Thread: Opinions wanted.

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Your headline says opinions wanted. OK, here are mine....
1. Stamped steel rockers can be all over the board as far as ratio. It might not be unusual to find a 1.5 ratio rocker that actually measured 1.45.
2. It makes sense that friction, and thus oil temperatures, will be reduced with roller bearings instead of a sliding ball/socket arrangement. Further, it makes sense that some additional hp would be unleashed. Reduced friction at the rocker should also be a little easier on the lifter/lobe interface.
3. Roller rockers will not last as long as stamped steel rockers due to being more fragile in their construction.
4. In a day and time when we should be considering less pressure at the lifter/lobe interface of a flat tappet design, you have chosen the worst possible lobe profile, a high energy grind. Doing the math, you will find only 22 degrees difference between seat to seat duration and 0.050" duration on the opening and closing ramps of the grind you have chosen. This is right at the limit of lifter rise per degrees of rotation and seems to me to be the wrong way to go unless you are trying to make max hp in a racing class that is limited to a hydraulic flat tappet cam. While this profile will get the valve open and closed quicker than a less violent grind, it also imparts maximum pressure on the lifter/lobe in a time when extreme pressure lubricants have been eliminated from off-the-shelf motor oils. The only way you could make this worse is to increase the pressure at the lifter/lobe with 1.6 rocker arms. In my opinion, anyone who isn't willing to spend 500 bucks for a retro-fit roller cam hasn't thought all of this through.
5. Here's a list of camshaft install tips and tricks that was compiled from years of experience installing and running flat tappet cams. Paying attention to all these warnings will still not make the installation bulletproof, but your odds will be better than if you didn't pay attention to them.....
http://www.crankshaftcoalition.com/w...ips_and_tricks