Mechanical Rocker Arm Ratios...

the single best thing you can do for any adjustable rocker arm that's shaft mounted and has no roller bearings is banana groove the shafts. I'm using a set of Harlan sharps that have to be at least 30 years old. they for the most part operated solid flat tappet cams but I have them in my supercharged motor and the spring pressure on the seat is 360psi and they never have any issues. so with that being said I feel they are one of the best arms on the market. I've never had any rocker arms other than 1.5's so I can't say anything about the other ratios but you could only conclude that with more ratio the cam would make more power. stock rocker have the ratio all over the place and most of the time it's a lot less than 1.5 and have no place in a performance build especially with the way the prices have come down. if you use rockers with roller bearings that ride on the shaft the shaft needs to be harden so the bearings don't eat it up.