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- Mon Oct 15, 2007 10:20 am
- Forum: Automotive Tech
- Topic: Informative Article on Detonation
- Replies: 3
- Views: 3507
LPP? I thought lpp was dependent upon r/s ratio with the goal of achieving the greatest mechanical advantage on the the crank. I've been told the window is 10 to 20 degrees after tdc. I would think that an engine with a higher r/s ratio would want lpp to be at a point with the rod at a greater angle.