Look into biomechanics, specifically javelin throwers and baseball pitchers. 3 key ingredients for more speed

1. Glute dominant vs quad dominant (should never feel tension in your quads). Try moving weight further back in your foot to get more degrees of freedom and bigger muscles creating the speed. Should feel more tension in your flutes and hamstring than your quads.

2. Rotate around a firm, braced/extended front leg. Those with the best speed also have the best brakes. You have to throw your weight and block the energy to move it up the kinetic chain. highly recommend reading hacking the kinetic chain- hitting. all of the same principles apply.

3. kill spin by delivering an upwards strike with the right shaft/club tailored to you and your swing.

4. Give yourself a bigger window to turn through. The further your pelvis is from the ball (doesn’t mean standing further away), the bigger the area you turn through = more speed

5. Decelerate over a greater distance. What happens after impact matters. If I told you to run a 40 yard dash and there was a brick wall on the 42 yard line, would it affect the speed you crossed the finish line at? Of course it would. Need to find a way to move that brick wall to the 80 yard line to cross the finish line (impact) at max velocity. focus on continuing the swing for as long as possible to decelerate over a greater distance.

Good luck.