Pretty much anything not covered by the topics above. Short lived production bikes or vehicles, Electrical, Tires, Paint, Brakes, etc. Use this for tech questions, and "Shoot the Bull" for general conversation, no tech.
The benefit of using a larger roller will only be in duration.
2. using a larger diameter roller will increase nominal (zero lash) duration very slightly, and will affect every other point in the lift curve (more lift at the same point of rotation, and longer duration at any lift except 100%), but not in the same proportion
3. the effect is not regular (i.e., not similar to using a high-ratio rocker)
4. the effect is most noticeable in the first few degrees of both the opening and closing ramps, where the lift per degree of rotation rises (the math looks complicated)
5. the effect decays as the roller approaches the nose (where the vector is more vertical with less side-thrust), and almost vanishes near the max lift point (where it is zero)
6. the effect repeats in mirror image on the closing side
7. overlap is entirely composed of opening and closing events, and becomes effectively larger
8. exhaust opening will have slightly faster blow-down, and a stronger wave return
9. intake closing will slightly reduce the cranking compression, but add some inertia fill ABDC (under ideal conditions)
10. more spring tension is needed for the same lobe profile and RPM
11. side-thrust in the block goes up, but should still be reasonable
On balance, probably an improvement over a stock or very mild cam. May be a step backwards on a hot cam (i.e., changes are not all beneficial)
It's a potentially useful tuning tool, since you can do only intakes or only exhaust (intake is more important). If it helps, I would guess the engine can use more cam. If the power doesn't impress you and there are symptoms (jetting, flat spots) either the cam is pretty close now, or more overlap isn't the right direction, etc.
Most stock motors with stock cams will be slightly faster, but may need minor mixture tweaks.
I'm not sure how important this is - but too much lash is going to do more damage than with the stock roller, so watch it carefully until it stops moving around.
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