Join Date: Nov 2014
Location: Silly Cone Valley
At 90 degrees, to a point, there is no change in leverage. Using that offset tool, if you place your torque wrench parallel to extend the leverage, you increase torque; if you place the torque wrench parallel to the tool so that it overlaps over the nut, then you decrease effective torque. Somewhere in between (90 degrees), there is no change in torque.
The formula to calculate this is:
effective torque = torque spec / (1 + (B x COS Ø)), where B is the length of that silly tool. The Cosine of 90 degrees is zero, so effective torque become equal to the torque spec.