of different factors, which is why I say that 'live' is the only way. It's not snobbery, I hope it doesn't come across that way.

I've only had ONE engine failure in 10 years and that was when I fitted a Cometic head gasket, since going back to standard, it's been fine. Even then, that was only a head gasket failure. Remember my car is tuned 100% on the dyno and used for top speed.