The rocker ratio option sounds like a very good idea. I may very well try that if I switch out the heads. I could go ahead and find me a set of 1.6 ratio and set the heads up with them. I have always thought this was an expensive option based on what I have seen, but I was always looking at roller rockers when I looked at this. Since my cam is a solid lift I would have to find the right set. I have seen ugly reviews of some of the sets vs others. Some like the Harland Sharp seem to be preferred, but they can get pricey. I will start to keep my eye out for a set.
How much does your cam specs change when you go from 1.5 to 1.6?
the duration does not change substantially.....maybe 2 degrees longer? I don´t know for sure. It´s the increase in lift that gives more power. If you wanna know your lift number with 1.6 Rockers, take the 1.5 ratio number, divide by 1.5, then multiply by 1.6. Or use the lobe lift multiplied by 1.6.
Michael
