@gerassss lua script for 2 different speed hacks doesn't work

Only the 1 key speeds it up, shift does nothing, tested by replacing 1.1 with 2

The FPS goes back up if I use the speedhack so I'm thinking it's some sort of FPS cap/V sync issue?

Dude, use speedhack hotkeys

The script is working fine for me. Are you pressing the left Shift or the right Shift button? Because the script is bound to the Left Shift key.

If it's still not working for you: can you try to bind it to another key?
Do this by changing "VK_LSHIFT" to the key you want.
You can find the needed codes by Googling for "Cheat Engine Virtual keys", or "Virtual Key Codes". (If you can't find the key code you want, tell me and I'll look it up)